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commandlinefu.com 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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Find the ratio between ram usage and swap usage.
it provides the ratio used for the RAM and The SWAP under Linux. When swappiness is high, Swap usage is high. When swappiness is low, Ram usage is high.

Show OS release incl version.

List manually installed packages (excluding Essentials)

Compare two CSV files, discarding any repeated lines
The value for the sort command's -k argument is the column in the CSV file to sort on. In this example, it sorts on the second column. You must use some form of the sort command in order for uniq to work properly.

copy partition table from /dev/sda to /dev/sdb

Stop Flash from tracking everything you do.
Brute force way to block all LSO cookies on a Linux system with the non-free Flash browser plugin. Works just fine for my needs. Enjoy.

Exclude svn directories with grep
exclude-dir option requires grep 2.5.3

Watch active calls on an Asterisk PBX
Works on asterisk 1.8.

Get your internal IP address and nothing but your internal IP address
Will return your internal IP address.

Use tcpdump to monitor all DNS queries and responses


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