Gnijuohz's questions

My computer suddenly shut down a few times when I was using Ubuntu and then I couldn't even boot into Windows or Ubuntu. It's a dual boot computer and I installed Ubuntu from Windows with Wubi.

When I tried to boot into Ubuntu it said that

Errors were found while checking the disk drive for /

I search online and found that the command

mount -o remount, rw /

I tried it but only sometimes it worked and even then the computer then shut down suddenly...

And when it didn't work. The following message was shown:

/host: device is busy

/run: device is busy

/dev: device is busy

But I could boot into Ubuntu once and used boot-repair to generate a report.(Now I can't seem to be able to boot into Ubuntu anymore) It's here.

When I tried to boot into Windows, it just got stuck at the Windows logo screen. And after a while it suddenly shut down.

So based on the report, what's the problem? Is it possible to fix the problem within Ubuntu if I got lucky again and boot into it?

Thanks!

I tried to use github so I followed the help doc. But when I used this command : ssh -vT [email protected] I got error like this:

jacos@Jing:~/.ssh$ ssh -vT [email protected]
OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011
debug1: Reading configuration data /home/jacos/.ssh/config
debug1: Applying options for github.com
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to ssh.github.com [207.97.227.248] port 443.
debug1: Connection established.
debug1: identity file /home/jacos/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/jacos/.ssh/id_rsa-cert type -1
debug1: identity file /home/jacos/.ssh/id_dsa type -1
debug1: identity file /home/jacos/.ssh/id_dsa-cert type -1
debug1: identity file /home/jacos/.ssh/id_ecdsa type -1
debug1: identity file /home/jacos/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5github2
debug1: match: OpenSSH_5.1p1 Debian-5github2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-7ubuntu1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48
debug1: Host '[ssh.github.com]:443' is known and matches the RSA host key.
debug1: Found key in /home/jacos/.ssh/known_hosts:4
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/jacos/.ssh/id_rsa
debug1: Remote: Forced command: gerve gnijuohz 54:da:c2:c1:ca:4a:b9:4d:21:10:5b:42:3f:5a:8e:f7
debug1: Remote: Port forwarding disabled.
debug1: Remote: X11 forwarding disabled.
debug1: Remote: Agent forwarding disabled.
debug1: Remote: Pty allocation disabled.
debug1: Server accepts key: pkalg ssh-rsa blen 279
Agent admitted failure to sign using the key.
debug1: Trying private key: /home/jacos/.ssh/id_dsa
debug1: Trying private key: /home/jacos/.ssh/id_ecdsa
debug1: No more authentication methods to try.
Permission denied (publickey).

Agent admitted to sign using the key? No more authentication methods to try?

Can someone explain what's wrong here?

Thanks.

I tried to use set up git and use it for github, then when I followed the help doc, but when I got to step 5 of the set up ssh keys section :Test everything out , When I used this command: ssh -T [email protected] I got an error:

ssh: connect to host github.com port 22: No route to host

Then I used this command:

ssh -vT [email protected]

Here is what I got:

OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011
debug1: Reading configuration data /home/jacos/.ssh/config
debug1: Applying options for github.com
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to github.com [207.97.227.239] port 22.
debug1: connect to address 207.97.227.239 port 22: No route to host
ssh: connect to host github.com port 22: No route to host

I googled for a while and found I have to check if the iptables blocked the port. So here is the result:

~$ sudo /sbin/iptables -L -n
[sudo] password for jacos: 
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpt:67 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:67 
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpt:53 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:53 

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            10.42.43.0/24       state RELATED,ESTABLISHED 
ACCEPT     all  --  10.42.43.0/24        0.0.0.0/0           
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-port-unreachable 
REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-port-unreachable 
Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

And I tried the command suggested by Gilles:

tcptraceroute github.com 22

Here is what I got:

Selected device eth0, address 222.20.58.XX(sorry...I masked part of my ip), port 33281 for outgoing packets
Tracing the path to github.com (207.97.227.239) on TCP port 22 (ssh), 30 hops max
 1  222.20.58.254  0.891 ms  0.850 ms  0.693 ms
 2  zxq-xs-h3c7510e.hust.edu.cn (115.156.255.137)  1.253 ms  1.569 ms  2.837 ms
 3  zxq-xs-rjs8606.hust.edu.cn (115.156.255.130)  0.729 ms  0.678 ms  0.629 ms
 4  115.156.255.174  0.794 ms  6.279 ms  16.569 ms
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *
16  * * *
17  * * *
18  * * *
19  * * *
20  * * *
21  * * *
22  * * *
23  * * *
24  * * *
25  * * *
26  * * *
27  * * *
28  * * *
29  * * *
30  * * *
Destination not reached

It seems that the route is stopped at 115.156.255.174, which I don't know where it is.

I can't figure out what it means. Does it block port 22?

By the way, I can access the Internet and visit github.com. And I am using Ubuntu 11.10.

Can anyone help with this? Thanks!