CentOS自带unzip，不过在解压大压缩卷时提示：error:;Zip file too big (greater than 4294959102 bytes)，可安装p7zip解压。
cd /usr/local/src/
wget http://sourceforge.net/projects/p7zip/files/p7zip/9.20.1/p7zip_9.20.1_src_all.tar.bz2
tar jxvf p7zip_9.20.1_src_all.tar.bz2
cd p7zip_9.20.1
make
make install相关命令：
a: Add files to archive
b: Benchmark
d: Delete files from archive
e: Extract files from archive (without using directory names)
l: List contents of archive
t: Test integrity of archive
u: Update files to archive
x: eXtract files with full paths