The Joy of Penguins : Linux System Administration

Linux System Administration

SSH - Secure Shell

SSH

Linux uses the package OpenSSH

The client is ssh.
The server is sshd.

You can use the network services to turn sshd on and off:

            [root@Hamming ~]# service sshd stop
            Stopping sshd:                                             [ OK ]

            [root@Hamming ~]# chkconfig sshd off
            [root@Hamming ~]# chkconfig --list | grep ssh
            sshd            0:off   1:off   2:off   3:off   4:off   5:off   6:off

OpenSSH supports two protocols : 1 and 2.

Version 2 is usually the default.

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