RHEL Recover root Password: Difference between revisions
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## <tt>'''touch /.autorelabel'''</tt> | ## <tt>'''touch /.autorelabel'''</tt> | ||
# Exit the <tt>'''/sysroot'''</tt> chroot. | # Exit the <tt>'''/sysroot'''</tt> chroot. | ||
## <tt>'''# exit'''<tt> | ## <tt>'''# exit'''</tt> | ||
# Exit emergency mode. | |||
## <tt>'''# exit'''</tt> | |||
== RHEL8/RHEL9 == | |||
# Reboot OS into emergency mode. | |||
# During the GRUB2 countdown, Edit the first line by pressing <tt>'''"e"'''</tt>. | |||
## Locate the line that reads <tt>'''"linux"'''</tt>. | |||
### Immediately following the <tt>'''"quiet"'''</tt> keyword append <tt>'''"rd.break"'''</tt> | |||
# Continue the boot process. | |||
## Press <tt>'''Ctrl-x'''</tt> to boot. | |||
# The system will boot into emergency mode and the <tt>'''switch_root'''</tt> prompt will appear. | |||
# Remount the <tt>'''/sysroot'''</tt> filesystem as <tt>'''rw'''</tt>. | |||
## <tt>'''# mount -o remount,rw /sysroot'''</tt> | |||
# chroot to the <tt>'''/sysroot'''</tt> filesystem. | |||
## <tt>'''# chroot /sysroot'''</tt> | |||
# Create a new password. | |||
## <tt>'''# passwd'''</tt> | |||
# Update the SELinux Security Context. | |||
## <tt>'''touch /.autorelabel'''</tt> | |||
# Exit the <tt>'''/sysroot'''</tt> chroot. | |||
## <tt>'''# exit'''</tt> | |||
# Exit emergency mode. | # Exit emergency mode. | ||
## <tt>'''# exit'''</tt> | ## <tt>'''# exit'''</tt> | ||
== Further Reading == | |||
# [https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/ch-working_with_the_grub_2_boot_loader#sec-Changing_and_Resetting_the_Root_Password RHEL7 Changing and resetting the root password] | |||
# [https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/changing-and-resetting-the-root-password-from-the-command-line_configuring-basic-system-settings#resetting-the-forgotten-root-password-on-boot_changing-and-resetting-the-root-password-from-the-command-line RHEL8 Changing and resetting the root password] | |||
# [https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_basic_system_settings/changing-and-resetting-the-root-password-from-the-command-line_configuring-basic-system-settings RHEL9 Changing and resetting the root password] | |||
[[Category:Linux]] |
Latest revision as of 13:56, 19 September 2023
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
RHEL8/RHEL9
- Reboot OS into emergency mode.
- During the GRUB2 countdown, Edit the first line by pressing "e".
- Locate the line that reads "linux".
- Immediately following the "quiet" keyword append "rd.break"
- Locate the line that reads "linux".
- 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