Entering into Single User mode for changing the root password
In single-user mode, your computer boots to runlevel 1. Your local file
systems are mounted, but your network is not activated. You have a
usable system maintenance shell. Unlike rescue mode, single-user mode
automatically tries to mount your file system.
Do not use single-user mode if your file system cannot be mounted successfully. You cannot use single-user mode if the runlevel 1 configuration on your system is corrupted.
When the first boot screen appears press '
b' before countdown goes to 0 seconds.
Then the another screen will appear and select the line stated “Redhat Enterprize Linux Server –(xxxx)”
Select that line and press '
e'.
Then the following screen will appear select the “Kernel /vmlinuz ---XXX” line and press '
e'.
Then write the word '
single' after a space at the end of the line
Then press '
enter' button of your keyboard.
Then press '
b'
Machine will now booted into single user mode.
Now type:
Sh-3.1# passwd
And give your password twice
And type '
reboot'
Password will be changed.
