GNU/Linux cheat sheet

See here.

ccrypt to encrypt files

If you need to encrypt a file which contains personal data, you can use ccrypt. It's not installed by default on ubuntu so you'll have to do a:

sudo apt-get install ccrypt
but once done you can encrypt your file using

ccrypt -e filename
and decrypt using

ccrypt -d filename

How much RAM do I have on my GNU/Linux machine?

free -m
For a result like this
total used free shared buffers cached
Mem: 1899 1273 626 0 17 858
-/+ buffers/cache: 397 1502
Swap: 5561 23 5538

From gtk-recordmydesktop to youtube in one line

It's good to be back to being a GNU/Linux and in particular Ubuntu, home user.

When you record your screencast using gtk-recordmydesktop the ouput is an ogg file. Your file still needs to meet the needs of youtube if you are to vodcast. For this you will need a line like this....

mencoder oo1.ogg -oac mp3lame -ovc lavc -ofps 30 -vf scale=320:240 -o oo1.mpg

If you don't have mencoder, then you can install it using:

sudo apt-get install mencoder