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 /usr/lib/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 view current default target, run:
# systemctl get-default
#
# To set a default target, run:
# systemctl set-default TARGET.target
ll /usr/lib/systemd/system/ctrl-alt-del.target
lrwxrwxrwx. 1 root root 13 Apr 12 23:42 /usr/lib/systemd/system/ctrl-alt-del.target -> reboot.target
rm /usr/lib/systemd/system/ctrl-alt-del.target
init q
如需开启则重新创建链接，再次执行init q重新reload配置文件即可。