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grep certain file types recursively
-exec works better and faster then using a pipe

Rename files in batch

Convert encoding from cp1252 (MS Windows) to UTF-8 on source code files

re-assign line numbers

Generate random valid mac addresses
Ruby version. Also, a perl version: $perl -e 'printf("%.2x.",rand(255))for(1..5);printf("%.2x\n",rand(255))'

Show CPU usage for EACH cores

Show top running processes by the number of open filehandles they have
I think I could cut down the number of pipes here, any suggestions?

Get the absolute path of a file

Convert ascii string to hex
If you're going to use od, here's how to suppress the labels at the beginning. Also, it doesn't output the \x, hence the sed command at the end. Remove it for space separated hex values instead

Stop All Wine Apps and Processes
kills all wine running apps and processes. Make a hotkey for it when running wine games in fullscreen and it locks. This is a great way to escape from it.


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