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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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Remove Thumbs.db files from folders
An alternative which uses the advanced zsh globbing (pattern matching)

Get a list of IP Addresses that have failed to login via SSH
This command shows a sorted list of the IP addresses from which there have been authentication errors via SSH (possible script kiddies trying to gain access to your server), it eliminates duplicates so it's easier to read, but you can remove the "uniq" command at the end, or even do a "uniq -c" to have a count of how many times each IP address shows in the log (the path to the log may vary from system to system)

Twitpic upload and Tweet

Jump to a directory, execute a command and jump back to current dir

Set pcap & SUID Bit for priv. network programs (like nmap)

Create test images
Useful to test programs and webpages.

list files recursively by size

Speed up launch of liferea
If you use liferea frequently, you will see obvious speedup after you executed this command.

Random quote from Borat
I improved a bit on the original by only using sed and extracting the quote with a matching group. Use -nE for sed on Mac OSX Use -nr for sed on Linux. Warning! The quotes from Borat are definitely offensive.

Check if your webserver supports gzip compression with curl


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