How to fix RHEL file system
To boot into rescue mode in Red Hat Enterprise Linux (RHEL) 8 and check the file system for corruption, you can follow these steps:
Boot into Rescue Mode
Reboot the System:
Restart your system.Access the Boot Menu:
During the boot process, press a key (usuallyEsc
,F2
,F12
, or a similar key, depending on your system) to access the boot menu.Select Rescue Mode:
If using GRUB bootloader, presse
to edit the boot parameters of the default kernel. Use the arrow keys to navigate to the line that starts withlinux
and appendrd.break
at the end of the line. Then pressCtrl + X
to boot with these parameters.
Check and Fix File System Corruption
- Remount the Root File System: Once you are in the rescue shell, you will need to remount the root file system in read/write mode:
mount -o remount,rw /sysroot
-
Change Root into the Sysroot:
Change the root to the
/sysroot
directory:
chroot /sysroot
-
Check and Repair the File System:
Use the
fsck
command to check and repair the file system. Replace/dev/sdXN
with your actual device identifier (e.g.,/dev/sda1
):
fsck /dev/sdXN
For example, to check the root partition, you might run:
fsck -f /dev/sda1
- Exit and Reboot: After the file system check and repair are complete, exit the chroot environment:
exit
Remount the file system in read-only mode:
mount -o remount,ro /
Reboot the system:
reboot
Alternative Method (Using Rescue Media)
Boot from Rescue Media:
Insert the RHEL 8 installation media and boot from it. Select theTroubleshooting
option from the boot menu, then selectRescue a Red Hat Enterprise Linux system
.Mount the File System:
Follow the prompts to mount the file system. The installer will detect your RHEL installation and mount it under/mnt/sysimage
.Chroot into the Mounted File System:
Change root into the mounted file system:
chroot /mnt/sysimage
Check and Repair the File System:
Follow the same steps as above to runfsck
and repair the file system.Exit and Reboot:
Exit the chroot environment and reboot the system:
exit
reboot
You should be able to boot into rescue mode in RHEL 8 and check and fix any file system corruption.
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