[root@dywHome2 ~]# who dywang tty1 2008-09-07 06:00
[root@dywOffice bin]# cd /sbin [root@dywOffice sbin]# ll halt shutdown poweroff reboot -rwxr-xr-x 1 root root 10540 Jul 2 2006 halt* lrwxrwxrwx 1 root root 4 Mar 14 2007 poweroff -> halt* lrwxrwxrwx 1 root root 4 Mar 14 2007 reboot -> halt* -rwxr-xr-x 1 root root 18736 Jul 2 2006 shutdown*
[root@mdk-dyw ~]# shutdown Usage: shutdown [-akrhfnc] [-t secs] time [warning message] -a: use /etc/shutdown.allow -k: don't really shutdown, only warn. -r: reboot after shutdown. -h: halt after shutdown. -f: do a 'fast' reboot (skip fsck). -F: Force fsck on reboot. -n: do not go through "init" but go down real fast. -c: cancel a running shutdown. -t secs: delay between warning and kill signal. ** the "time" argument is mandatory! (try "now") ** [root@mdk-dyw ~]# shutdown -h now [root@mdk-dyw ~]# shutdown -h 00:05 [root@mdk-dyw ~]# shutdown -h +30 [root@mdk-dyw ~]# shutdown -r now [root@mdk-dyw ~]# shutdown -r +30 'The system will reboot' [root@mdk-dyw ~]# shutdown -k now 'This system will reboot'
[root@mdk-dyw ~]# halt
[root@mdk-dyw ~]# reboot
練習題
shutdown -h now
,代表意義為何?
shutdown -h 00:05
,代表意義為何?
shutdown -h +30
,代表意義為何?
shutdown -r now
,代表意義為何?
shutdown -r +30 'This system will reboot'
,代表意義為何?
shutdown -k now 'This system will reboot'
,代表意義為何?