*nix script snippets that are useful/clever

For the record – these are lookups – NOT my creations. I will add more as I go #Backup & clear history DATE=`date +%Y%m%d-%H%M` mv ~/.zsh_history{,.$DATE} cat /dev/null > ~/.zsh_history #HDD space (without clutter) df -h | grep -v “tmp\|udev” #send contents into a file (you need to \escape any \$variables within the CONTENTS+COMMANDS) cat