Generate random passwords (r/dailyprogrammer Easy #4)

generate-password.sh

#!/bin/sh
# Generate random passwords. Usage: `./generate-password.sh [quantity [length]]`

case "$#" in
    0)
        QUANTITY=1
        LENGTH=32
        ;;
    1)
        QUANTITY="$1"
        LENGTH=32
        ;;
    2)
        QUANTITY="$1"
        LENGTH="$2"
        ;;
    *)
        echo "Usage: `basename $0` [quantity [length]]"
        exit 1
esac

cat /dev/urandom | tr -dc '[:print:]' | fold -w $LENGTH | head -n $QUANTITY

out.sh-session

$ ./generate-password.sh
~jV=1&t9_@4P%[tl9ZH=9V~/I1r20L!2
$ ./generate-password.sh 5
VI&d&a5{g9O6+Txt&*%wvm0CEn1<M5r+
PCkguo.!_\:S\ JD;!G6i3 GcSLbVg7;
94aLKd}ELKM~c~{i'(ewY`$<_93%H7JO
G6GU.F1Pkl#,wpUUfO6"k'U;@1"}1P:[
cv^by"Z%!wj$,K7C7U*_.'VGvik~/+Qc
$ ./generate-password.sh 3 16
.f)u_EtZ \>|-E;a
d^K-EbAw&^\n2('*
\n28]\cjqQsrBVm!