Here are the details:

# cat /etc/release

    DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=20.04
    DISTRIB_CODENAME=focal
    DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS"
    NAME="Ubuntu"
    VERSION="20.04.1 LTS (Focal Fossa)"
    ID=ubuntu
    ID_LIKE=debian
    PRETTY_NAME="Ubuntu 20.04.1 LTS"
    VERSION_ID="20.04"
    HOME_URL="https://www.ubuntu.com/"
    SUPPORT_URL="https://help.ubuntu.com/"
    BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
    PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
    VERSION_CODENAME=focal
    UBUNTU_CODENAME=focal

# mysqld --version

    /usr/sbin/mysqld  Ver 8.0.22-0ubuntu0.20.04.2 for Linux on x86_64 ((Ubuntu))

root@XXXXXXX:~# cat /etc/mysql/mysql.conf.d/mysqld.cnf | grep --color bind

bind-address            = 0.0.0.0

Mysql Service Status:

root@XXXXXXX:~# systemctl status mysql.service
● mysql.service - MySQL Community Server
     Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
     Active: active (running) since Tue 2021-03-02 12:54:00 UTC; 1h 12min ago
    Process: 31460 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
   Main PID: 31484 (mysqld)
     Status: "Server is operational"
      Tasks: 40 (limit: 2372)
     Memory: 356.6M
     CGroup: /system.slice/mysql.service
             └─31484 /usr/sbin/mysqld

Mar 02 12:53:59 ip-192-168-1-115 systemd[1]: Starting MySQL Community Server...
Mar 02 12:54:00 ip-192-168-1-115 systemd[1]: Started MySQL Community Server.

root@XXXXXXX:~# tail -100 /var/log/mysql/mysql.log

/usr/sbin/mysqld, Version: 8.0.22-0ubuntu0.20.04.2 ((Ubuntu)). started with:
Tcp port: 3306  Unix socket: /var/run/mysqld/mysqld.sock
Time                 Id Command    Argument
2021-03-02T12:53:51.185036Z        12 Query     FLUSH PRIVILEGES
2021-03-02T12:53:54.040659Z        12 Quit

root@XXXXXXX:~# tail -25 /var/log/mysql/error.log

2021-03-02T11:48:38.852882Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-03-02T11:48:38.993865Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2021-03-02T11:48:39.083889Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-03-02T11:48:39.084070Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-03-02T11:48:39.110064Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.22-0ubuntu0.20.04.2'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  (Ubuntu).
2021-03-02T12:16:18.763905Z 137 [ERROR] [MY-013134] [Server] Table './flash@002dfast@002dprod@002ddb/videos' is marked as crashed and should be repaired
2021-03-02T12:16:18.765400Z 137 [Warning] [MY-010756] [Server] Checking table:   './flash@002dfast@002dprod@002ddb/videos'
2021-03-02T12:38:29.704195Z 0 [System] [MY-013172] [Server] Received SHUTDOWN from user <via user signal>. Shutting down mysqld (Version: 8.0.22-0ubuntu0.20.04.2).
2021-03-02T12:38:31.195350Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22-0ubuntu0.20.04.2)  (Ubuntu).
2021-03-02T12:38:31.627975Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.22-0ubuntu0.20.04.2) starting as process 31217
2021-03-02T12:38:31.637190Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-03-02T12:38:31.975618Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-03-02T12:38:32.112947Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2021-03-02T12:38:32.200447Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-03-02T12:38:32.200629Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-03-02T12:38:32.233977Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.22-0ubuntu0.20.04.2'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  (Ubuntu).
2021-03-02T12:53:58.504425Z 0 [System] [MY-013172] [Server] Received SHUTDOWN from user <via user signal>. Shutting down mysqld (Version: 8.0.22-0ubuntu0.20.04.2).
2021-03-02T12:53:59.610387Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.22-0ubuntu0.20.04.2)  (Ubuntu).
2021-03-02T12:54:00.048268Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.22-0ubuntu0.20.04.2) starting as process 31484
2021-03-02T12:54:00.058643Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-03-02T12:54:00.443835Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2021-03-02T12:54:00.581426Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2021-03-02T12:54:00.665735Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-03-02T12:54:00.665956Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-03-02T12:54:00.693806Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.22-0ubuntu0.20.04.2'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  (Ubuntu).

Error when trying to connect from another host which is hashed out as ABCXYZ:

root@ABCXYZ:~# mysql -u'phpmyadmin' -p -h192.168.1.115 -P3306
Enter password:
ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.1.115' (110)
root@ABCXYZ:~#

Using exactly the same command from the mysql server (i.e. in this hashed out as XXXXXXX) & it works fine and we are able to connect:

root@XXXXXXX:~# mysql -u'phpmyadmin' -p -h192.168.1.115 -P3306

I also did packet capture on the "" to ensure that there is no connectivity issue from ""
root@ip-172-31-32-115:~# tcpdump -n host 192.168.1.188
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes



12:43:19.631926 IP 192.168.1.188.47250 > 192.168.1.115.3306: Flags [S], seq 945902876, win 62727, options [mss 8961,sackOK,TS val 1425290709 ecr 0,nop,wscale 7], length 0
12:43:20.649648 IP 192.168.1.188.47250 > 192.168.1.115.3306: Flags [S], seq 945902876, win 62727, options [mss 8961,sackOK,TS val 1425291727 ecr 0,nop,wscale 7], length 0
12:43:22.665634 IP 192.168.1.188.47250 > 192.168.1.115.3306: Flags [S], seq 945902876, win 62727, options [mss 8961,sackOK,TS val 1425293743 ecr 0,nop,wscale 7], length 0
12:43:26.889674 IP 192.168.1.188.47250 > 192.168.1.115.3306: Flags [S], seq 945902876, win 62727, options [mss 8961,sackOK,TS val 1425297967 ecr 0,nop,wscale 7], length 0
12:43:35.081803 IP 192.168.1.188.47250 > 192.168.1.115.3306: Flags [S], seq 945902876, win 62727, options [mss 8961,sackOK,TS val 1425306159 ecr 0,nop,wscale 7], length 0
12:43:51.209876 IP 192.168.1.188.47250 > 192.168.1.115.3306: Flags [S], seq 945902876, win 62727, options [mss 8961,sackOK,TS val 1425322287 ecr 0,nop,wscale 7], length 0
^C
6 packets captured
6 packets received by filter
0 packets dropped by kernel

root@XXXXXXX:~# ufw status

Status: active

To                         Action      From
--                         ------      ----
Apache Full                ALLOW       Anywhere
3306                       ALLOW       127.0.0.1
3306                       ALLOW       192.168.1.106
22/tcp                     ALLOW       Anywhere
3306/tcp                   ALLOW       192.168.1.106
Apache Full (v6)           ALLOW       Anywhere (v6)

Are there any commands I can use to ensure that the NTP service is running and is also responsive?

What I am planning to do it have some monitory & remediation scrip to ensure that a couple of services are running and are responsive and especially NTP. And if the service is not running or is not responsive then have it restart the service or check again, and if it still fails for 3 times send an alert email.

Thanks in Advance!

I've two NFS shares mounted on the OS & I also have one CIFS share. none of the above mounts in fstab file have soft or hard explicitly mentioned in their respective mount options.

So how can I find out if they are soft mounts or hard?

I have created a group name "app-data" and a folder /db-data/archived-data/

I want members of app-data to have all rights on /db-data/ folder but I want the same group users have only create and delete access on /db-data/archived-data/ folder (users should not be able to modify any files or directories in it. but they should be able to create or delete any files or folders they want.

How can we do it. I think this is possible through ACL but please feel free to let me know how can we achive this? using any method I am fine but I want this configuration.

please help.

How to find details like whether the mounted file-system is read only or read-write?

In addition to it how to find details of the hard disk or partition health status without affecting the data of that mounted disk or partition?

How to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator (It can also be setup for non Google accounts)?

This question might look similar but I could not find a solution to this which covers all the below requirements of the policy, Hence please help me:

  - Incorrect pass lockout (after 3 incorrect attempts user shall be locked out for 10 mins)
  - Duration of lockout ( As mentioned in the above point i.e. 10 mins)
  - Minimum length (8)
  - Maximum length (32)
  - Complexity : Minimum 2 small letters
  - Complexity : Minimum 2 Capital letters
  - Complexity : Minimum 2 Numeric digits
  - Complexity : Minimum 2 Special characters
  - Password History ( Must not accept any of the last 10 passwords)
  - No reverse passwords (for ex: if earlier it was TesT@123$ then, it should not take $321@TseT)
  - No incremental passwords (for ex: if earlier it was TesT@123$ then, it should not take TesT@1234$ or TesT@456$ or TesT@234$, etc.. )
  - Must not accept any Dictionary words

Thanks in advance!!

After going through tons of websites I have understood a little about PAM authentication

Click here to view my /etc/pam.d/common-password file

Still it is not working giving few errors:

Click here to see auth logs:

I have tried heck of combinations but with no success

can someone help me fix where am I going wrong.

I need to increase the default java heap size to get OpenNMS Linkd service running smoothly, and fortunately I have 4/5 of my total installed memory free at any given time even when their is maximum load on the server. still java is not performing to it's bast. hence I need to increase the default java heap size.

Can anyone tell me how to do it?

I'm using Ubuntu 12.04 lts & total memory installed is 16 GB out of which generally 2GB to 4GB is used.

I have already checked below questions and they did not help me resolve my issue.

1. How to increase memory allocated to java? java.lang.OutOfMemoryError: Java heap space

2. Comparing Virtual Memory Size with Resident Size

3. How to increase memory allocated to java? java.lang.OutOfMemoryError: Java heap space

Please feel free to edit or comment for any additional details required.

It is wiered that I'm not able to reinstall unity-2d on my system.

I removed it as it was not ready to go into the 2D mode. I have XRDP install for which I need Unity-2D.

after removing the unity-2d as it was not working properly. I run below command and then rebooted system before trying to reinstall it.

apt-get -f purge unity-2d lightdm
add-apt-repository --remove ppa:unity-2d-team/unity-2d-daily
apt-get -f purge
apt-get -f remove
apt-get -f autoremove
apt-get -f remove
apt-get clean
apt-get autoclean
dpkg --configure -a
then rebooted the system using init 6

now I took the ssh of my system and then i reinstalled unity using below commands

apt-get -f install --reinstall lightdm
root@searce-OptiPlex-380-01:~# add-apt-repository "deb http://ppa.launchpad.net/unity-2d-team/unity-2d-daily/ubuntu trusty main"
root@searce-OptiPlex-380-01:~# add-apt-repository "deb-src http://ppa.launchpad.net/unity-2d-team/unity-2d-daily/ubuntu trusty main"
Error: 'deb-src http://ppa.launchpad.net/unity-2d-team/unity-2d-daily/ubuntu trusty main' invalid
root@searce-OptiPlex-380-01:~# add-apt-repository ppa:unity-2d-team/unity-2d-daily

To install Unity 2D, type the following commands in a terminal:

$ sudo add-apt-repository ppa:unity-2d-team/unity-2d-daily
$ sudo apt-get update
$ sudo apt-get install unity-2d

This will install all of the necessary dependencies to run Unity 2D, including a "Unity 2D" session that you'll need to login with.

Then do the following:  * log out  * log back in and choose the "Unity 2D" session in the drop-down menu at the bottom of the login screen  * you will then be running Unity 2D

More info: https://launchpad.net/~unity-2d-team/+archive/unity-2d-daily Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmpe819_z9n/secring.gpg' created
gpg: keyring `/tmp/tmpe819_z9n/pubring.gpg' created
gpg: requesting key E32DD113 from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpe819_z9n/trustdb.gpg: trustdb created
gpg: key E32DD113: public key "Launchpad PPA for unity-2d-team" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
OK

then when I ran apt-get update everything goes well except 2 things below:

1) Hit http://archive.ubuntu.com trusty-backports/main Sources Err http://ppa.launchpad.net trusty/main amd64 Packages 404 Not Found Hit http://archive.ubuntu.com trusty-backports/restricted Sources Hit http://archive.ubuntu.com trusty-backports/universe Sources Err http://ppa.launchpad.net trusty/main i386 Packages 404 Not Found

2)

Ign http://archive.ubuntu.com trusty-proposed/universe Translation-en_IN W: Failed to fetch http://ppa.launchpad.net/unity-2d-team/unity-2d-daily/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/unity-2d-team/unity-2d-daily/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead. root@searce-OptiPlex-380-01:~#

above errors stared coming after I imported the PPA file of unity-2d, before that it was not there, still tried to reinstall unity-2d using below commands:

root@searce-OptiPlex-380-01:~# apt-get -f reinstall unity-2d
E: Command line option 'f' [from -f] is not known.
root@searce-OptiPlex-380-01:~# apt-get -f install unity-2d
Reading package lists... Done
Building dependency tree
Reading state information... Done
unity-2d is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
root@searce-OptiPlex-380-01:~# restart lightdm
lightdm start/running, process 2926
root@searce-OptiPlex-380-01:~# 

didn't see any error while installing but even after restarting the lightdm or even after rebooting the system I am not able to see the unity-2d option at the login screen nor it is working in XRDP. Also I do not see any menu or Icons when I login to the system physically or over XRDP.

can anyone help me. Thanks in advance.

I have a non-admin user in Ubuntu 12.04 LTS desktop 32-bit OS to whom I need to give permissions only to access /var/log as he needs to monitor logs and create reports related to it.

I do not want to give him admin access at any cost.

How can I achieve this?

So can anyone help me to configure below 3 points on client side where we have SNMP Service installed?

Litle bit of background:
We have one OpenNMS Monitoring server, which monitors all other servers in our organization. since last few days we have a requirement to monitor below points on all ubuntu servers. (As all linux servers are ubuntu in our organization.)

1. History of all the commands used or tried (history of every users cli) by any user with basic information. (Like username, complete command, date and time command was used,whether it was successful or not, etc.)

2. List of users who have not logged in to the server since last 10 days.

3. list of users who's passwords are locked out or auth keys are expired.

Now OpenNMS monitors all servers using snmp & snmp traps.

Please feel free to ask in case any further information is required. Thanks in advance.

Some additional information about OpenNMS Server we have:
OpenNMS Web Console
Version: 1.10.10
Server Time: Tue Aug 06 13:14:21 IST 2013
Client Time: Tue Aug 06 2013 13:12:57 GMT+0530 (India Standard Time)
Java Version: 1.6.0_27 Sun Microsystems Inc.
Java Virtual Machine: 20.0-b12 Sun Microsystems Inc.
Operating System: Linux 3.5.0-23-generic (amd64)
Servlet Container: jetty/7.5.1.v20110908 (Servlet Spec 2.5)
User Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36
Database Type: PostgreSQL
Database Version: 9.1.9

Here is the scenario:

• We have one AWS Ubuntu server Server
• This server is working as ftp client
• Now when we try to connect to XYZ companies ftp server using this AWS server as client, it is sending it's local LAN IP while connecting to the ftp server, because of which listing of directories does not work.
• Log shows that we are connected to the FTP server + we are authenticated correctly... port listing goes successful + only directory listing fails.
• we can provide specific IP in FTP using filezilla which it will use while going out of the gateway.
• here we can't use that because it does not have GUI & it is going to be used by a php script.
• This problem was also there in windows at that time we solved it by giving a elastic IP to FileZilla. before the solution we used to receive the error & log showed like This. this point is added just to give you more details. & it's the same issue with Ubuntu & we want to give a elastic IP somewhere in ftp so that it will start working... we hope so at least. ;)

Recent updates

• please click here for vsftpd.conf file.

• little more clarification :

  In this case machine "A" is our FTP Server (which is AWS Ubuntu server) for internal usage, because of the lot of other process and data which is regularly uploaded on this FTP Server (Machine "A") & Machine "B" is our client's FTP Server which they use for their internal purposes. Now we need to pull some data from our clients FTP Server (i.e. Machine "B") to our server (i.e. Machine "A") and then process it. after that we need to put the processed data back on to the client's FTP Server (i.e. Machine "B"). that's what is not working

• Logs of clients firewall when we tried to connect with machine "B" as shown in below image.

When you try to connect to mongodb it is giving a following error:

root@ip-10-87-37-28:~# mongo MongoDB shell version: 2.0.4 connecting to: test Fri Mar 8 07:40:11 Error: couldn't connect to server 127.0.0.1 shell/mongo.js:84 exception: connect failed

however it is not giving any error while starting the mongodb service.

To go through mongodb log please click here.

Please feel free to ask if any of you need any other information. Thanks in advance.

please click here for the update log file.

I have just started the three MongoDB replica servers.

• I do not understand what is this screw value what it should be on which server?
• Which values should I monitor

• I have taken 2 screenshots shown below for Primary Mongo DB Server, Secondary Mongo DB Server & Arbiter Mongo DB Server respectively.

             ## Primary Mongo DB Server --- Location : Singapore ##
  

  

         ## Secondary Mongo DB Server --- Location : North Virginia ##
  

  

             ## Arbiter Mongo DB Server --- Location : Singapore ##
  

  

As far as I understand they are in sync very well and all of them are AWS Instances.

1. I need to know how and what should I monitor?
2. What kind of maintenance activities should I do & how?

Please feel free to let me know if you need any further info. Thanks in advance!!

Installing Roundcube Web Server, gave date and time error while checking PHP configuration. I am trying to configure the webamil using roundcube. Below is the details.

1. pop / smtp service is working fine on my mail server.
2. Able to send and receive mails through the mail client perfectly fine.
3. Using plain text authentication.
4. SSL or TLS is not used in mail server.
5. Roundcube version: roundcubemail-0.8.5
6. PHP Version: PHP 5.3.10
7. Need to set timezone settings to Asia/Kolkata

I have checked this link and on thing I could understand out of it is that I need to modify the php.ini/.htaccess or just /.htaccess but could not find the /.htaccess in the installation folder of roundcube second I could find the php.ini/.htaccess @ /usr/local/lib/php.ini ... where I already modified it to date.timezone = "Asia/Kolkata" and restarted appache2 service still roundcube installation page shows below error.

Below is the complete page with the error in bold: Roundcube Webmail Installer

Check environmentCreate configTest config
Checking PHP version

Version: OK(PHP 5.3.10-1ubuntu3.5 detected)
Checking PHP extensions

The following modules/extensions are required to run Roundcube:

PCRE: OK
DOM: OK
Session: OK
XML: OK
JSON: OK
The next couple of extensions are optional and recommended to get the best performance:

FileInfo: OK
Libiconv: OK
Multibyte: OK
OpenSSL: OK
Mcrypt: OK
Intl: OK
Exif: OK
Checking available databases

Check which of the supported extensions are installed. At least one of them is required.

MySQL: OK
MySQLi: OK
PostgreSQL: NOT AVAILABLE(Not installed)
SQLite (v2): NOT AVAILABLE(Not installed)
Check for required 3rd party libs

This also checks if the include path is set correctly.

PEAR: OK
MDB2: OK
Net_SMTP: OK
Net_IDNA2: OK
Mail_mime: OK

Checking php.ini/.htaccess settings

The following settings are required to run Roundcube:

file_uploads: OK
session.auto_start: OK
zend.ze1_compatibility_mode: OK
mbstring.func_overload: OK
suhosin.session.encrypt: OK
magic_quotes_runtime: OK
magic_quotes_sybase: OK
*date.timezone: NOT OK(empty value detected) * The following settings are optional and recommended:

allow_url_fopen: OK
Sorry but your webserver does not meet the requirements for Roundcube!
Please install the missing modules or fix the php.ini settings according to the above check results.
Hint: only checks showing NOT OK need to be fixed.

Installer by the Roundcube Dev Team. Copyright © 2008-2012 – Published under the GNU Public License; Icons by famfamfam`

Below is what I know:

I have to add this below line in sudoers file to give rights to the user for particular task.

user_name ALL=NOPASSWD: /usr/bin/apt-get install

In this case I want to give access to this user to restart 2 services (i.e. Apache and MySQL) with all install rights.

Using the above line, I have given him all install rights, now do I have to add same line two more times to give the rights for services? Or can I just add those commands in the same line, separated by comma or something?

I have ESXi 5.0 installed and when I am installing Ubuntu Server 12.04 LTS (32 bit) it is giving an error saying grub installation failed

Here is a screenshot of the error:

1. I have other Ubuntu servers running fine on this esxi server, so I don't think problem is with ESXi.
   
2. I have 32 GB of ram spare on this ESXi and have given 2 GB of RAM to this 12.0 LTS VM.
3. I have allocated 2 processor cores.
4. I have tried supplying different ISO Image to this VM as I thought the 1st image that I downloaded has errors. But that's definitely not the case as all 3 different ISO images that I downloaded of Ubuntu server 12.04 LTS (32-bit) can't be corrupt!
5. Just to make sure that the Image does not have problem I used that Image to install it for testing on stand alone system. it works fine there!
6. This is a production ESXi server which I can't play with, however I can play with the Ubuntu Server 12.04 LTS (32-Bit) VM that we have created on that ESXi.
   

Here is more information for another attempt:

• For this install, I've given 1 core of the XENON processor, 1 GB of RAM and 20 GB of HHD.

• I have used LVM with the automatic partition manager (where I do not have to create partitions manually).

• I do not have any working Ubuntu 12.04 LTS image installed anywhere. :(

• I tried installing Ubuntu 12.10 on the same VM which worked well, however that is of no use to me as I need Ubuntu 12.04 LTS only for testing purpose.

Please let me know if you need any further details. 

I need help on this as soon as possible, as the go live date of this server is really close.

I have installed curl-7.27.0 and it is working fine. However, when I run curl -V, I get:

curl 7.21.6 (i686-pc-linux-gnu) libcurl/7.21.6 OpenSSL/1.0.0e zlib/1.2.3.4 libidn/1.22 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap pop3 pop3s rtmp rtsp smtp smtps telnet tftp
Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz

How do I enable SFTP protocol?

I've completed the following steps:

1. I have configured Ubuntu server with Key authentication and it is working fine.
2. I have disabled password authentication for key authentication to work.
3. The server is always accessed via remote terminals or putty.

Now all user accounts are able to log in with the authentication key and pass phrase, but now I want to create only one new user without key authentication. So how should I go about it?

On the other hand, this should not hamper other users who are using key authentication.

when I am trying to access the server through ssh it says:

ssh: connect to host xx.yyy.zzz.x port 22: Connection refused

and on the server in auth.log it shows following log entry:

Address xx.yyy.zzz.x maps to xx.yyy.zzz.x.static-pune-vsnl.net.in, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!

I have created a user account for that user and it is also in enabled status.

Requested info

1. It is Ubuntu 11.10
2. It is configured as SSH Server using openssh-server
3. I am trying to connect to this server using Putty from Windows 7 i.e. My Desktop
4. I have also asked this in superuser as per the request of @zpletan and link to that question is given below.

https://superuser.com/questions/408080/unable-to-access-the-server-via-ssh

Thanks in advance.