Linux Learning Note: RunLevel Seven levels of meaning and changing the operating level

0: Shut down immediately.

1: Enter single maintenance mode

2: Enter multi-user mode, but the NFS function is Missing (NFS is also started in the test)

3: Access to multi-user full mode, is also the most common common mode.

4: Reserved

5: Graphical interface

6: Restart

#要改变运行等级, you can use the init command, and you need root permissions

[[email protected] ~]$ init 0

Init:need to be root

#查看runlevel则没有权限限制

[email protected] ~]$ runlevel

N 3

The latter represents the current RunLevel, the former represents the previous runlevel, if the runlevel since the boot has not changed, the former is the letter N.

Linux Learning Note: RunLevel Seven levels of meaning and changing the operating level