Disable Ctrl-Alt-Del

注释掉 ca::ctrlaltdel# cat /etc/inittab
# Trap CTRL-ALT-DELETE
#ca::ctrlaltdel:/sbin/shutdown -t3 -r now修改为：

# cat /etc/inittab
# Trap CTRL-ALT-DELETE
 ca::ctrlaltdel:/bin/logger -p authpriv.warning -t init "Console-invoked Ctrl-Alt-Del was ignored"

# cp -v /etc/init/control-alt-delete.conf{,.bak}

替换行exec /sbin/shutdown
# cat /etc/init/control-alt-delete.conf
 exec /usr/bin/logger -p authpriv.notice -t init "Ctrl-Alt-Del was pressed and ignored"

# ln -sf /dev/null /etc/systemd/system/ctrl-alt-del.target

或
# systemctl mask ctrl-alt-del.target