Here’s an example setup to create SSH host shortnames. On you local computer, add the following to ~/.ssh/config:

Host server1
HostName server1.internet.com
User david

Host server2
HostName server2.internet.com
User david

Host *
User davidwinter

Now with this file saved, you can ssh into server2.internet.com with just the following command:

ssh server2

This will save you having to type out:

ssh david@server2.internet.com

And if you have public key authentication setup, it makes the process even smoother. Adding the wildcard host record at the bottom allows you to specify a default username to use for other servers to the ones you’ve not specified above.

Fed up with having to type your password in each time you log into a server over SSH? Me too. Down with passwords, and in with public key authentication!

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sudo update-rc.d -f script_name remove

To merge video files together with mencoder is simple:

mencoder -oac copy -ovc copy file1.avi file2.avi file3.avi -o full_movie.avi