FreeBSD: generate random passwords

Here some way to generate seure passwords:

$ head -c100 /dev/urandom | strings -n1 | tr -d '[:space:]' | head -c15
$ openssl rand -base64 15
$ gpg2 --armor --gen-random 1 15
 
: another way
$ cat /dev/urandom | env LC_CTYPE=C tr -dc a-zA-Z0-9 | head -c 16; echo
$ cat /dev/urandom | env LC_CTYPE=C tr -dc [:graph:] | head -c 16 ; echo

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