http://linuxstgo.wordpress.com/fedora-16/run-level-change-in-fedora-16/http://fedoraproject.org/wiki/Systemd
[root@localhost ~]# cat /etc/inittab
# inittab is no longer used when using systemd.
#
# ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
#
# Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target
#
# systemd uses 'targets' instead of runlevels. By default, there are two main targets:
#
# multi-user.target: analogous to runlevel 3
# graphical.target: analogous to runlevel 5
#
# To set a default target, run:
#
# ln -s /lib/systemd/system/<target name>.target /etc/systemd/system/default.target
#
# rm /etc/systemd/system/default.target
3 레벨 변경
# ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
5 레벨 변경
# ln -sf /lib/systemd/system/graphical.target /etc/systemd/system/default.target
[root@localhost ~]# systemctl list-units --type=target
UNIT LOAD ACTIVE SUB JOB DEscRIPTION
basic.target loaded active active Basic System
cryptsetup.target loaded active active Encrypted Volumes
getty.target loaded active active Login Prompts
local-fs-pre.target loaded active active Local File Systems (Pre)
local-fs.target loaded active active Local File Systems
multi-user.target loaded active active Multi-User
network.target loaded active active Network
remote-fs.target loaded active active Remote File Systems
sockets.target loaded active active Sockets
swap.target loaded active active Swap
sysinit.target loaded active active System Initialization
syslog.target loaded active active Syslog
LOAD = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB = The low-level unit activation state, values depend on unit type.
JOB = Pending job for the unit.
12 units listed. Pass --all to see inactive units, too.
