random string passwords via openssl and tr

my commonly used ones:

# transliterates all punctuation and case, AKA base36

openssl rand -base64 12 | tr '[:punct:]' '[:alnum:]' | tr '[:upper:]' '[:lower:]'

# transliterates "+" and "/" and case; friendly to web and osx, AKA base38

openssl rand -base64 12 | tr '+/' '-_' | tr '[:upper:]' '[:lower:]'

# transliterates all punctuation, AKA base62

openssl rand -base64 12 | tr '[:punct:]' '[:alnum:]'

# all printable ascii, no SPACE, no multi-char groups, dump into a file, AKA base94

export LC_ALL=C && openssl rand 64 | tr -cd "[:print:]" | tr -d "[:space:]" | tr -s "[:print:]" > ~/Desktop/tr_random.txt