linux(centos7)中安装7z
一. 先安装wget

yum -y install wget
二. 下载7z的压缩包

wget https://sourceforge.net/projects/p7zip/files/p7zip/16.02/p7zip_16.02_src_all.tar.bz2
三. 安装bzip

yum install -y bzip2
四. 解压压缩包

tar -jxvf p7zip_16.02_src_all.tar.bz2
五. 进入解压的压缩包目录

cd p7zip_16.02
六. 安装gcc和gcc+

yum install gcc

yum install gcc-c++
七. 执行make 和 make install

最后出现下面的即为安装好：

./install.sh /usr/local/bin /usr/local/lib/p7zip /usr/local/man /usr/local/share/doc/p7zip

• installing /usr/local/bin/7za
• installing /usr/local/man/man1/7z.1
• installing /usr/local/man/man1/7za.1
• installing /usr/local/man/man1/7zr.1
• installing /usr/local/share/doc/p7zip/README
• installing /usr/local/share/doc/p7zip/ChangeLog
• installing HTML help in /usr/local/share/doc/p7zip/DOC

解压7z文件的命令就是：7za x blog.7z