Suse & OpenSuse Tips » account http://www.susetips.com Tricks, Guides, Tutorials, How Tos and Troubleshooting suse linux Tue, 30 Nov 2010 09:33:05 +0000 en hourly 1 http://wordpress.org/?v=3.3 How to temporary disable users http://www.susetips.com/2009/04/09/how-to-temporary-disable-users/ http://www.susetips.com/2009/04/09/how-to-temporary-disable-users/#comments Thu, 09 Apr 2009 13:05:55 +0000 admin http://www.susetips.com/2009/04/09/how-to-temporary-disable-users/ Post from: Suse & OpenSuse Tips
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How to temporary disable users

]]> From time to time, we will need to disable users.  This may be prior to the permanent deletion of the user account or just as a precautionary step.

As root, you can easily disable a user account by

# usermod –L <username>

Or you can just add an ! in front of the 2nd field (the encrypted password) in the /etc/shadow entry of the user.

To re-enable the user, you can

# usermod –U <username>

This will unlock the user, or simply put, remove the ! in front the password field of /etc/shadow.

If you would like to permanently delete a user, you should use

userdel –r <username>

to also remove their home directories.  Note that in a typical administration, you would usually keep the home directory in case of the need for their data.

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How to temporary disable users

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]]> http://www.susetips.com/2009/04/09/how-to-temporary-disable-users/feed/ 0 How to create user with password assigned http://www.susetips.com/2009/04/09/how-to-create-user-with-password-assigned/ http://www.susetips.com/2009/04/09/how-to-create-user-with-password-assigned/#comments Thu, 09 Apr 2009 12:56:56 +0000 admin http://www.susetips.com/2009/04/09/how-to-create-user-with-password-assigned/ Post from: Suse & OpenSuse Tips
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How to create user with password assigned

]]> If you create new users (as root) using

# useradd –m tux

You will have created a newuser with it being disabled.  This means that the password entry (the 2nd column) in the /etc/shadow will have a ! as the entry, i.e.

tux:!:14343:0:99999:7:::

You can use a script to go through it and change the ! to the encrypted password (which you can create earlier) but you must be aware that existing users that are disabled will have the 2nd field starting with !. 

The -p option on useradd will require the encrypted password as the given parameter.  This will be cumbersome if you are trying to use the script to create a set of new users and you will have to encrypt the individual passwords prior to using the useradd with the -p option.

In order to create a newuser with a password assigned, you can use

# useradd –m tux
# echo welcome | passwd –stdin tux

Or you can copy the following script and use it to create a new user with password and home directory.

#!/bin/sh
if [ $# –ne 2 ]; then
    echo “Usage: $0 <username> <password>”
    exit 1
fi
useradd –m $1
echo $2 | passwd –stdin $1

There are other ways to do it as well, but this is an easy way to understand it.  Have fun!

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How to create user with password assigned

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