下载python安装包
下载地址： wget http://python.org/ftp/python/2.7.2/Python-2.7.2.tgz
[root@puppet ~]#tar –zxf Python-2.7.2.tgz
[root@puppet~]#cd Python-2.7.2
[root@puppet Python-2.7.2]# ./configure --prefix=/usr/local/python27
[root@ puppet Python-2.7.2]# make &make install
[root@puppet Python-2.7.2]# ls /usr/local/python27/ -al
drwxr-xr-x 6 root root 4096 Jul 14 00:21 .
drwxr-xr-x 20 root root 4096 Jul 14 00:17 ..
drwxr-xr-x 2 root root 4096 Jul 14 00:21 bin
drwxr-xr-x 3 root root 4096 Jul 14 00:21 include
drwxr-xr-x 4 root root 4096 Jul 14 00:21 lib
drwxr-xr-x 3 root root 4096 Jul 14 00:21 share
覆盖原来的python链接
[root@puppet Python-2.7.2]# mv /usr/bin/python /usr/bin/python_old
[root@puppet Python-2.7.2]# ln -s /usr/local/python27/bin/python /usr/bin/
[root@puppet Python-2.7.2]#python
此时Python2.7升级成功
[root@puppet Python-2.7.2]# vim /usr/bin/yum
#!/usr/bin/python2.6
此时yum 正常使用