操作系统：CentOS 7.x
1、下载解压工具包unar
下载地址：
https://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/libobjc-4.8.5-44.el7.x86_64.rpm
https://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/avahi-libs-0.6.31-20.el7.x86_64.rpm
https://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/wavpack-4.60.1-9.el7.x86_64.rpm
https://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/nettle-2.7.1-8.el7.x86_64.rpm
https://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/trousers-0.3.14-2.el7.x86_64.rpm
https://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/gnutls-3.3.29-9.el7_6.x86_64.rpm
https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/g/gnustep-base-libs-1.24.9-1.el7.x86_64.rpm
https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/u/unar-1.10.7-1.el7.x86_64.rpm
上传安装包到/usr/local/src目录
2、安装unar工具包
cd /usr/local/src
rpm -ivh libobjc-4.8.5-44.el7.x86_64.rpm
rpm -ivh avahi-libs-0.6.31-20.el7.x86_64.rpm
rpm -ivh wavpack-4.60.1-9.el7.x86_64.rpm
rpm -ivh nettle-2.7.1-8.el7.x86_64.rpm
rpm -ivh trousers-0.3.14-2.el7.x86_64.rpm
rpm -ivh gnutls-3.3.29-9.el7_6.x86_64.rpm
rpm -ivh gnustep-base-libs-1.24.9-1.el7.x86_64.rpm
rpm -ivh unar-1.10.7-1.el7.x86_64.rpm
#yum源安装
yum install epel-release #需要安装epel源
yum install unar
3、解压rar文件
unar file.rar
#Linux解压缩命令
*.tar.gz后缀 解压命令：tar -zxv -f file.tar.gz
*.gz后缀 解压命令：gzip -d file.gz
*.tar.bz2后缀 解压命令：tar -jxv -f file.tar.bz2
.*bz2后缀 解压命令：bzip2 -d file.bz2
*.zip后缀 解压命令：unar file.zip/unzip file.zip
*.rar后缀 解压命令：unar file.rar
至此，Linux下解压rar压缩文件完成。
