How can I boot CentOS 8 / RHEL 8 Linux machine into recovery / emergency mode?. As a Linux Administrator, there are instances you may want to troubleshoot and repair boot problems. This is often achieved by booting the system into emergency / recovery mode from the Grub menu. In this guide, you will learn to diagnose issues and recover the system from emergency mode.

Booting CentOS/RHEL 7&8 Linux into Emergency / Recovery mode

Start your RHEL / CentOS 7/8 LInux machine. When the boot-loader menu appears, press any key except Enter to interrupt the countdown.

Screenshot from 2020 02 18 00 24 16

Press e key to edit the current entry so we can modify the default boot-loader entry and log in to emergency mode.

Screenshot from 2020 02 18 00 25 07

Now use the cursor keys to navigate to the line that starts withlinux. You need to appendsystemd.unit=emergency.targetto the end of the line.

Press Ctrl + x key to boot using the modified configuration.

Log in to emergency mode by entering the root password.

Screenshot from 2020 02 18 00 25 29

Use the mount command to remount the / file system read/write. This will enable you to edit the file system.

# mount -o remount,rw /

You should be able to rescue a broken system from the emergency mode. See more Linux guides below.

Tags:

  • Boot CentOS 8 / CentOS 7 in to recovery mode
  • Boot CentOS 8 / CentOS 7 in to emergency mode
  • Boot CentOS 8 / CentOS 7 in to single user mode
  • Boot RHEL 8 / RHEL 7 in to single user mode
  • Boot RHEL 8 / RHEL 7 in to recovery mode
  • Boot RHEL 8 / RHEL 7 in to emergency mode

Your support is our everlasting motivation,
that cup of coffee is what keeps us going!


As we continue to grow, we would wish to reach and impact more people who visit and take advantage of the guides we have on our blog. This is a big task for us and we are so far extremely grateful for the kind people who have shown amazing support for our work over the time we have been online.

Thank You for your support as we work to give you the best of guides and articles. Click below to buy us a coffee.

LEAVE A REPLY

Please enter your comment!
Please enter your name here