4. Change the current target unit to rescue.target (also called single-user mode,

runlevel 1, and rescue mode).

a. Working with root privileges, give the following command to change to

rescue.target. In a multiuser or graphical environment you would want

to make sure no one else was logged in before giving this command. See

Changing the Current Runlevel on page 445 of Sobell for more

information.

$ su -c 'systemctl isolate rescue.target'

After you give this command, the system shuts down the GUI, displays a

textual CLI, and displays the following prompt:

Give root password for maintenance

(or type Control-D to continue)

b. If you press CONTROL-D at this point, the system reboots to graphical.target.

Instead, type the root password and press RETURN; the system enters

rescue.target (single-user mode) and displays a root prompt:

[root@linux ~]#

You are working with root privileges in rescue.target.

c. Give the following command to confirm the system is running in

rescue.target (rescue mode):

[root@linux ~]# systemctl list-units --type=target | egrep 'rescue|multi-user|graphical

rescue.target loaded active active Rescue Mode