Fedora 16 runlevel 修改
rm /etc/systemd/system/default.target
ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
ln -sf /lib/systemd/system/graphical.target /etc/systemd/system/default.target
How do I know the current run level?
systemctl list-units --type=target