How to set an environment variable (secret, password, etc.) in a way so its value is not saved to the Bash history.
# The password will be stored in the ROOTPASS variable # The -s option tells read not to echo the typed characters, so nobody can look it up while you type it. -p indicates prompt. read -s -p "Enter password:" ROOTPASS # If you need the variable to be available in subshells, then you must export it: export ROOTPASS