Commands by knoppix5 (45)

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Remove a range of lines from a file

Clear ARP table in linux.
Clears the "arp" table, without entering manually addresses (tested in Ubuntu).

Check if the files in current directory has the RPATH variable defined
Using gentoo prefix portage I got in a situation where some packages did not contain the needed RPATH variable. This command helped me to find out which ones I should recompile

Randomly run command
Randomly decide whether to run a command, or fail. It's useful for testing purposes. . Usage: ran PERCENTAGE COMMAND [ARGS] Note: In this version the percentage is required. . This is like @sesom42 and @snipertyler's commands but in a USABLE form. . e.g. In your complicated shell script, put "ran 99" before a crucial component. Now, it will fail 1% of the time allowing you to test the failure code-path. $ ran 99 my_complex_program arg1 arg2

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

A nice way to show git commit history, with easy to read revision numbers instead of the default hash

Inverted cowsay
It's quite fun to invert text using "" (ref: ). Slightly more challenging is to flip a whole "cowsay". :-)

list block devices
Shows all block devices in a tree with descruptions of what they are.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

List detailed information about a ZIP archive
list zipfile info in long Unix ``ls -l'' format.

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