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CentOS 7.0 - man page for lppasswd (centos section 1)

lppasswd(1)							    Apple Inc.							       lppasswd(1)

lppasswd - add, change, or delete digest passwords.
lppasswd [ username ] lppasswd -a [ -g groupname ] username lppasswd -x username
lppasswd adds, changes, or deletes passwords in the CUPS digest password file, passwd.md5. When run by a normal user, lppasswd will prompt for the old and new passwords. When run by the super-user, lppasswd can add new accounts (-a username), change existing accounts (user- name), or delete accounts (-x username) in the digest password file. Digest usernames do not have to match local UNIX usernames.
lppasswd supports the following options: -g groupname Specifies a group other than the default system group.
By default, the lppasswd program is not installed to allow ordinary users to change their passwords. To enable this, the lppasswd command must be made setuid to root with the command: chmod u+s lppasswd While every attempt has been made to make lppasswd secure against exploits that could grant super-user privileges to unprivileged users, paranoid system administrators may wish to use Basic authentication with accounts managed by PAM instead.
lp(1), lpr(1), http://localhost:631/help
Copyright 2007-2013 by Apple Inc. 22 February 2008 CUPS lppasswd(1)