介紹：?

???? Centos/redhat 操作系統只要按下Ctrl+Alt+Del快捷鍵，系統立馬重啟，而且不會有任何提示和確認，所以我們要嚴防此類事情的發生，針對不同的系統版本，相應的辦法也是不一樣的，具體如下：

Centos 5.x版本的操作系統

[root@bdkyr ~]#?cat?/etc/inittab??

#?Trap?CTRL-ALT-DELETE?

#ca::ctrlaltdel:/sbin/shutdown?-t3?-r?now???//默認為啟用，在前面加上#號進行關閉

Centos 6.x版本的操作系統

[root@rac1 grub]# cat /etc/inittab ?
# inittab is only used by upstart for the default runlevel. ?
# ?
# ADDING OTHER CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM. ?
# ?
# System initialization is started by /etc/init/rcS.conf ?
# ?
# Individual runlevels are started by /etc/init/rc.conf ?
# ?
# Ctrl-Alt-Delete is handled by /etc/init/control-alt-delete.conf??? #關鍵點

由此可以看到在Centos 6.x中該參數已被移動到另外一個配置文件/etc/init/control-alt-delete.conf中了

查看/etc/init/control-alt-delete.conf文件

[root@bdkyr ~]# cat /etc/init/control-alt-delete.conf ?
# control-alt-delete - emergency keypress handling ?
# ?
# This task is run whenever the Control-Alt-Delete key combination is ?
# pressed.? Usually used to shut down the machine. ?

start on control-alt-delete ?

#exec /sbin/shutdown -r now "Control-Alt-Delete pressed"???? //在前面用#號注釋掉 ?

centos7.x操作系統

[root@bdkyr ~]# 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

現在我們知道了Ctrl+Alt+Del在/usr/lib/systemd/system/ctrl-alt-del.target中配置。

那我們直接vim編輯這個文件，按以往設置關閉這個功能的方式去操作：全部注釋點/usr/lib/systemd/system/ctrl-alt-del.target文件中的內容。

[root@bdkyr ~]# vim /usr/lib/systemd/system/ctrl-alt-del.target

#[Unit]
#Description=Reboot
#Documentation=man:systemd.special(7)
#DefaultDependencies=no
#Requires=systemd-reboot.service
#After=systemd-reboot.service
#AllowIsolate=yes

#[Install]

#Alias=ctrl-alt-del.targe

總結

以上是生活随笔為你收集整理的Linux性能优化之“关闭Ctrl+Alt+Del”的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。