[SOLVED] SSH still using old hostname. How to change it for good?

sudoku · 2013-08-11 06:33:47

Hello!

I cannot understand how to have SSH use my laptop's new hostname.

My laptop's hostname is:

$ hostname
tpad

However, if I try to ssh from the Eeepc:

$ ssh user1@tpad
ssh: Could not resolve hostname tpad: Name or service not known

But if I connect to the old hostname:

$ ssh user1@sudoku
Welcome to tpad!
...

Where sudoku was my old hostname. Where does Arch go and find that hostname? I thought I got rid of it. Here are my relevant files:

$ cat /etc/hostname 
tpad
$ cat /etc/hosts 
127.0.0.1	localhost.localdomain	localhost tpad
::1		    localhost.localdomain	localhost tpad
# EOF
$ cat /etc/idmapd.conf
[General]
Verbosity = 1
Pipefs-Directory = /var/lib/nfs/rpc_pipefs
Domain = tpad

[Mapping]
Nobody-User = nobody
Nobody-Group = nobody

Thank you and all the best!

Last edited by sudoku (2013-08-11 07:54:44)

jasonwryan · 2013-08-11 06:50:04

Have you changed the Host field in .ssh/config?

sudoku · 2013-08-11 06:59:54

Do you mean ~/.ssh in the host machine (tpad/sudoku)? There is no config file:

$ ls ~/.ssh
authorized_keys  id_rsa.pub  known_hosts
$ grep -r -i sudoku ~/.ssh
./known_hosts:sudoku ecdsa-sha2-nistp256 [some very long string here]
./id_rsa.pub:ssh-rsa [another very long string here] user1@sudoku

Otherwise, if you mean /etc/ssh:

$ ls /etc/ssh
moduli       ssh_host_dsa_key      ssh_host_ecdsa_key.pub  ssh_host_rsa_key      sshd_config~
ssh_config   ssh_host_dsa_key.pub  ssh_host_key            ssh_host_rsa_key.pub
ssh_config~  ssh_host_ecdsa_key    ssh_host_key.pub        sshd_config

A grep -r -i sudoku /etc/ssh finds occurrences in all files here apart from ssh_config and sshd_config.

Last edited by sudoku (2013-08-11 07:04:47)

jasonwryan · 2013-08-11 07:01:25

You can create one, or delete your known_hosts. I'd opt for the former, myself...

sudoku · 2013-08-11 07:08:42

I've removed the ~/.ssh folder.

However, it didn't solve much and I still have to SSH using sudoku although now it's asking me for a password.

Nothing changed by reinstalling openssh and removing /etc/ssh either. Where does Archlinux find that hostname?

Last edited by sudoku (2013-08-11 07:20:26)

jasonwryan · 2013-08-11 07:39:13

You shouldn't indiscriminately remove those directories...

Create a .ssh/config on your EeePC with the following in it:

Host tpad
   Hostname 192.168.1.XXX
   Port 22
   User user1
   IdentityFile ~/.ssh/id_rsa

where the values for the IP address, port and private key are yours, etc...

Then issue:

ssh tpad

sudoku · 2013-08-11 07:54:24

Ah! It worked. So it was actually some leftover setting in the Eeepc. Thank you for your help.

Arch Linux

#1 2013-08-11 06:33:47

[SOLVED] SSH still using old hostname. How to change it for good?

#2 2013-08-11 06:50:04

Re: [SOLVED] SSH still using old hostname. How to change it for good?

#3 2013-08-11 06:59:54

Re: [SOLVED] SSH still using old hostname. How to change it for good?

#4 2013-08-11 07:01:25

Re: [SOLVED] SSH still using old hostname. How to change it for good?

#5 2013-08-11 07:08:42

Re: [SOLVED] SSH still using old hostname. How to change it for good?

#6 2013-08-11 07:39:13

Re: [SOLVED] SSH still using old hostname. How to change it for good?

#7 2013-08-11 07:54:24

Re: [SOLVED] SSH still using old hostname. How to change it for good?

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