经过长时间学习Linux基本命令，man与reboot命令还是比较常用的，于是我研究了一下man与reboot应用，在这里拿出来和大家分享一下，希望对大家有用。

Linux基本命令：
who查看当前user
ps aux (我经常多一个‘－’，有一行错误信息)
netstat (具体man or info to CC)
shutdown reboot关机命令
shutdown语法：
／sbin/shutdown[-t秒]［－arkhncfF时间］［警告信息］
eg:
／sbin/shutdown -h 10 'Server will be shutdowned after 10 mins'

man下的参数：
OPTIONS
◆-r Requests that the system be rebooted after it has been brought down.
◆-h Requeststhatthesystembe either halted or powered off after it has been brought down, with the choice as to which left up to the system.
◆-H Requests that the system be halted after it has been brought down.
◆-P Requests that the system be powered off after it has been brought down.
◆-c Cancels a running shutdown.TIME is not specified with this option,the first argument is MESSAGE.
◆-k Onlysendoutthe warning messages and disable logins, do not actually bring the system down.

eg:
shutdown -h now/0
shutdown -h 10:00 /*10点关机
shutdown -h ＋1010mins后关机
shutdown -r now (reboot at once)
shutdown -r +30 'System will reboot in 30mins'
shutdown -k 'System will reboot'(发送警告信息)

reboot命令
shutdown -r now几乎与reboot相同，关机之前输入回填指令：
sync;sync;sync;reboot
fsck - check and repair a Linux file system

fsck /dev/hda7:
To clear the wrong disk block of /dev/hda7 （单人单机模式root）

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