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Top Forums Shell Programming and Scripting How to change passwords for User accounts on multiple UNIX/Linux machines remotely? Post 302748183 by cjcox on Monday 24th of December 2012 01:10:55 PM
Old 12-24-2012
Each platform could have different hash types... so direct manipulation of passwords could be difficult (that is, replacing the hash itself... not that repeating hashes is necessarily a good practice anyhow).... so you can either expore "expect" like wrappers around the password command and make remote ssh invocations (you want something that will doesn't expose the passwords via clear text on the wire).... or maybe it's time to consider some form of centralized auth (?) On some linux distros there are tools for setting a password in a "batch" style as well, but nothing universal. Even an expect script on each host might have to be tuned depending on the platforms and the response strings returned. There are some examples that come with expect. You might want to take a look at it. I think it's primary dependency is tcl.
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PASSWD(1)							      OpenSSL								 PASSWD(1)

NAME
passwd - compute password hashes SYNOPSIS
openssl passwd [-crypt] [-1] [-apr1] [-salt string] [-in file] [-stdin] [-noverify] [-quiet] [-table] {password} DESCRIPTION
The passwd command computes the hash of a password typed at run-time or the hash of each password in a list. The password list is taken from the named file for option -in file, from stdin for option -stdin, or from the command line, or from the terminal otherwise. The Unix standard algorithm crypt and the MD5-based BSD password algorithm 1 and its Apache variant apr1 are available. OPTIONS
-crypt Use the crypt algorithm (default). -1 Use the MD5 based BSD password algorithm 1. -apr1 Use the apr1 algorithm (Apache variant of the BSD algorithm). -salt string Use the specified salt. When reading a password from the terminal, this implies -noverify. -in file Read passwords from file. -stdin Read passwords from stdin. -noverify Don't verify when reading a password from the terminal. -quiet Don't output warnings when passwords given at the command line are truncated. -table In the output list, prepend the cleartext password and a TAB character to each password hash. EXAMPLES
openssl passwd -crypt -salt xx password prints xxj31ZMTZzkVA. openssl passwd -1 -salt xxxxxxxx password prints $1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a.. openssl passwd -apr1 -salt xxxxxxxx password prints $apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0. 1.0.1e 2013-02-11 PASSWD(1)
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