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Top Forums Shell Programming and Scripting Script to change UNIX password Post 20137 by kornshellmaven on Monday 22nd of April 2002 11:23:20 AM
Old 04-22-2002
Question Script to change UNIX password

My shop has just ordained that all UNIX passwords expire after 45 days. We do NOT have a "single logon" facility, so I will need to logon to each of the servers (15+) I interact with and change my password by hand. I thought I could invoke passwd inside a ksh script as a Here document and effectively change my password, stage this script on all the servers under my id, and then invoke via REXEC from one server.

Unfortunately, when I run passwd as a Here doc, it doesn't take my old/new password from stdin.

Here's what I'm doing inside pass.sh:

#!/usr/bin/ksh
passwd <<EOF
oldpassword
newpassword
newpassword
EOF

Does anyone have any thoughts on how I can "synchronize" all my passwords? (I don't have root privs - I'm a developer, not an administrator).
 

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passwd(1openssl)						      OpenSSL							  passwd(1openssl)

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. OpenSSL-0.9.8 Oct 11 2005 passwd(1openssl)
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