一般通过默认安装的ubuntu是不能解压rar文件的，只有在安装了rar解压工具之后，才可以解压。其实在ubuntu下安装rar解压工具是非常简单的，只需要两个步骤就可以迅速搞定。

ubuntu 下rar解压工具安装方法：

压缩功能

安装 sudo apt-get install rar
卸载 sudo apt-get remove rar

解压功能

安装 sudo apt-get install unrar
卸载 sudo apt-get remove unrar

ubuntu解压命令全览

.tar

解包：tar xvf FileName.tar

打包：tar cvf FileName.tar DirName

注：tar是打包，不是压缩！

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.gz

解压1：gunzip FileName.gz

解压2：gzip -d FileName.gz

压缩：gzip FileName

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.tar.gz 和 .tgz

解压：tar zxvf FileName.tar.gz

压缩：tar zcvf FileName.tar.gz DirName

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.bz2

解压1：bzip2 -d FileName.bz2

解压2：bunzip2 FileName.bz2

压缩： bzip2 -z FileName

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.tar.bz2

解压：tar jxvf FileName.tar.bz2

压缩：tar jcvf FileName.tar.bz2 DirName

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.bz

解压1：bzip2 -d FileName.bz

解压2：bunzip2 FileName.bz

压缩：未知

.tar.bz

解压：tar jxvf FileName.tar.bz

压缩：未知

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.Z

解压：uncompress FileName.Z

压缩：compress FileName

.tar.Z

解压：tar Zxvf FileName.tar.Z

压缩：tar Zcvf FileName.tar.Z DirName

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.zip

解压：unzip FileName.zip

压缩：zip FileName.zip DirName

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.rar

解压：rar x FileName.rar

压缩：rar a FileName.rar DirName

rar请到：http://www.rarsoft.com/download.htm 下载！

解压后请将rar_static拷贝到/usr/bin目录（其他由$PATH环境变量指定的目录也可以）：

[root@www2 tmp]# cp rar_static /usr/bin/rar

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.lha

解压：lha -e FileName.lha

压缩：lha -a FileName.lha FileName

lha请到：http://www.infor.kanazawa-it.ac.jp/~ishii/lhaunix/下载！

>解压后请将lha拷贝到/usr/bin目录（其他由$PATH环境变量指定的目录也可以）：

[root@www2 tmp]# cp lha /usr/bin/

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.rpm

解包：rpm2cpio FileName.rpm | cpio -div

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.deb

解包：ar p FileName.deb data.tar.gz | tar zxf -

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tar .tgz .tar.gz .tar.Z .tar.bz .tar.bz2 .zip .cpio .rpm .deb .slp
.arj .rar .ace .lha .lzh .lzx .lzs .arc .sda .sfx .lnx .zoo .cab
.kar .cpt .pit .sit .sea

解压：sEx x FileName.*

压缩：sEx a FileName.* FileName