Here we are seeing how to reset the root password of a Centos 7 server using single user mode. The method is mainly applicable for dedicated servers since there are options available in the control panel to reset the password for a VPS using any virtualization platform.
- Login to the IPMI and start the Java Console.
- Reboot the server and in the grub menu, you need to select the option to edit by pressing 'e'.
- There you can see some texts and you can find the following words in the 16th line:
ro rd.lvm. lv=centos
- Please remove 'ro' and add the following instead:
rw init=/sysroot/bin/shso it will look like
rw init=/sysroot/bin/sh rd.lvm. lv=centos
- Then press ctrl+x to start the single user mode.
- There you will get a command prompt. Please type the following command there:
- Then reset the root password using passwd command:
- Update SELinux information by using the following command:
- Then exit and reboot the system using the following:
- Once rebooted, you can log in to the server using the newly set password.
Here is the video tutorial for the same: https://bit.ly/2GkmsQf