Commands by jdunn (5)

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purge installed but unused linux headers, image, or modules
will purge: only installed apps: /^ii/!d avoiding current kernel stuff: /'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d using app names: s/^[^ ]* [^ ]* \([^ ]*\).*/\1/ avoiding stuff without a version number: /[0-9]/!d

Tells you where a command is in your $PATH, but also wether it's a link and to what.
You may also use the $(which foo) variant instead of backticks. I personnaly have an alias ll='ls -l'.

Grab the first 3 octets of your ip addresses
For machines that have many ip blocks spanning different Class C's, this will show which ones.

top 10 commands used

See KeepAlive counters on tcp connections
See connection's tcp timers

Randomize lines in a file
Works in sort (GNU coreutils) 7.4, don't know when it was implemented but sometime the last 6 years.

Gets the X11 Screen resolution
Requires xrandr, grep and, sed.

List your largest installed packages.
Requires the "wajig" package to be installed.

Use top to monitor only all processes with the same name fragment 'foo'
top accecpts a comma separated list of PIDs.

Launch firefox on a remote linux server
Actually 'firefox' is a script that then launches the 'firefox-bin' executable. You need to specify the 'no-remote' option in order to launch remote firefox instead of your local one (this drove me crazy time ago)


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