2024年3月31日发(作者：)
linux的reboot命令
Linux下的reboot命令是用来重启linux系统的。下面由店铺为
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linux的reboot命令详解
命令简介：
该命令用来重启Linux系统。相当于Windows系统中的restart
命令。
命令语法：
/sbin/reboot [-n] [-w] [-d] [-f] [-i]
或
reboot [-n] [-w] [-d] [-f] [-i]
命令参数：
参数
-d
-f
-h
-i
-n
-p
长参数
描叙
重新启动时不把数据写入记录文件/var/tmp/wtmp
强制重新开机，不调用shutdown指令的功能。
在系统关机或poweroff之前，将所有的硬盘处于待机模式
关闭网络设置之后再重新启动系统
保存数据后再重新启动系统
When halting the system, do a poweroff. This is the
default when halt is called as poweroff
仅做测试，并不真的将系统重新开机，只会把重开机的数
据写入/var/log目录下的wtmp记录文件
显示命令在线帮助
-w
--help
linux的reboot命令使用示例
1: 查看reboot命令的帮助信息
[root@DB-Server ~]# reboot --help
usage: reboot [-n] [-w] [-d] [-f] [-h] [-i]
-n: don't sync before halting the system
-w: only write a wtmp reboot record and exit.
-d: don't write a wtmp record.
-f: force halt/reboot, don't call shutdown.
-h: put harddisks in standby mode.
-i: shut down all network interfaces.
[root@DB-Server ~]# man reboot
[root@DB-Server ~]# man reboot
HALT(8) Linux System Administrator鈥檚 Manual HALT(8)
NAME
halt, reboot, poweroff - stop the system.
SYNOPSIS
/sbin/halt [-n] [-w] [-d] [-f] [-i] [-p] [-h]
/sbin/reboot [-n] [-w] [-d] [-f] [-i]
/sbin/poweroff [-n] [-w] [-d] [-f] [-i] [-h]
DESCRIPTION
Halt notes that the system is being brought down in the file
/var/log/wtmp, and then either tells the kernel to halt, reboot or
poweroff the system.
If halt or reboot is called when the system is not in runlevel
0 or 6, in other words when it鈥檚 running normally, shutdown
will be invoked instead (with
the -h or -r flag). For more info see the shutdown(8)
manpage.
The rest of this manpage describes the behaviour in runlevels
0 and 6, that is when the systems shutdown scripts are being run.
OPTIONS
-n Don鈥檛 sync before reboot or halt. Note that the kernel
and storage drivers may still sync.
-w Don鈥檛 actually reboot or halt but only write the wtmp
record (in the /var/log/wtmp file).
-d Don鈥檛 write the wtmp record. The -n flag implies -d.
-f Force halt or reboot, don鈥檛 call shutdown(8).
-i Shut down all network interfaces just before halt or reboot.
-h Put all harddrives on the system in standby mode just
before halt or poweroff.
-p When halting the system, do a poweroff. This is the default
when halt is called as poweroff.
DIAGNOSTICS
If you鈥檙e not the superuser, you will get the message 鈥
榤ust be superuser鈥? Users logged in locally on the console can
call halt, reboot, and poweroff
without supplying the root password, due to pam_console
(8).
NOTES
Under older sysvinit releases , reboot and halt should never
be called directly. From release 2.74 on halt and reboot invoke
shutdown(8) if the system is
not in runlevel 0 or 6. This means that if halt or reboot cannot
find out the current runlevel (for example, when /var/run/utmp
hasn鈥檛 been initialized
correctly) shutdown will be called, which might not be what
you want. Use the -f flag if you want to do a hard halt or reboot.
The -h flag puts all harddisks in standby mode just before
halt or poweroff. Right now this is only implemented for IDE
drives. A side effect of putting
the drive in standby mode is that the write cache on the disk
is flushed. This is important for IDE drives, since the kernel doesn
鈥檛 flush the write-cache
itself before poweroff.
The halt program uses /proc/ide/hd* to find all IDE disk
devices, which means that /proc needs to be mounted when halt
or poweroff is called or the -h
switch will do nothing.
AUTHOR
MiquelvanSmoorenburg,******************
SEE ALSO
shutdown(8), init(8), pam_console(8)
Nov 6, 2001 HALT(8)
(END)
2：强制重新开机，不调用shutdown指令的功能
[root@DB-Server ~]# reboot -f
3：关闭网络设置之后再重新启动系统
[root@DB-Server ~]# reboot -i
Broadcast message from root (pts/1) (Mon Jul 28 11:31:28
2014):
The system is going down for reboot NOW!
4：保存数据后再重新启动系统
[root@DB-Server ~]# reboot -n
Broadcast message from root (pts/1) (Mon Jul 28 11:33:57
2014):
The system is going down for reboot NOW!
5：重新启动时不把数据写入记录文件/var/tmp/wtmp
[root@DB-Server ~]# reboot -d
Broadcast message from root (pts/2) (Mon Jul 28 11:23:26
2014):
The system is going down for reboot NOW!
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