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Mirror rubygems.org
https://github.com/rubygems/rubygems-mirror/issues/20

Binary clock
cryptic version

Match a URL
For the record: I didn't build this. Just shared what I found that worked. Apologies to the original author! I decided I should fix the case where http://example.com is not matched for the next time I need this. So I read rfc1035 and formalized the host name regex. If anyone finds any more holes, please comment.

Get own public IP address
Returns your external IP address to the command line using only wget

Parse m3u playlist file for total time
Parse an m3u file with seconds for each item and output the length of the entire playlist

Comment out a line in a file
This will comment out a line, specified by line number, in a given file.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Multi-thread any command
For instance: $ find . -type f -name '*.wav' -print0 |xargs -0 -P 3 -n 1 flac -V8 will encode all .wav files into FLAC in parallel. Explanation of xargs flags: -P [max-procs]: Max number of invocations to run at once. Set to 0 to run all at once [potentially dangerous re: excessive RAM usage]. -n [max-args]: Max number of arguments from the list to send to each invocation. -0: Stdin is a null-terminated list. I use xargs to build parallel-processing frameworks into my scripts like the one here: http://pastebin.com/1GvcifYa

rot13 simple substitution cipher via command line
E.g. Useful for hiding spoilers in reviews, etc.

Open Remote Desktop (RDP) from command line having a custom screen size
This example uses xfreerdp, which builds upon the development of rdesktop. This example usage will also send you the remote machine's sound.


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