Boot CentOS / RHEL 7 & 8 into Emergency Mode / Recovery Mode
As a Linux administrator, you may need to troubleshoot certain instances and fix boot issues. This is usually achieved by booting the system into emergency / recovery mode from the Grub menu. In this guide, you will learn to diagnose problems and recover the system from emergency mode.
Boot CentOS / RHEL 7 & 8 Linux into Emergency / Recovery Mode
Power on your RHEL / CentOS 7/8 LInux machine. When the bootloader menu appears, press Enter Interrupt countdown.
press Ë Key to edit the current entry so that we can modify the default boot loader entry and log into emergency mode.
Now use the cursor keys to navigate tolinux
. You need to attachsystemd.unit=emergency.target
To the end of the line
press Ctrl + X Key to start with the modified configuration.
Login to Emergency situations Enter the mode by entering the root password.
Reinstall using mount command / File system read / write. This will enable you to edit the file system.
# mount -o remount,rw /
You should be able to rescue a failed system from emergency mode. See more Linux guides below.
label:
- Boot CentOS 8 / CentOS 7 to Recovery Mode
- Boot CentOS 8 / CentOS 7 into emergency mode
- Start CentOS 8 / CentOS 7 in single user mode
- Boot RHEL 8 / RHEL 7 into single-user mode
- Boot RHEL 8 / RHEL 7 into Recovery Mode
- Boot RHEL 8 / RHEL 7 into emergency mode