Generating password hashes with OpenSSL
It is sometimes convenient to generate crypt or MD5 passwords for use in /etc/shadow (or other applications) without running passwd and checking for the encrypted hash in /etc/shadow.
Default Unix password algorithm:
$ openssl passwd -crypt "password"
MD5-based password algorithm:
$ openssl passwd -1 "password"
Depending on your system, default (crypt)
passwords may only be significant to 8 characters. MD5-based passwords
can be up to 256 characters in length. To use MD5-based passwords on
Red Hat systems, make sure USEMD5=yes appears in /etc/sysconfig/authconfig.
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Last modified: 2007/01/23