如何在Centos/RHEL上安装KornShell(KSH)

Korn shell 是一个unix上的shell 程序,主要用在各种unix系统上,比如:sun/oracle unix,AIX等。ksh是有贝尔实验室的David korn开发出来的,ksh结合了C shell的交互式特性,并且也融入了bourne shell的语法。
那么如何在linux系统上运行korn shell(ksh)呢?
安装korn shell(ksh)
在linux终端下,通过yum来安装ksh程序
[cc lang=”php”]
$sudo yum install ksh
[/code]

[cc lang=”php”]
#yum install ksh
[/code]
命令输出:
[cc lang=”php”]
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: ftp.nsysu.edu.tw
* extras: ftp.cs.pu.edu.tw
* updates: mirrors.stuhome.net
base                                                                 | 3.7 kB     00:00
extras                                                              | 3.4 kB     00:00
updates                                                           | 3.4 kB     00:00
updates/primary_db                                | 3.9 MB     00:05
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package ksh.x86_64 0:20100621-19.el6_4.4 will be installed
–> Finished Dependency Resolution
Dependencies Resolved
============================================================================================
Package        Arch              Version                          Repository
Size
============================================================================================
Installing:
ksh            x86_64            20100621-19.el6_4.4              updates            687 k
Transaction Summary
============================================================================================
Install       1 Package(s)
Total download size: 687 k
Installed size: 1.5 M
Is this ok [y/N]:
Downloading Packages:
ksh-20100621-19.el6_4.4.x86_64.rpm                       | 687 kB     00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : ksh-20100621-19.el6_4.4.x86_64                     1/1
Verifying  : ksh-20100621-19.el6_4.4.x86_64                    1/1
Installed:
ksh.x86_64 0:20100621-19.el6_4.4
Complete!
[/code]
查看ksh的安装路径,输入下面的命令:
[cc lang=”php”]
$whereis ksh
[/code]
或者使用grep命令:
[cc lang=”php”]
$grep –color ksh /etc/shells
[/code]
命令输出:
ksh install1
将ksh设置为系统默认shell
超级用户(root)可以使用下面的命令为任何用户更改登陆后的shell程序。
命令如下:
[cc lang=”php”]
$sudo chsh -s /bin/ksh 用户名
[/code]
或者
[cc lang=”php”]
#chsh -s /bin/ksh 用户名
[/code]
示例:将test用户的默认登陆shell设置为ksh
[cc lang=”php”]
#chsh -s /bin/ksh test
[/code]
验证当前用户正在使用的shell程序,输入下面的命令:
[cc lang=”php”]
$echo $SHELL
[/code]
命令输出:
[cc lang=”php”]
/bin/ksh
[/code]
查看ksh的版本号,输入命令:
[cc lang=”php”]
$ksh –version
[/code]
命令输出:
[cc lang=”php”]
version         sh (AT&T Research) 93t+ 2010-06-21
[/code]

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