In /usr/bin/crypt line 20: mcrypt -a enigma -o scrypt -m stream --bare --key $1 --force ^-- SC2086: Double quote to prevent globbing and word splitting. Did you mean: mcrypt -a enigma -o scrypt -m stream --bare --key "$1" --force For more information: https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...