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Persistent SSH sessions

ryan — Thu, 13 Mar 2008 03:41:47 +0000

The screen program, among other useful things, lets you keep an SSH session running even after you disconnect from SSH. Here’s how to use it.

SSH in.

ssh user@hostname.com

Once on the remote machine, set up a named screen:

screen -S myscreen

In another terminal, open another SSH connnection and start another screen:

screen -S mysecondscreen

You can see they are there by using, in either of the terminals,

screen -ls

This does NOT start screen, just lists the different screens.

You can now disconnect the SSH connections. When you reconnect, you can use

screen -r myscreen

screen -r mysecondscreen

to reconnect to the one you want.

ryan — Thu, 13 Mar 2008 03:25:49 +0000

Some easy ways to configure SSH to be a little more secure:

Edit /etc/ssh/sshd_config as root.

ryan — Thu, 13 Mar 2008 03:20:41 +0000

Easy way to add public key of this machine to a remote machine:

ssh-copy-id -i ~/.ssh/id_dsa.pub root@fileserver01

ryan — Wed, 09 Jan 2008 20:42:28 +0000

sudo vim /etc/ssh/sshd_config

ryan — Wed, 09 Jan 2008 20:42:04 +0000

sudo /etc/init.d/ssh restart

ryan — Mon, 10 Dec 2007 20:37:45 +0000

cat /var/log/auth.log | grep sshd

To check the zipped ones, use

zcat /var/log/auth.log.1.gz | grep sshd