Commands using mailx (8)

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list files recursively by size

Read funny developer comments in the Linux source tree
These are way better than fortune(6).

format txt as table not joining empty columns
-n switch keeps empty columns If your distribution does not ship with a recent column version that supports -n you can use this alternative: perl -pe 's/(^|;);/$1 ;/g' file.csv | column -ts\; | less -S Change the delimiter to your liking.

Change your swappiness Ratio under linux
This command allow you to set the swappiness var at 50 (default is 60). The value interval must be set between 0 and 100. If swappiness is high=Swap usage is high, if swappiness is low=Ram usage is high.

List the binaries installed by a Debian package
GNU grep's perl-compatible regular expression(PCRE).

Find the package that installed a command

sudo for launching gui apps in background
Need package: gksu Note: Launching gui app in background that needs sudo, won't work great with our old friendly style of launching: $ sudo gedit /etc/passwd & because this would put sudo in background ! Using gksudo as demonstrated, would popup a gui sudo window. May be this is a common knowledge, but not knowing this frustrated me during my newbie year.

Twitpic upload and Tweet

What is my ip?

ubuntu tasksel
The command tasksel allows the choice of packages from the command line to get predefined configurations for specific services (usually this option is offered during installation).


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