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Display the top ten running processes - sorted by memory usage

Display the size of all your home's directories
Display the size (human reading) of all the directories in your home path (~).

Query Wikipedia via console over DNS
Shorter version, works with multiple words.

Lets Tux say the random fact. [add it to .bashrc to see it in new terminal window]

Convert (almost) any video file into webm format for online html5 streaming

Creates PodFeeds.txt, a file that lists the URLs of rhythmbox podcasts from the rhythmdb.xml file.
The first grep any line with pod-feed in it plus the following five lines. The second grep throws out any line not containing . sed removes the leading four spaces then and the trailing . Using a colon as sed's separating character avoids having to escape the /. Works ok with Mythbuntu 9.04 (used mostly as a three line bash script).

Save history without logout
You can use commands that executed on first console from new opened second console. Sometimes it be very useful :)

Validate all XML files in the current directory and below
If everything validates, there's no output. Can be handy to run on a cron job set up to email output.

shuffle lines via perl
Same, without modules... Probably smarter option: just use the shuf command or even sort -R.

Easy way to scroll up und down to change to one of n last visited directories.
This alias is meant to append n (here is n=10) most recently used cd commands to the bottom of history file. This way you can easily change to one of previous visited directories simply by hitting 1-10 times arrow up key. Hint: You can make more aliases implying the same rule for any set of frequently used long and complex commands like: mkisof, rdesktop, gpg...


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