linux下如何解压缩rar文件呢？
请看下面的介绍。

一 、系统环境
1.1 系统环境
实验环境一：
CentOS release 5.5 (Final)
2.6.18-194.el5
x86_64 GNU/Linux <--64位系统
实验环境二：
CentOS release 5.4 (Final)
2.6.18-164.el5
i686 GNU/Linux <--32位系统

1.2命令查看方法：
[root@oldboy tools]# cat /etc/redhat-release
CentOS release 5.5 (Final)
[root@oldboy tools]# uname -r
2.6.18-194.el5
[root@oldboy tools]# uname -m
x86_64

二、下载并安装rar软件
2.1 下载
mkdir -p  /home/oldboy/tools
cd /home/oldboy/tools
wget http://files.keray.com/winrar/rarlinux-3.8.0.tar.gz

2.2 安装
tar zxvf rarlinux-3.8.0.tar.gz
cd rar
make
make install

三、rar命令语法
将/etc 目录压缩为etc.rar 命令为：
rar a etc.rar /etc
将etc.rar 解压 命令为：
rar x etc.rar
unrar -e etc.tar

四、例子
实例：将/etc 目录压缩为etc.rar
[root@oldboy tools]# rar a etc.rar /etc
RAR 3.80   Copyright (c) 1993-2008 Alexander Roshal   16 Sep 2008
Shareware version Type RAR -? for help

Evaluation copy. Please register.

Creating archive etc.rar

Adding/etc/gdm/securitytokens.conf OK
Adding/etc/gdm/Init/DefaultOK
Adding/etc/gdm/custom.conf OK
Adding/etc/gdm/XsessionOK
Adding/etc/gdm/PostSession/Default OK
Adding/etc/gdm/PreSession/Default  OK
Adding/etc/gdm/XKeepsCrashing  OK
Adding/etc/gdm/locale.aliasOK
Adding/etc/gdm/PostLogin/Default.sampleOK
省略若干行......

查看
[root@oldboy tools]# ll
总计 26704
-rw-r--r-- 1 root root 26505645 08-20 20:26 etc.rar

将etc.rar 解压：
[root@oldboy tools]# rar x etc.rar

RAR 3.80   Copyright (c) 1993-2008 Alexander Roshal   16 Sep 2008
Shareware version Type RAR -? for help
Extracting from etc.rar

Creatingetc OK
Creatingetc/gdmOK
Extracting  etc/gdm/securitytokens.confOK
Creatingetc/gdm/Init   OK
Extracting  etc/gdm/Init/Default   OK
Extracting  etc/gdm/custom.confOK
Extracting  etc/gdm/Xsession   OK
Creatingetc/gdm/PostSessionOK
Extracting  etc/gdm/PostSession/DefaultOK
省略若干行......