great commands

remove_gems

great commands.

remove all gems from a gemset:
gem list | cut -d" " -f1 | xargs gem uninstall -aIx

find a pattern inner files:
find / -type f -print0 | xargs -0 grep -i pattern

change encoding of files:
iconv -f ISO-8859-1 -t UTF-8 EncodeFrom.java > EncodeTo.java

delete all files recursively from a folder:
find . -name \*.ext -type f -delete

Vim
:map <C-m> i<CR><Esc>h

Mac OSX:
killall Finder
defaults write com.apple.LaunchServices LSQuarantine -bool NO // Sem confirmação para abrir arquivos obtidos por download