# MD5
$ openssl passwd -1 [-salt hmm] 123456
$1$hmm$Ej/9o7e5s7ILCtQHu3qBA1
# MD5(Apache)
$ openssl passwd -apr1 [-salt hmm] 123456
$apr1$hmm$q69VJPfmJrazy7lxtucYL/
# UNIX
$ openssl passwd -crypt [-salt hmm] 123456
hmQ.ZJWkch8aY
$ echo -n "123456" | openssl passwd -crypt [-salt hmm] -stdin
hmQ.ZJWkch8aY