Runlevel

Overview: CentOS 6 & 7 runlevel

CentOS 6	CentOS 7	Function
0	poweroff.target	halt
1	rescue.target	Single user mode
2	multi-user.target	Multiuser, without NFS
3	multi-user.target	Full multiuser mode
4	multi-user.target	unused
5	graphical.target	X11
6	reboot.target	reboot

View current runlevel

CentOS 6 & 7

runlevel

who -r

Switch current runlevel

init <runlevel code>

View system default runlevel

CentOS 6

cat /etc/inittab

CentOS 7

systemctl get-default

Set system default runlevel

CentOS 6

vim /etc/inittab

CentOS 7

systemctl set-default TARGET.target