RHEL 9.0 Boot in emergency.target

Introduction

# systemctl list-units --type target --all 
  UNIT
  emergency.target
  rescue.target
...

# systemctl get-default 
multi-user.target

Boot in emergency.target

When the boot-loader menu appears, press any key to interrupt the countdown, except Enter.

Use the cursor keys to highlight the default boot-loader entry.

Press e to edit the current entry.

Use the cursor keys to navigate the line that starts with linux text.

Press Ctrl+e to move the cursor to the end of the line.

Append the systemd.unit=emergency.target text to the end of the line.

Press Ctrl+x to boot using the modified configuration.

# mount -o remount,rw /

# mount -a

# vim /etc/fstab

# systemctl daemon-reload

# mount -a

# systemctl reboot