[BASH] Add folder to $PATH if not there already

if [[ ":$PATH:" != *":/some/folder:"* ]]; then PATH=${PATH}:/some/folder; fi

Bash: remove zero sized files

find . -type f -size 0k -exec rm {} \; | awk '{ print $8 }'

Bash comparision

-eq - equals -ne - not equal -lt - less than -le - less or equal -gt - greater than -ge - greater or equal