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How to reset the root password on RHEL 7 ?
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Here we will see that how we can recover the lost root password on RHEL 7.
1. Reboot the system .
left hand >> with fingers >> one you have hold ctrl button and other one is alt button press together and release it >> and select the mouse on the screen and press e button when you see kernel
2. In the grub menu, press escape key to prevent the system from booting.
Edit the grub menu by pressing “e” .
3. Press the arrow keys to get the “linux16” line and press “end” key.
This will take you to the end of the line.
Here add "rd.break" or "rd.break console=tty1" and
Press control-x to boot the system.
4. You will get the “switch-root” prompt like below.
5. When you boot the system using “rd.break”,
system will be directly mounted on /sysroot in read-only mode.
Let me remount it in read/write mode.
switch_root:/# mount -o remount,rw /sysroot
6. Switch into a chroot jail, where /sysroot is treated as the root of the filesystem tree.
switch_root:/# chroot /sysroot
7. Set the new root password. (please update the CMDB immediately !)
sh-4.2# passwd root
New password:
Retype new password:
passwd:all authentication tokens updated successfully.
8.By default, SE-Linux will be enabled on RHEL7.
So create a blank file with the a name of “.autorelabel” under root.
sh-4.2# touch /.autorelabel
9. Exit from the chroot jail and exit from the initramfs.
10. System will reboot and perform a full SELinux relabel, then reboot again.
11. once the system is rebooted,
you will be able to login with new root password which you have set it .
************************* Keshav Kummari *****************************
How to reset the root password on RHEL 7 ?
*************************************************************************
Here we will see that how we can recover the lost root password on RHEL 7.
1. Reboot the system .
left hand >> with fingers >> one you have hold ctrl button and other one is alt button press together and release it >> and select the mouse on the screen and press e button when you see kernel
2. In the grub menu, press escape key to prevent the system from booting.
Edit the grub menu by pressing “e” .
3. Press the arrow keys to get the “linux16” line and press “end” key.
This will take you to the end of the line.
Here add "rd.break" or "rd.break console=tty1" and
Press control-x to boot the system.
4. You will get the “switch-root” prompt like below.
5. When you boot the system using “rd.break”,
system will be directly mounted on /sysroot in read-only mode.
Let me remount it in read/write mode.
switch_root:/# mount -o remount,rw /sysroot
6. Switch into a chroot jail, where /sysroot is treated as the root of the filesystem tree.
switch_root:/# chroot /sysroot
7. Set the new root password. (please update the CMDB immediately !)
sh-4.2# passwd root
New password:
Retype new password:
passwd:all authentication tokens updated successfully.
8.By default, SE-Linux will be enabled on RHEL7.
So create a blank file with the a name of “.autorelabel” under root.
sh-4.2# touch /.autorelabel
9. Exit from the chroot jail and exit from the initramfs.
10. System will reboot and perform a full SELinux relabel, then reboot again.
11. once the system is rebooted,
you will be able to login with new root password which you have set it .
************************* Keshav Kummari *****************************
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