Superuser login issue after changing shell to ssh

cr27 · 12-09-2017, 12:05 AM

I wanted to change my Fedora shell to ssh.
I used the chsh command and then gave the address /bin/ssh. Logout the superuser. But after login as su, I am unable to login and getting this issue:-

/*Issue*/
<pre>usage: ssh [-1246AaCfGgKkMNnqsTtVvXxYy] [-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]]
[user@]hostname [command]</pre>

//The terminal echoes current shell as bash.

MadeInGermany · 12-09-2017, 03:34 AM

ssh is a ssl-secured remote shell invocation utility, not a login shell!
Login shells are sh,bash,ksh,zsh,ash,dash,...
Most LUnix have a list of the allowed login shells in /etc/shells, that prevents picking a wrong shell.

Looks like you have locked out root.
You can try

Code:

sudo chsh

and change to /bin/sh
If that fails you need to boot a rescue system.

username_11011 · 12-09-2017, 08:45 AM

Path to file with default user shells:

Code:

/etc/passwd

You'll find the following line (or similar):

Code:

root:x:0:0::/root:/bin/ssh

Change that to:

Code:

root:x:0:0::/root:/bin/bash

P.S., if you *really* want to use ssh as your default shell (not sure why, ssh is for logging in to shells on other machines on a network), you can ssh to your local machine by using ssh like this:

Code:

ssh root@127.0.0.1

However, ssh will use root's default shell as it's default shell. I'm confused. Maybe you meant "/bin/sh"??

giis · 12-14-2017, 10:35 AM

Can you share the exact command you tried?