发布于 2015-12-29 06:16:59 | 779 次阅读 | 评论: 1 | 来源: PHPERZ
			Bash Linux SHELL
bash 是一个为GNU项目编写的Unix shell。它的名字是一系列缩写:Bourne-Again SHell — 这是关于Bourne shell(sh)的一个双关语(Bourne again / born again)。Bourne shell是一个早期的重要shell,由Stephen Bourne在1978年前后编写,并同Version 7 Unix一起发布。bash则在1987年由Brian Fox创造。在1990年,Chet Ramey成为了主要的维护者。		
在centos下, 无法使用命令lsof, 出现以下信息:
# lsof -i:3690 -bash: lsof: command not found
我们可以通过yum来安装:
# yum install lsof
示例如下:
# yum install lsof
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: mirrors.163.com
 * epel: ftp.cuhk.edu.hk
 * extras: mirrors.aliyun.com
 * updates: mirrors.163.com
Resolving Dependencies
--> Running transaction check
---> Package lsof.x86_64 0:4.82-4.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
 Package         Arch              Version                Repository       Size
================================================================================
Installing:
 lsof            x86_64            4.82-4.el6             base            319 k
Transaction Summary
================================================================================
Install       1 Package(s)
Total download size: 319 k
Installed size: 890 k
Is this ok [y/N]: y
Downloading Packages:
lsof-4.82-4.el6.x86_64.rpm                               | 319 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : lsof-4.82-4.el6.x86_64                                       1/1 
  Verifying  : lsof-4.82-4.el6.x86_64                                       1/1 
Installed:
  lsof.x86_64 0:4.82-4.el6                                                      
Complete!
3. lsof 的常用几个命令
lsof -i:(端口号)
如,
lsof -i:3306 (3306默认是mysql服务端的端口)
lsof -i:3690 (3690默认是svn服务端的端口)