Centos7/rhel7 reset the root password

Centos7/rhel7 reset the root password

(Unlike the previous, when the root password is forgotten and GRUB2 is used as the starter, the root password cannot be reset in single-user mode. The following describes how to reset the root password of CentOS7)

1. Start the system and press e to enter the editing mode when GRUB2 starts the screen display.

2. Add the following content at the end of the Parameter Line of linux16/linux/linuxefi:

Init =/bin/sh

3. Press Ctrl + x to start to shell.

4. Mount the file system in writable mode:

Mount-oremount, rw/

5. Run passwd and change the root password as prompted.
6. If selinux is enabled in the system, you must run the following command. Otherwise, the system cannot be started properly:

Touch/. autorelabel

7. Run the exec/sbin/init command to start the instance normally, or run the exec/sbin/reboot command to restart the instance.

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