Cleanup logfiles

shopt -s globstar && rm **/*.log

Cleanup RVM

The hard way (remove all gems):

$ rvm all-gemsets do gem cleanup

Remove stale source files and archives and other obsolete stuff:

$ rvm cleanup all

To avoid duplicate gems enable the gem cache:

$ rvm gemset globalcache enable

Find all tmp folders in actual directory and delete their content (but keep dotfiles)

find ./ -type d -name "tmp" -execdir rm -rf tmp/* \;