[Linux]學習筆記第一篇——安裝
環境：CentOS6.3 minimal
www.2cto.com
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1、下載
鏡像地址：http://mirrors.stuhome.net/centos/6.3/isos/x86_64/
CentOS-6.3-x86_64-netinstall.iso
CentOS-6.3-x86_64-minimal.iso
CentOS-6.3-x86_64-bin-DVD1.iso
CentOS-6.3-x86_64-bin-DVD2.iso
CentOS-6.3-x86_64-LiveCD.iso
CentOS-6.3-x86_64-LiveDVD.iso
2、安裝 www.2cto.com
安裝環境：Oracle VM VirtualBox 4.2.6
3、注銷、關機和重啟
注銷
$ logout
$ Ctrl + D
關機
$ poweroff
重啟
$ reboot
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注：shutdown命令可以關閉所有程序，依照用戶的需要，重新啟動或關機。
1、立即關機：-h 參數讓系統立即關機。范例如下:
$ shutdown –h now ← 要求系統立即關機
2、指定關機時間：time 參數可指定關機的時間，或設置多久時間後運行shutdown命令，范例如下: www.2cto.com
$ shutdown now ← 立刻關機
$ shutdown +5 ← 5分鐘後關機
$ shutdown 10:30 ← 在10:30時關機
3、關機後自動重啟:-r 參數設置關機後重新啟動。范例如下:
$ shutdown -r now ← 立刻關閉系統並重啟
$ shutdown -r 23:59 ← 指定在23:59時重啟動
Usage: shutdown [OPTION]... TIME [MESSAGE]
Bring the system down.
Options:
-r reboot after shutdown
-h halt or power off after shutdown
-H halt after shutdown (implies -h)
-P power off after shutdown (implies -h)
-c cancel a running shutdown
-k only send warnings, don't shutdown
-q, --quiet reduce output to errors only
-v, --verbose increase output to include informational messages
--help display this help and exit
--version output version information and exit
TIME may have different formats, the most common is simply the word 'now' which
will bring the system down immediately. Other valid formats are +m, where m is
the number of minutes to wait until shutting down and hh:mm which specifies the
time on the 24hr clock.
