which pip查看一下有没有pip
[root@localhost ~]# which pip
/usr/bin/which: no pip in (/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)
yum直接安装（先安装epel源，再安装pip）
yum -y install epel-release
yum install python-pip
报错
[root@localhost ~]# yum -y install epel-release
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
解决方法： 一句话：把/etc/yum.repos.d/epel.repo，文件第3行注释去掉，把第四行注释掉.
打开/etc/yum.repos.d/epel.repo，将
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
修改为
[epel]
name=Extra Packages for Enterprise Linux 6 - basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
再次运行 安装成功
