Create new user account and password in shell script
I am trying to create a shell script that will:
check if a specific user already exists
if not, create a specific group and create the user in that group
assign a password to that user, where the password is passed in as a parameter to the script
The problem that I need help with is 3 on Solaris and AIX.
I can do 1 (using the id command) and 2 (using mkgroup or groupadd and useradd commands), but setting the password is where I am having problems. I have got it to work on Linux by redirecting input to the passwd command but I can not find how to get the same functionality to work on AIX and Solaris. This is what I have so far:
I've searched the forums and found some similar postings but nothing seems to answer exactly what I'm looking for.
Some additional information that might preempt some questions:
the script will only be run by the root user
there is not an issue with storing the password unencrypted in a flat file because it will be entered by the user as a parameter at run-time
the script has to be executable on Linux X86, Linux s390x, Solaris 10, and AIX 6
the script can not use any command, utility, or any other software that is not installed on the OS by default, so an answer along the lines of "download and install this..." is no good to me.
I can not use an answer that involves using perl
I can not use an answer that involves using the expect command
If it can't be done, because of something like OS security restrictions and limitations, then please let me know and I'll stop trying to script it!
Thanks in advance for any help or pointers that anyone can provide.
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$cat .a.gz #It's hidden file
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passwd
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Discussion started by: amit1986
2 Replies
LEARN ABOUT DEBIAN
newgrp
NEWGRP(1) User Commands NEWGRP(1)NAME
newgrp - log in to a new group
SYNOPSIS
newgrp [-] [group]
DESCRIPTION
The newgrp command is used to change the current group ID during a login session. If the optional - flag is given, the user's environment
will be reinitialized as though the user had logged in, otherwise the current environment, including current working directory, remains
unchanged.
newgrp changes the current real group ID to the named group, or to the default group listed in /etc/passwd if no group name is given.
newgrp also tries to add the group to the user groupset. If not root, the user will be prompted for a password if she does not have a
password (in /etc/shadow if this user has an entry in the shadowed password file, or in /etc/passwd otherwise) and the group does, or if
the user is not listed as a member and the group has a password. The user will be denied access if the group password is empty and the user
is not listed as a member.
If there is an entry for this group in /etc/gshadow, then the list of members and the password of this group will be taken from this file,
otherwise, the entry in /etc/group is considered.
CONFIGURATION
The following configuration variables in /etc/login.defs change the behavior of this tool:
SYSLOG_SG_ENAB (boolean)
Enable "syslog" logging of sg activity.
FILES
/etc/passwd
User account information.
/etc/shadow
Secure user account information.
/etc/group
Group account information.
/etc/gshadow
Secure group account information.
SEE ALSO id(1), login(1), su(1), sg(1), gpasswd(1), group(5), gshadow(5).
shadow-utils 4.1.5.1 05/25/2012 NEWGRP(1)