【Linux入门基础知识】一些常用的Linux基本命令

　　忘了不少东西，无奈写个Blog Backup:

　　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 Requests that the system be 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 Only send out the 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 +10 10mins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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