pigz在centos6.8下的编译安装

pigz是压缩命令gzip的并行版，默认线程数是cpu个数。在centos7中可以用yum安装，在centos6，yum源中没有找到，使用下面的命令安装：
1、安装基础包：
yum install zlib-devel gcc gcc-c++ -y
2、下载pigz包：
wget http://www.zlib.net/pigz/pigz-2.4.tar.gz
3、解压，编译：
tar xvf pigz-2.4.tar.gz
cd pigz-2.4
make
echo $?
ln -s /etc/yum.repos.d/pigz-2.4/pigz /bin/pigz
4、验证：

[root@centos6 pigz-2.4]# pigz
Usage: pigz [options] [files ...]
  will compress files in place, adding the suffix '.gz'. If no files are
  specified, stdin will be compressed to stdout. pigz does what gzip does,
  but spreads the work over multiple processors and cores when compressing.

Options:
  -0 to -9, -11        Compression level (level 11, zopfli, is much slower)
  --fast, --best       Compression levels 1 and 9 respectively
  -b, --blocksize mmm  Set compression block size to mmmK (default 128K)
  -c, --stdout         Write all processed output to stdout (won't delete)
  -d, --decompress     Decompress the compressed input
  -f, --force          Force overwrite, compress .gz, links, and to terminal
  -F  --first          Do iterations first, before block split for -11
  -h, --help           Display a help screen