Enable user authentication for single user mode

Posted: August 7, 2013 in Uncategorized
By default you will be automatically logged in to single user mode as root, this can be security risk so better to enable a user login add the single user mode.
RHEL/CentOS & most of the unix OS allows access from the console into single user mode without a password. This is handy when things get messed up preventing access to the auth subsystems. To accomplish the same behavior under Ubuntu, edit the /etc/inittab file and change the line.
Step 1 : Edit /etc/inittab file
[root@afzalkhan ~]# vi /etc/inittab
 
Step 2 : Add following entry at end of the file
sum:S:wait:/sbin/sulogin
Step 3 : Save & Exit this file.
Try booting your machine in level 1 to check this security feature.
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