#安装python2.7版本
tar xvf Python-2.7.9.tar.xz
cd Python-2.7.9
./configure --prefix=/usr/bin/python2.7
make
make install
mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/bin/python2.7/bin/python2.7 /usr/bin/python
问题1：yum安装报错
No module named yum
解决：
前面安装了python2.7，默认2.6。python 版本更改后，
/usr/bin/yum 文件需要更新 首行改为 #!/usr/bin/python2.6
问题2：pip command not found
[root@ Python-2.7.9]# pip install jinja2
-bash: pip: command not found
解决[root@ ~]# yum -y install python-setuptools
[root@ ~]# easy_install pip
问题3：安装了python-setuptools之后，easy_install 又报错ImportError: No module named pkg_resources
[root@ ~]# easy_install pip
Traceback (most recent call last):
File "/usr/bin/easy_install", line 5, in <module>
from pkg_resources import load_entry_point
ImportError: No module named pkg_resources
解决：
[root@ ~]# curl https://bootstrap.pypa.io/ez_setup.py | python
问题4：easy_install pip 报错 The 'distribute==0.6.10' distribution was not found
[root@ ~]# easy_install pip
Traceback (most recent call last):
File "/usr/bin/easy_install", line 5, in <module>
from pkg_resources import load_entry_point
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 3019, in <module>
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 3003, in _call_aside
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 3032, in _initialize_master_working_set
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 655, in _build_master
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 963, in require
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 849, in resolve
pkg_resources.DistributionNotFound: The 'distribute==0.6.10' distribution was not found and is required by the application
解决：安装distribute
[root@ ~]# curl -O http://pypi.python.org/packages/source/d/distribute/distribute-0.6.10.tar.gz[root@ ~]# tar zxvf distribute-0.6.10.tar.gz
[root@ ~]# cd distribute-0.6.10
[root@ distribute-0.6.10]# python setup.py install
[root@ ~]# easy_install pip 成功
问题5：上图显示安装pip成功，但执行命令依然显示 command not found
[root@ ~]# pip install jinja2
-bash: pip: command not found
排查：
[root@ ~]# which pip
[root@~]# ls /usr/bin/pip
ls: 无法访问/usr/bin/pip: 没有那个文件或目录
解决：创建软连接：
[root@localhost ~]# ln -s /usr/bin/python2.7/bin/pip /usr/bin/pip
安装成功
[root@~]# pip install jinja2
Collecting jinja2
Downloading Jinja2-2.9.6-py2.py3-none-any.whl (340kB)
100% |████████████████████████████████| 348kB 28kB/s
Collecting MarkupSafe>=0.23 (from jinja2)
Downloading MarkupSafe-1.0.tar.gz
Installing collected packages: MarkupSafe, jinja2
Running setup.py install for MarkupSafe ... done
Successfully installed MarkupSafe-1.0 jinja2-2.9.6