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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 20 biggest directories on the current filesystem
This command will tell you the 20 biggest directories starting from your working directory and skips directories on other filesystems. Useful for resolving disk space issues.

Install pip with Proxy
Installs pip packages defining a proxy

Show an application's environment variables

List the most recent dates in reverse-chronological order
bash brace expansion, sequence expression

Rsync using SSH and outputing results to a text file
--delete will delete copies on remote to match local if deleted on local --stats will output the results -z zip -a archive -A preserve ACL -x don't cross filesystem boundaries -h human readable -e specify the remote shell to use

Query well known ports list
Uses the file located in /etc/services

list files recursively by size

Quick and dirty RSS
runs an rss feed through sed replacing the closing tags with newlines and the opening tags with white space making it readable.

Determine configure options used for MySQL binary builds
Output is from Debian Lenny

Number of CPU's in a system
This appears to do the same. Utility is verified to be present on Ubuntu and OpenSuse out-of-the-box.


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