How to reset root passwords on rhel 7 and cent os 7 linux systems
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To reset the root password on a Red Hat Enterprise Linux 7 or CentOS 7 system when it is forgotten, one can edit the GRUB bootloader to boot into single-user mode. This allows remounting the root filesystem as read-write, using the passwd command to change the root password, and then remounting read-only before rebooting the server.
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How to reset root passwords on rhel 7 and cent os 7 linux systems
- 1. Howto Reset Root Passwords on RHEL 7 and CentOS 7 Linux Systems If you have forgotten your root password on a Red Hat Enterprise Linux 7 server you can reset your root password as long as you have access to the GRUB 2 bootloader. (The following example was performed on a OL7 server) press "e" to edit. Find line beginning linux Find the line beginning with linux. In this example the line begins linux16.
- 2. Using the arrow keys and the delete key, manually delete the following entries rhgb and quiet from the line. Next, in the end of the line add this init=/bin/sh press the keys Ctrl +X to reboot - Load the installed SELinux policy: /usr/sbin/load_policy -i - Remount the "/" root filesystem in Read/Write mode: mount -o remount,rw / - Using command passwd to change your new root password - Remount the "/" root filesystem in Read Only mode: mount -o remount,ro / - Using this command to reboot server #exec /sbin/init 6