political science's questions

I have had a Ubuntu 19.04 system. I upgraded it to 20.04 some how I found Vmware tools were not giving desired results. So I decided to upgrade previously installed vmware tools. So I did following.

debian@osboxes:~$ sudo apt-get install open-vm-tools

but while upgrading I got following errors

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  command-not-found-data diffstat example-content g++-8 gettext
  gir1.2-mutter-4 ifupdown intltool-debian libapt-inst2.0 libapt-pkg-perl
  libapt-pkg5.0 libarchive-zip-perl libasync-mergepoint-perl
  libcapture-tiny-perl libclass-factory-util-perl libclone-perl
  libdigest-bubblebabble-perl libdouble-conversion1 libebook-contacts-1.2-2
  libecal-1.2-19 libemail-valid-perl libfuture-perl libgnome-desktop-3-17
  libimport-into-perl libio-async-loop-epoll-perl libio-async-perl
  libio-pty-perl libio-string-perl libip4tc0 libip6tc0 libipc-run-perl
  libisl19 libjson-c3 liblinux-epoll-perl liblist-compare-perl libllvm8
  liblouisutdml8 libmoo-perl libmutter-4-0 libmysqlclient20 libnet-dns-perl
  libnet-dns-sec-perl libnet-domain-tld-perl libnet-ip-perl libosmesa6
  libparse-debianchangelog-perl libpath-tiny-perl libperlio-gzip-perl
  libpoppler85 libqt5designer5 libqt5help5 libqt5sql5 libqt5sql5-sqlite
  libqt5test5 libreoffice-avmedia-backend-gstreamer libsereal-decoder-perl
  libsereal-encoder-perl libsereal-perl libstdc++-8-dev libstrictures-perl
  libstruct-dumb-perl libtagc0 libtest-refcount-perl libtexlua52
  libtext-levenshtein-perl libtype-tiny-perl libtype-tiny-xs-perl
  libunicode-utf8-perl libvpx5 libxml-simple-perl libyaml-libyaml-perl lintian
  multiarch-support patchutils pppconfig pppoeconf python3-cson python3-numpy
  python3-pyqt5 python3-pyqt5.qtsvg python3-sip python3-speg
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  open-vm-tools-desktop
Suggested packages:
  cloud-init
Recommended packages:
  xserver-xorg-input-vmmouse
The following packages will be upgraded:
  open-vm-tools open-vm-tools-desktop
2 upgraded, 0 newly installed, 0 to remove and 151 not upgraded.
Need to get 688 kB of archives.
After this operation, 4,096 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 open-vm-tools amd64 2:11.0.5-4ubuntu0.19.10.1 [547 kB]
Err:1 http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 open-vm-tools amd64 2:11.0.5-4ubuntu0.19.10.1
  File has unexpected size (250 != 547012). Mirror sync in progress? [IP: 91.189.88.142 80]
  Hashes of expected file:
   - SHA256:bbb19129190dede6148f30b79fe04d2a996049b150dc308715d1041e6098784c
   - SHA1:cf49e32b07f318359128325769613abf6c385a87 [weak]
   - MD5Sum:66b78b7b1a39c03980a297325f80b043 [weak]
   - Filesize:547012 [weak]
Get:2 http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 open-vm-tools-desktop amd64 2:11.0.5-4ubuntu0.19.10.1 [141 kB]
Err:2 http://archive.ubuntu.com/ubuntu eoan-updates/main amd64 open-vm-tools-desktop amd64 2:11.0.5-4ubuntu0.19.10.1
  File has unexpected size (250 != 140516). Mirror sync in progress? [IP: 91.189.88.142 80]
  Hashes of expected file:
   - SHA256:5cb835e57d4b93082bd692a9cba6e196cacd87ae39919f17a975defcbbdd3d2e
   - SHA1:637488a815726aa6e6f5a061c694923f10894be1 [weak]
   - MD5Sum:63619ce813958afe99d8ed690b540a27 [weak]
   - Filesize:140516 [weak]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/o/open-vm-tools/open-vm-tools_11.0.5-4ubuntu0.19.10.1_amd64.deb  File has unexpected size (250 != 547012). Mirror sync in progress? [IP: 91.189.88.142 80]
   Hashes of expected file:
    - SHA256:bbb19129190dede6148f30b79fe04d2a996049b150dc308715d1041e6098784c
    - SHA1:cf49e32b07f318359128325769613abf6c385a87 [weak]
    - MD5Sum:66b78b7b1a39c03980a297325f80b043 [weak]
    - Filesize:547012 [weak]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/o/open-vm-tools/open-vm-tools-desktop_11.0.5-4ubuntu0.19.10.1_amd64.deb  File has unexpected size (250 != 140516). Mirror sync in progress? [IP: 91.189.88.142 80]
   Hashes of expected file:
    - SHA256:5cb835e57d4b93082bd692a9cba6e196cacd87ae39919f17a975defcbbdd3d2e
    - SHA1:637488a815726aa6e6f5a061c694923f10894be1 [weak]
    - MD5Sum:63619ce813958afe99d8ed690b540a27 [weak]
    - Filesize:140516 [weak]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

What should I do in this case.

Server indicated failure for sending keys

debian@osboxes:~/$ gpg --keyserver keyserver.ubuntu.com --send-keys 8D32FF6AEEB7BA37
gpg: sending key 8D32FF6AEEB7BA37 to hkp://keyserver.ubuntu.com
gpg: keyserver send failed: Server indicated a failure
gpg: keyserver send failed: Server indicated a failure

I tried to generate gpg keys for myself. I do not know if I did correct or not when I do

debian@osboxes:~/$ gpg --list-keys
/home/debian/.gnupg/pubring.kbx
-------------------------------
pub   rsa3072 2020-06-11 [SC] [expires: 2022-06-11]
      980265BC6D8749B0B57526888D32FF6AEEB7BA37
uid           [ultimate] Political Science 
sub   rsa3072 2020-06-11 [E] [expires: 2022-06-11]

I tried to create GPG keys

Real name: Political Science
Email address: @
You selected this USER-ID:
    "Political Science "

Change (N)ame, (E)mail, or (O)kay/(Q)uit? O
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
gpg: key 8D32FF6AEEB7BA37 marked as ultimately trusted
gpg: directory '/home/debian/.gnupg/openpgp-revocs.d' created
gpg: revocation certificate stored as '/home/debian/.gnupg/openpgp-revocs.d/980265BC6D8749B0B57526888D32FF6AEEB7BA37.rev'
public and secret key created and signed.

pub   rsa3072 2020-06-11 [SC] [expires: 2022-06-11]
      980265BC6D8749B0B57526888D32FF6AEEB7BA37
uid                      Political Science 
sub   rsa3072 2020-06-11 [E] [expires: 2022-06-11]

Now I do I am not able to understand which one of the above is my key which I should sync to keyserver

debian@osboxes:~/$ gpg --keyserver keyserver.ubuntu.com --send-keys 8749B0B57526888D32FF6AEEB7BA37
gpg: "8749B0B57526888D32FF6AEEB7BA37" not a key ID: skipping
debian@osboxes:~/$ gpg --keyserver keyserver.ubuntu.com --send-keys 32FF6AEEB7BA37
gpg: "32FF6AEEB7BA37" not a key ID: skipping

I am trying to do this on basis of an answer here

I am trying to pro grammatically connect to an aws instance. So on my Ubuntu 19.10 I did

python -m install -u pip
/usr/bin/python: No module named install

instructions then I did

debian@osboxes:~/cs605 data management/assignment6$ pip install awscli
Collecting awscli
  Downloading https://files.pythonhosted.org/packages/2b/d8/e466a8ab05244ea2688f76b0f28f02cf21b0821197ccabba5363e5363521/awscli-1.18.13-py2.py3-none-any.whl (3.0MB)
    100% |████████████████████████████████| 3.0MB 75kB/s 
Collecting s3transfer<0.4.0,>=0.3.0 (from awscli)
  Downloading https://files.pythonhosted.org/packages/69/79/e6afb3d8b0b4e96cefbdc690f741d7dd24547ff1f94240c997a26fa908d3/s3transfer-0.3.3-py2.py3-none-any.whl (69kB)
    100% |████████████████████████████████| 71kB 905kB/s 
Collecting botocore==1.15.13 (from awscli)
  Downloading https://files.pythonhosted.org/packages/a6/ca/cd7cac60b830ec3e6b1f9ff924421a11e14a4c1cb1960b22c20e9a7c62e6/botocore-1.15.13-py2.py3-none-any.whl (5.9MB)
    100% |████████████████████████████████| 5.9MB 13kB/s 
Collecting docutils<0.16,>=0.10 (from awscli)
  Downloading https://files.pythonhosted.org/packages/3a/dc/bf2b15d1fa15a6f7a9e77a61b74ecbbae7258558fcda8ffc9a6638a6b327/docutils-0.15.2-py2-none-any.whl (548kB)
    100% |████████████████████████████████| 552kB 590kB/s 
Collecting PyYAML<5.4,>=3.10; python_version != "3.4" (from awscli)
  Downloading https://files.pythonhosted.org/packages/3d/d9/ea9816aea31beeadccd03f1f8b625ecf8f645bd66744484d162d84803ce5/PyYAML-5.3.tar.gz (268kB)
    100% |████████████████████████████████| 276kB 1.5MB/s 
Collecting rsa<=3.5.0,>=3.1.2 (from awscli)
  Downloading https://files.pythonhosted.org/packages/e1/ae/baedc9cb175552e95f3395c43055a6a5e125ae4d48a1d7a924baca83e92e/rsa-3.4.2-py2.py3-none-any.whl (46kB)
    100% |████████████████████████████████| 51kB 1.6MB/s 
Collecting colorama<0.4.4,>=0.2.5; python_version != "3.4" (from awscli)
  Downloading https://files.pythonhosted.org/packages/c9/dc/45cdef1b4d119eb96316b3117e6d5708a08029992b2fee2c143c7a0a5cc5/colorama-0.4.3-py2.py3-none-any.whl
Collecting futures<4.0.0,>=2.2.0; python_version == "2.7" (from s3transfer<0.4.0,>=0.3.0->awscli)
  Downloading https://files.pythonhosted.org/packages/d8/a6/f46ae3f1da0cd4361c344888f59ec2f5785e69c872e175a748ef6071cdb5/futures-3.3.0-py2-none-any.whl
Collecting jmespath<1.0.0,>=0.7.1 (from botocore==1.15.13->awscli)
  Downloading https://files.pythonhosted.org/packages/a3/43/1e939e1fcd87b827fe192d0c9fc25b48c5b3368902bfb913de7754b0dc03/jmespath-0.9.5-py2.py3-none-any.whl
Collecting python-dateutil<3.0.0,>=2.1 (from botocore==1.15.13->awscli)
  Downloading https://files.pythonhosted.org/packages/d4/70/d60450c3dd48ef87586924207ae8907090de0b306af2bce5d134d78615cb/python_dateutil-2.8.1-py2.py3-none-any.whl (227kB)
    100% |████████████████████████████████| 235kB 1.6MB/s 
Collecting urllib3<1.26,>=1.20; python_version != "3.4" (from botocore==1.15.13->awscli)
  Downloading https://files.pythonhosted.org/packages/e8/74/6e4f91745020f967d09332bb2b8b9b10090957334692eb88ea4afe91b77f/urllib3-1.25.8-py2.py3-none-any.whl (125kB)
    100% |████████████████████████████████| 133kB 2.1MB/s 
Collecting pyasn1>=0.1.3 (from rsa<=3.5.0,>=3.1.2->awscli)
  Downloading https://files.pythonhosted.org/packages/62/1e/a94a8d635fa3ce4cfc7f506003548d0a2447ae76fd5ca53932970fe3053f/pyasn1-0.4.8-py2.py3-none-any.whl (77kB)
    100% |████████████████████████████████| 81kB 1.6MB/s 
Requirement already satisfied: six>=1.5 in /usr/lib/python2.7/dist-packages (from python-dateutil<3.0.0,>=2.1->botocore==1.15.13->awscli) (1.12.0)
Building wheels for collected packages: PyYAML
  Running setup.py bdist_wheel for PyYAML ... done
  Stored in directory: /home/debian/.cache/pip/wheels/e4/76/4d/a95b8dd7b452b69e8ed4f68b69e1b55e12c9c9624dd962b191
Successfully built PyYAML
Installing collected packages: futures, jmespath, python-dateutil, urllib3, docutils, botocore, s3transfer, PyYAML, pyasn1, rsa, colorama, awscli
  The scripts pyrsa-decrypt, pyrsa-decrypt-bigfile, pyrsa-encrypt, pyrsa-encrypt-bigfile, pyrsa-keygen, pyrsa-priv2pub, pyrsa-sign and pyrsa-verify are installed in '/home/debian/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.

Now I do check if awscli has been installed I get following

$aws --version here is the output

Command 'aws' not found, but can be installed with:

sudo snap install aws-cli  # version 1.16.266, or
sudo apt  install awscli   # version 1.16.218-1

See 'snap info aws-cli' for additional versions.

So why did installing awscli from python or pip failed. What mistake I did here?

update 1
now I did apt-get install python3-pip as per suggestion https://stackoverflow.com/questions/33023599/usr-local-bin-python-no-module-named-pip

debian@osboxes:~/cs605 data management/assignment6$ pip --version
pip 18.1 from /usr/lib/python2.7/dist-packages/pip (python 2.7)
debian@osboxes:~/cs605 data management/assignment6$ pip3 --version
pip 18.1 from /usr/lib/python3/dist-packages/pip (python 3.7)

so how to use pip3 for installing awscli ?

I have aws instance key .pem file I saved that in a folder

"home/debian/cs605\ data\ management/assignment6/mumbai\ instance\ keys"

the key name is mumbai-instance-1.pem

I wrote a small bash script like this

!/bin/bash

AWS_KEY="home/debian/cs605\ data\ management/assignment6/mumbai\ instance\ keys"

ssh -v -i $AWS_KEY/mumbai-instance-1.pem
[email protected]

the above file was saved named mumbai in following folder

/home/debian/cs605 data management/assignment6

now I try to launch the script after chmox +x mumbai but I am getting error

Warning: Identity file home/debian/cs605\ not accessible: No such file or directory.
OpenSSH_8.0p1 Ubuntu-6build1, OpenSSL 1.1.1c  28 May 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
ssh: Could not resolve hostname data\\: Name or service not known
./mumbai: line 6: [email protected]: command not found

so what is this error and how can I get rid of this.

update 1
I tried the method mentioned in answer

debian@osboxes:~/cs605 data management/assignment6$ ./mumbai
Warning: Identity file home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem not accessible: No such file or directory.
usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]
           [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
           [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11]
           [-i identity_file] [-J [user@]host[:port]] [-L address]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-Q query_option] [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] destination [command]
./mumbai: line 6: [email protected]: command not found

I checked the permissions of file

debian@osboxes:~/cs605 data management/assignment6/mumbai instance keys$ ls -l
total 8
-rwxr-xr-x 1 debian debian 1692 Mar  3 14:24 mumbai-instance-1.pem
-rwxrw-rw- 1 debian debian 1464 Mar  3 14:30 mumbai-instance-pvt.ppk

so I don't think this should be a permissions issue.

I did a mistake above in AWS_KEY it should be /home

update2

Now while fixing the above issues I get following when I execute the above script with AWS_KEY="/home/debian/cs605\ data\ management/assignment6/mumbai\ instance\ keys"

debian@osboxes:~/cs605 data management/assignment6$ ./mumbai
OpenSSH_8.0p1 Ubuntu-6build1, OpenSSL 1.1.1c  28 May 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to ec2-xx-xxx-xx-xxx.ap-south-1.compute.amazonaws.com [xx-xxx-xx-xxx] port 22.
debug1: Connection established.
debug1: identity file /home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem type -1
debug1: identity file /home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.0p1 Ubuntu-6build1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to ec2-xx-xxx-xx-xxx.ap-south-1.compute.amazonaws.com:22 as 'ec2-user'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:q5biO+y+QovuhX7TUfVShKOh7nQ/TaVUPhs8YI8EJOs
The authenticity of host 'ec2-xx-xxx-xx-xxx.ap-south-1.compute.amazonaws.com (xx-xxx-xx-xxx)' can't be established.
ECDSA key fingerprint is SHA256:q5biO+y+QovuhX7TUfVShKOh7nQ/TaVUPhs8YI8EJOs.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'ec2-xx-xxx-xx-xxx.ap-south-1.compute.amazonaws.com,xx-xxx-xx-xxx' (ECDSA) to the list of known hosts.
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: debian@osboxes RSA SHA256:iFf3gBtMBnZsrEYwqUEZBanwk9vj6/nf64NfpGerACU agent
debug1: Will attempt key: /home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem  explicit
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1001)


debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1001)


debug1: Next authentication method: publickey
debug1: Offering public key: debian@osboxes RSA SHA256:iFf3gBtMBnZsrEYwqUEZBanwk9vj6/nf64NfpGerACU agent
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Trying private key: /home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0755 for '/home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "/home/debian/cs605 data management/assignment6/mumbai instance keys/mumbai-instance-1.pem": bad permissions
debug1: No more authentication methods to try.
[email protected]: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

ok I fixed it the key file should have 700 permission and 750 or 755 is not acceptible.

First I did

debian@osboxes:~/Desktop$ mysql -u root -p

Command 'mysql' not found, but can be installed with:

sudo apt install mysql-client-core-8.0     # version 8.0.18-0ubuntu0.19.10.1, or
sudo apt install mariadb-client-core-10.3  # version 1:10.3.20-0ubuntu0.19.10.1

then I installed

debian@osboxes:~/Desktop$ sudo apt install mysql-client-core-8.0 

Now I do

debian@osboxes:~/Desktop$ mysql -u root -p
Enter password: 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

So now I check

debian@osboxes:~/Desktop$ sudo service mysql status
Unit mysql.service could not be found.

then I do

debian@osboxes:~/Desktop$ ps aux | grep mysql
debian     4379  0.0  0.0   8896   916 pts/0    S+   14:38   0:00 grep --color=auto mysql

so it seems mysql service is running. but when I Try to login now

debian@osboxes:~/Desktop$ mysql -u root -p
Enter password: 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
debian@osboxes:~/Desktop$ 

I also tried.

debian@osboxes:~/Desktop$ systemctl restart mysql
Failed to restart mysql.service: Unit mysql.service not found.

debian@osboxes:~/Desktop$ sudo dpkg -l | grep -E 'mysql'
ii  libmysqlclient21:amd64                     8.0.18-0ubuntu0.19.10.1                 amd64        MySQL database client library
ii  mysql-client-core-8.0                      8.0.18-0ubuntu0.19.10.1                 amd64        MySQL database core client binaries
ii  mysql-common                               5.8+1.0.5ubuntu2                        all          MySQL database common files, e.g. /etc/mysql/my.cnf
debian@osboxes:~/Desktop$ 

Last week I had asked question mysql does not start after a reboot so I know I had installed mysql on this machine in problem. But still I face the problem so tried

debian@osboxes:~/Desktop$ sudo apt-get install mysql-server
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 4531 (unattended-upgr) - open (11: Resource temporarily unavailable)
N: Be aware that removing the lock file is not a solution and may break your system.
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

I also checked

debian@osboxes:~/Desktop$ systemctl -a | grep -iE 'mysql'

there was no output. Also I do

debian@osboxes:~/Desktop$ sudo netstat -tap | grep mysql
sudo: netstat: command not found

then I do

debian@osboxes:~/Desktop$ sudo apt-get install net-tools
debian@osboxes:~/Desktop$ sudo netstat -tap | grep mysql

No output.

Now based on comments below I did

debian@osboxes:~/Desktop$ sudo rm /var/lib/dpkg/lock
debian@osboxes:~/Desktop$ sudo dpkg --configure -a
debian@osboxes:~/Desktop$ sudo systemctl restart mysql.service
Failed to restart mysql.service: Unit mysql.service not found.

Now try

debian@osboxes:~/Desktop$ sudo rm /var/cache/apt/archives/lock 

Now I reboot and then

debian@osboxes:~/Desktop$ ps aux | grep mysql
debian     2403  0.0  0.0   8896   844 pts/0    S+   15:10   0:00 grep --color=auto mysql
debian@osboxes:~/Desktop$ mysql -u root -p
Enter password: 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

It is taking root password which I tried last week. I am not able to understand what should I check. I can't login. What should I check now? I am on Ubuntu 19.10

I am using Ubuntu 19.10 and installed mysql-server on it. First it gave me an error

error was mysql access denied for user 'root'@'localhost'

solved by code below

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';

based on an answer here https://stackoverflow.com/questions/41645309/mysql-error-access-denied-for-user-rootlocalhost

I had rebooted the virtual machine now when I try to login

debian@osboxes:~$ mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

I tried following

debian@osboxes:~$ mysql -u root -p 123456
Enter password: 
ERROR 1049 (42000): Unknown database '123456'

I want to know what mistake I am doing. I am trying to use mysql for some assignments is the above not the correct way to go to an sql prompt. What else should I do? I am using Ubuntu 19.10.

I don't have any idea of upstart echo system back in those days we used to have init scripts to start and stop daemons so I am browsing internet and it has become quite confusing what to do and what not to do. Like is the mysql service not available these days or what exactly I need to do to make sure after reboot mysql service is running. Which files should I check.

I wanted to play some songs when I got to see this

I have a few flv files and I wanted to play them. I am using Ubuntu in a Vmware environment here is when I see all the problems. This one was upgraded from 19.04 to 19.10 my /etc/apt/sources.list file looks like this

# deb cdrom:[Ubuntu 19.04 _Disco Dingo_ - Release amd64 (20190416)]/ disco main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu eoan main
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu eoan-updates main
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu eoan universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco universe
deb http://archive.ubuntu.com/ubuntu eoan-updates universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://archive.ubuntu.com/ubuntu eoan multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco multiverse
deb http://archive.ubuntu.com/ubuntu eoan-updates multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb-src http://us.archive.ubuntu.com/ubuntu/ disco-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu disco partner
# deb-src http://archive.canonical.com/ubuntu disco partner

deb http://archive.ubuntu.com/ubuntu eoan-security main
# deb-src http://security.ubuntu.com/ubuntu disco-security main restricted
deb http://archive.ubuntu.com/ubuntu eoan-security universe
# deb-src http://security.ubuntu.com/ubuntu disco-security universe
deb http://archive.ubuntu.com/ubuntu eoan-security multiverse
# deb-src http://security.ubuntu.com/ubuntu disco-security multiverse

# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
deb http://archive.ubuntu.com/ubuntu eoan-backports universe multiverse main
# see the sources.list(5) manual.

https://pastebin.com/CiUTguW7

any other file if I should paste let me know
edit 1
in my /etc/apt/sources.list.d/ there are 2 files

docker.list  linuxuprising-ubuntu-java-eoan.list

and docker.list file has following

deb [arch=amd64] https://download.docker.com/linux/ubuntu eoan stable

and linuxuprising-ubuntu-java-eoan.list file has

deb http://ppa.launchpad.net/linuxuprising/java/ubuntu eoan main
# deb-src http://ppa.launchpad.net/linuxuprising/java/ubuntu eoan main

I am using gmail on Thunderbird on Ubuntu 19.10. I configured the Thunderbird for IMAP access with gmail and emails were probably downloaded as at the time of taking screenshot download was happening. I do not know the location but I can see all the folders. Here is a screenshot. my gmail inbox is full 13 gb out of 15 gb. https://superuser.com/questions/1502126/13-66-gb-out-of-15-gb-used-in-gmail-delete-emails-that-consumed-space

Some one suggested me to use Thunderbird. Now I have configured Thunderbird to use with gmail now how to I go deleting thousands of emails I have to find some emails which might be having photos or documents which might be heavy in size. Is there an easy way or script to do the same any link to a GitHub script for sorting out emails based on size or attachments etc. Which I can try in Ubuntu 19.10.

I am doing all this on Ubuntu 19.10 in thunderbird default application which is installed with OS. I am having problem in configuring thunderbird in VMware environment. I am using VMware 15 workstation. I have problem in using Gmail I discussed them here https://superuser.com/questions/1502126/13-66-gb-out-of-15-gb-used-in-gmail-delete-emails-that-consumed-space now I want to try the suggestion given to me. So I started configuring thunderbird in ubuntu19.10 in VMware Every thing was automatic I did not enter any values except my username and password. But I got error as shown in screenshot. In my Gmail settings I checked POP3 and IMAP are allowed. So how do I configure thunderbird in this environment to work.

I installed Hadoop on a Ubuntu virtual machine. I downloaded the source file that means among the releases available on this page https://hadoop.apache.org/releases.html I downloaded 3.1.3 file https://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-3.1.3/hadoop-3.1.3-src.tar.gz the installation was successful. I got following message It appears that I have low memory. I have allotted 2 GB of memory for this virtual machine of Ubuntu. If you can see in above screenshot there are many more virtual machines which I intend to use. I need other virtual machines for various development works. I want to know how should or rather in what range I should increase the memory so that I can work with Hadoop ecosystem on ubuntu 19.10. I plan to do some development work which can be done with single nodes later on I want to work with multiple nodes. I am doing all this on my laptop which has 12 GB RAM. and I have following virtual machines
1)Ubuntu 19.10 VM
2)Debian 10 VM
3)Windows 10 VM
4)Cloudera Hadoop VM
5)Ubuntu 19.10 (I have installed Hadoop in this VM)

I have given 2 GB to all VMs. I also want to know as seen in above I get a Hadoop command prompt. How can I again get it I mean if I power off the machine. I notice the shell in above images as debian@4d943db32085:~/hadoop$

debian is my username configured in Ubuntu 19.10 I want to know what is this kind of shell that I got above and why is this number debian@4d943db32085 coming

I am using Ubuntu 19.10 and I have python 2.7 installed on it. I want to upgrade to python 3.7 on it. How do I do it? I have downloaded https://www.anaconda.com/ for 3.7 version of Linux and installed it. Does it do the needful or I need to install or upgrade to python 3.7. If I have to do then how should I do it?

edit this was a Ubuntu 19.04 virtual machine which was upgraded to 19.10 not a clean install. The VMware image for 19.04 was downloaded from www.osboxes.org/ubuntu

 debian@osboxes:~$ python -V
    Python 2.7.17rc1

I was installing Hadoop on Ubuntu 19.10 I got following errors I am comipiling https://hadoop.apache.org/releases.html file version https://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-3.1.3/hadoop-3.1.3-src.tar.gz from instructions given in BUILDING.txt file during compilation I get following error

In file included from ./google/protobuf/io/tokenizer.h:42:0,
                 from google/protobuf/io/tokenizer.cc:91:
./google/protobuf/stubs/strutil.h: In function 'google::protobuf::int64 google::protobuf::strto64(const char*, char**, int)':
./google/protobuf/stubs/strutil.h:319:25: warning: typedef 'sizeof_int64_is_not_sizeof_long_long' locally defined but not used [-Wunused-local-typedefs]
                         sizeof_int64_is_not_sizeof_long_long);
                         ^
./google/protobuf/stubs/common.h:382:11: note: in definition of macro 'GOOGLE_COMPILE_ASSERT'
           msg[bool(expr) ? 1 : -1]
           ^
./google/protobuf/stubs/strutil.h: In function 'google::protobuf::uint64 google::protobuf::strtou64(const char*, char**, int)':
./google/protobuf/stubs/strutil.h:325:25: warning: typedef 'sizeof_uint64_is_not_sizeof_long_long' locally defined but not used [-Wunused-local-typedefs]
                         sizeof_uint64_is_not_sizeof_long_long);
                         ^
./google/protobuf/stubs/common.h:382:11: note: in definition of macro 'GOOGLE_COMPILE_ASSERT'
 msg[bool(expr) ? 1 : -1]
           ^

How to solve above errors?

debian@osboxes:~/hadoop/hadoop-3.1.3-src$ sudo apt-get update --fix-missing
Hit:1 http://ppa.launchpad.net/linuxuprising/java/ubuntu eoan InRelease        
Hit:2 http://archive.ubuntu.com/ubuntu eoan InRelease                          
Get:3 http://archive.ubuntu.com/ubuntu eoan-updates InRelease [97.5 kB]        
Ign:4 https://download.docker.com/linux/ubuntu eoan InRelease
Err:5 https://download.docker.com/linux/ubuntu eoan Release                    
  404  Not Found [IP: 13.249.210.98 443]
Get:6 http://archive.ubuntu.com/ubuntu eoan-security InRelease [97.5 kB]       
Get:7 http://archive.ubuntu.com/ubuntu eoan-backports InRelease [88.8 kB]      
Reading package lists... Done                                                  
E: The repository 'https://download.docker.com/linux/ubuntu eoan Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

and also

debian@osboxes:~/hadoop/hadoop-3.1.3-src$ sudo apt-get update
Err:1 http://ppa.launchpad.net/linuxuprising/java/ubuntu eoan InRelease
  Temporary failure resolving 'ppa.launchpad.net'
Err:2 https://download.docker.com/linux/ubuntu eoan InRelease            
  Temporary failure resolving 'download.docker.com'
Err:3 http://archive.ubuntu.com/ubuntu eoan InRelease                    
  Temporary failure resolving 'archive.ubuntu.com'
Err:4 http://archive.ubuntu.com/ubuntu eoan-updates InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Err:5 http://archive.ubuntu.com/ubuntu eoan-security InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Err:6 http://archive.ubuntu.com/ubuntu eoan-backports InRelease
  Temporary failure resolving 'archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/eoan/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/eoan-updates/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/eoan-security/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/eoan-backports/InRelease  Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch https://download.docker.com/linux/ubuntu/dists/eoan/InRelease  Temporary failure resolving 'download.docker.com'
W: Failed to fetch http://ppa.launchpad.net/linuxuprising/java/ubuntu/dists/eoan/InRelease  Temporary failure resolving 'ppa.launchpad.net'
W: Some index files failed to download. They have been ignored, or old ones used instead.
debian@osboxes:~/Hadoop

edit
after a struggle of 2-3 days installing and re installing proceeding with re building I think I have succeeded. I have got some thing which I can see in screenshot as below

Now what should I do next from here? This seems to be some kind of environment of Hadoop but I am new to this so I do not know what to do next? I have to do some assignment questions for programming like I want to learn also Hadoop from the shell I see above what command should I type or how to do programming etc in it.

I had to install Hadoop on ubuntu 19.10 I had started the installation after some time it started downloading packages etc and connecting things from internet. I had left my laptop.

I went to some work in some other building in department. Later I came back there was some wifi dysconnectivity problem. Due to which installation had probably hanged or broken in between

. I was compiling it from sources https://hadoop.apache.org/releases.html
I want to know how to restart the hadoop installation from the part where it broke. I am pasting the error messages which I saw on terminal

debian@osboxes:~/hadoop/hadoop-3.1.3-src$ sudo ./start-build-env.sh 
Sending build context to Docker daemon  12.29kB
Step 1/36 : FROM ubuntu:xenial
xenial: Pulling from library/ubuntu
e80174c8b43b: Pull complete 
d1072db285cc: Pull complete 
858453671e67: Pull complete 
3d07b1124f98: Pull complete 
Digest: sha256:bb5b48c7750a6a8775c74bcb601f7e5399135d0a06de004d000e05fd25c1a71c
Status: Downloaded newer image for ubuntu:xenial
 ---> 5f2bf26e3524
Step 2/36 : WORKDIR /root
 ---> Running in 72cf4c8b1db1
Removing intermediate container 72cf4c8b1db1
 ---> 81c9b83ca600
Step 3/36 : RUN echo APT::Install-Recommends "0"\; > /etc/apt/apt.conf.d/10disableextras
 ---> Running in 3cd8b4905e58
Removing intermediate container 3cd8b4905e58
 ---> c36ec6e01627
Step 4/36 : RUN echo APT::Install-Suggests "0"\; >>  /etc/apt/apt.conf.d/10disableextras
 ---> Running in 904d844e6670
Removing intermediate container 904d844e6670
 ---> 0b92e04c7c4b
Step 5/36 : ENV DEBIAN_FRONTEND noninteractive
 ---> Running in e6112f0d3364
Removing intermediate container e6112f0d3364
 ---> 5516fb2c3e3e
Step 6/36 : ENV DEBCONF_TERSE true
 ---> Running in 38545d5b8232
Removing intermediate container 38545d5b8232
 ---> fd4ac783d7c5
Step 7/36 : RUN apt-get -q update && apt-get -q install -y     apt-utils     build-essential     bzip2     curl     doxygen     fuse     g++     gcc     git     gnupg-agent     libbz2-dev     libcurl4-openssl-dev     libfuse-dev     libprotobuf-dev     libprotoc-dev     libsnappy-dev     libssl-dev     libtool     libzstd1-dev     locales     make     pinentry-curses     pkg-config     python     python2.7     python-pip     python-pkg-resources     python-setuptools     python-wheel     rsync     software-properties-common     snappy     sudo     zlib1g-dev
 ---> Running in fb21dae2829d
Step 8/36 : RUN apt-get -q install -y openjdk-8-jdk
 ---> Running in e88bcf7743e2
Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
  ca-certificates-java java-common libasound2 libasound2-data libasyncns0
  libflac8 libgif7 libgtk2.0-0 libgtk2.0-common libjson-c2 libnspr4 libnss3
  libnss3-nssdb libpcsclite1 libpulse0 libsndfile1 libwrap0
  openjdk-8-jdk-headless openjdk-8-jre openjdk-8-jre-headless
Suggested packages:
  default-jre libasound2-plugins alsa-utils gvfs pcscd pulseaudio
  openjdk-8-demo openjdk-8-source visualvm icedtea-8-plugin libnss-mdns
  fonts-dejavu-extra fonts-ipafont-gothic fonts-ipafont-mincho
  fonts-wqy-microhei fonts-wqy-zenhei fonts-indic
Recommended packages:
  libgtk2.0-bin tcpd libxt-dev fonts-dejavu-extra
The following NEW packages will be installed:
  ca-certificates-java java-common libasound2 libasound2-data libasyncns0
  libflac8 libgif7 libgtk2.0-0 libgtk2.0-common libjson-c2 libnspr4 libnss3
  libnss3-nssdb libpcsclite1 libpulse0 libsndfile1 libwrap0 openjdk-8-jdk
  openjdk-8-jdk-headless openjdk-8-jre openjdk-8-jre-headless
0 upgraded, 21 newly installed, 0 to remove and 0 not upgraded.
Need to get 41.3 MB of archives.
After this operation, 156 MB of additional disk space will be used.
Err:1 http://archive.ubuntu.com/ubuntu xenial/main amd64 libjson-c2 amd64 0.11-4ubuntu2
  Temporary failure resolving 'archive.ubuntu.com'
Err:2 http://archive.ubuntu.com/ubuntu xenial/main amd64 libasyncns0 amd64 0.8-5build1
  Temporary failure resolving 'archive.ubuntu.com'
Err:3 http://archive.ubuntu.com/ubuntu xenial/main amd64 libwrap0 amd64 7.6.q-25
  Temporary failure resolving 'archive.ubuntu.com'
Err:4 http://archive.ubuntu.com/ubuntu xenial/main amd64 java-common all 0.56ubuntu2
  Temporary failure resolving 'archive.ubuntu.com'
Err:5 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnspr4 amd64 2:4.13.1-0ubuntu0.16.04.1
  Temporary failure resolving 'archive.ubuntu.com'
Ign:6 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnss3-nssdb all 2:3.28.4-0ubuntu0.16.04.6
Err:5 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnspr4 amd64 2:4.13.1-0ubuntu0.16.04.1
  Temporary failure resolving 'archive.ubuntu.com'
Ign:7 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnss3 amd64 2:3.28.4-0ubuntu0.16.04.6
Err:6 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnss3-nssdb all 2:3.28.4-0ubuntu0.16.04.6
  Temporary failure resolving 'archive.ubuntu.com'
Ign:8 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libpcsclite1 amd64 1.8.14-1ubuntu1.16.04.1
Err:7 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libnss3 amd64 2:3.28.4-0ubuntu0.16.04.6
  Temporary failure resolving 'archive.ubuntu.com'
Get:8 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libpcsclite1 amd64 1.8.14-1ubuntu1.16.04.1 [21.4 kB]
Get:9 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 openjdk-8-jre-headless amd64 8u222-b10-1ubuntu1~16.04.1 [27.1 MB]
Err:8 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libpcsclite1 amd64 1.8.14-1ubuntu1.16.04.1
  Hash Sum mismatch
Err:9 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jre-headless amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Get:10 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 ca-certificates-java all 20160321ubuntu1 [12.5 kB]
Get:9 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jre-headless amd64 8u222-b10-1ubuntu1~16.04.1 [27.1 MB]
Err:10 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 ca-certificates-java all 20160321ubuntu1
  Hash Sum mismatch
Err:9 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jre-headless amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Err:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 libasound2-data all 1.1.0-0ubuntu1
  Hash Sum mismatch
Get:12 http://archive.ubuntu.com/ubuntu xenial/main amd64 libasound2 amd64 1.1.0-0ubuntu1 [350 kB]
Err:12 http://archive.ubuntu.com/ubuntu xenial/main amd64 libasound2 amd64 1.1.0-0ubuntu1
  Hash Sum mismatch
Get:13 http://archive.ubuntu.com/ubuntu xenial/main amd64 libflac8 amd64 1.3.1-4 [210 kB]
Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgif7 amd64 5.1.4-0.3~16.04.1 [30.5 kB]
Err:13 http://archive.ubuntu.com/ubuntu xenial/main amd64 libflac8 amd64 1.3.1-4
  Hash Sum mismatch
Err:14 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libgif7 amd64 5.1.4-0.3~16.04.1
  Hash Sum mismatch
Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgtk2.0-common all 2.24.30-1ubuntu1.16.04.2 [123 kB]
Get:14 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libgif7 amd64 5.1.4-0.3~16.04.1 [30.5 kB]
Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgtk2.0-0 amd64 2.24.30-1ubuntu1.16.04.2 [1775 kB]
Err:15 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgtk2.0-common all 2.24.30-1ubuntu1.16.04.2
  Hash Sum mismatch
Err:14 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libgif7 amd64 5.1.4-0.3~16.04.1
  Hash Sum mismatch
Err:16 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgtk2.0-0 amd64 2.24.30-1ubuntu1.16.04.2
  Hash Sum mismatch
Get:17 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libsndfile1 amd64 1.0.25-10ubuntu0.16.04.2 [139 kB]
Err:17 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libsndfile1 amd64 1.0.25-10ubuntu0.16.04.2
  Hash Sum mismatch
Err:18 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libpulse0 amd64 1:8.0-0ubuntu3.10
  Hash Sum mismatch
Get:19 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 openjdk-8-jre amd64 8u222-b10-1ubuntu1~16.04.1 [68.8 kB]
Get:17 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libsndfile1 amd64 1.0.25-10ubuntu0.16.04.2 [139 kB]
Err:19 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jre amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Err:17 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libsndfile1 amd64 1.0.25-10ubuntu0.16.04.2
  Hash Sum mismatch
Get:20 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 openjdk-8-jdk-headless amd64 8u222-b10-1ubuntu1~16.04.1 [8212 kB]
Get:21 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 openjdk-8-jdk amd64 8u222-b10-1ubuntu1~16.04.1 [1607 kB]
Get:19 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jre amd64 8u222-b10-1ubuntu1~16.04.1 [68.8 kB]
Err:20 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jdk-headless amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Ign:21 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jdk amd64 8u222-b10-1ubuntu1~16.04.1
Err:19 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jre amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Get:20 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jdk-headless amd64 8u222-b10-1ubuntu1~16.04.1 [8212 kB]
Err:20 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jdk-headless amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Get:21 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jdk amd64 8u222-b10-1ubuntu1~16.04.1 [1607 kB]
Err:21 http://security.ubuntu.com/ubuntu xenial-security/main amd64 openjdk-8-jdk amd64 8u222-b10-1ubuntu1~16.04.1
  Hash Sum mismatch
Fetched 113 kB in 2min 53s (650 B/s)
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/j/json-c/libjson-c2_0.11-4ubuntu2_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/liba/libasyncns/libasyncns0_0.8-5build1_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0_7.6.q-25_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/j/java-common/java-common_0.56ubuntu2_all.deb  Temporary failure resolving 'archive.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/n/nspr/libnspr4_4.13.1-0ubuntu0.16.04.1_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/n/nss/libnss3-nssdb_3.28.4-0ubuntu0.16.04.6_all.deb  Temporary failure resolving 'archive.ubuntu.com'

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/n/nss/libnss3_3.28.4-0ubuntu0.16.04.6_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'

    E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

What should I do to restart it from point where thing broke. I followed instructions in BUILDING.txt file from the downloaded

/home/debian/hadoop/hadoop-3.1.3-src

Some how due to broken connections what should I do is not mentioned? If any one wants to see full error messages they can see this https://pastebin.com/rRmUDKcn Let me know what should I do.

I am using 19.10 upgraded from 19.04. The OS was a virtual machine image downloaded from https://www.osboxes.org/ubuntu/ the downloaded image was 19.04 which I had upgraded to 19.10 There were some problems during upgrade which I managed to solve.ubuntu stuck on boot in after upgrade to 19.10 from 19.04 in vmware [end kernel panic not syncing:VFS:unable to mount root fs on block (0,0)]

The default passwords were https://www.osboxes.org/faq/what-are-the-credentials-for-virtual-machine-image/ I had a default administrator account osboxes.org which I removed and created a new user called debian (this I did on 19.10 after upgrading from 19.04) During the use of machines before upgrade I probably had reset the root password which I forgot and after upgrading I had deleted the original user account osboxes.org. I had created a new user username:debian I forgot its password also. So I thought of resetting root password as explained here https://md3v.com/linux-give-root-password-for-maintenance-lost-password
every thing worked perfectly I was able to reset the root password. Now when I try to login from Gnome interface as root the updated password is not accepted as a result I am locked out. How can I get out of this situation I don't see any error messages also. I set my root password as debian and this is not working.

I had Ubuntu 19.04 64 bit virtual machine I upgraded it to 19.10. After the upgrade finished the virtual machine has stuck on boot in VMware workstation 15. I had used a vmdk image for 19.04 available here www dot osboxes dot org slash Ubuntu (less than 10 reputation can not post more than 8 links so have to keep it that way)

I made a couple of videos while I was upgrading the virtual machine ( I followed the instructions here www dot liquidweb dot com/kb/troubleshooting-please-install-available-updates-release-upgrading/) The videos are as follows

Ubuntu 19.04 to 19.10 upgrade messages

Part 1: https://youtu.be/la-kwFYGl14
Part 2: https://youtu.be/U_j-aQRMGW4
Part 3: https://youtu.be/80OPkahASmQ
Part 4: https://youtu.be/nPSo-7daCuQ

Now what could be the problem here as why a fresh upgrade is not able to boot into a system. What should I check in here or do to fix this? This is a fresh upgrade and what ever kept happening I let it happen. I logged in to tty6 I get following screenshot. I have not restarted the system since the upgrade from 19.04 to 19.10 kept happening.

Then while I posted this question here I some how was able to restart the system and now I get

end kernel panic not syncing :VFS: Unable to mount root fs on unknown block (0,0)

Here is a video for the same. Now I don't know what should I do. Why this problem came. How to debug this and fix this. Rather than creating a new VM by downloading a new ISO I am more interested to learn and fix the problem which has caused this.

Part 5: https://youtu.be/JhFJEj2dUOM
I seem to have figured out something which might be applicable as mentioned at Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) the thing is before upgrading I did not note down on a paper or pencil as which kernel version was running or to what version the upgrade took place. I have been running defaults only so it should not be a problem. Someone in comments mentioned

"On my ubuntu 19.10 I've had to run apt install initramfs-tools in order to get update-initramfs command –" How can I execute these commands given my situation in video 5.

The thing is I do not know how to work with advanced boot menu please see the screenshots and videos I uploaded to understand my situation.

Even after booting into one of the kernels in advanced options, I get kernel panic messages.

There is some knowledge gap in my situation I probably have figured out something which I should try but I am not able to understand how to proceed from here.

I have been using (rather say trying to use Ubuntu 19.04) in a virtual machine. There have been n number of problems. Like Unable to get IP on my Ubuntu 19.04 virtual machine and changing username for ever in 19.04 I installed Latex packages in it. I want to use TexLive in it due to some research work. But due to various problems I faced in this virtual machine I will delete this one. I want to know is it possible to use the downloaded texlive packages in one installation to install in another instance. The download was approximately 1 Gb and bandwidth is a problem for me. I can not again and again download packages. If this is possible please let me know.