RHEL Recover root Password
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RHEL7
- Reboot OS into emergency mode.
- During the GRUB2 countdown, Edit the first line by pressing "e".
- Locate the line that reads "linux16".
- Immediately following the "quiet" keyword append "rd.break"
- Locate the line that reads "linux16".
- Continue the boot process.
- Press Ctrl-x to boot.
- The system will boot into emergency mode and the switch_root prompt will appear.
- Remount the /sysroot filesystem as rw.
- # mount -o remount,rw /sysroot
- chroot to the /sysroot filesystem.
- # chroot /sysroot
- Create a new password.
- # passwd
- Update the SELinux Security Context.
- touch /.autorelabel
- Exit the /sysroot chroot.
- # exit
- Exit emergency mode.
- # exit