centos安装python2.7
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1、查看版本
#python -VPython 2.6.6
2、安装前准备,安装相关库
#yum install gcc gcc-c++ autoconf automake
#yum install openssl openssl-devel
3、下载安装
#wget https://www.python.org/ftp/python/2.7.11/Python-2.7.11.tgz
#tar -xvzf Python-2.7.11.tgz
#cd Python-2.7.11
#./configure --prefix=/usr/local/python2.7
#make
#make install
4、修改python链接指向
#mv /usr/bin/python /usr/bin/python2.6.6.old
#ln -s /usr/local/python2.7/bin/python /usr/bin/python
查看版本
# python -V
Python 2.7.11
5、修改yum使用的python版本
虽然现在python已经安装完成,但是使用yum命令会有问题——yum不能正常工作:
# yum list
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
No module named yum
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
2.7.11 (default, Aug 17 2016, 23:54:43)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)]
If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq
这是因为yum默认使用的python版本是2.6.6,到哪是现在的python版本是2.7.11,故会出现上述问题,只需要该一下yum的默认python配置版本就行了:
#vi /usr/bin/yum
将文件头部的#!/usr/bin/python改为
#!/usr/bin/python2.6
6、修改环境变量
$vim ~/.bash_profile
修改为:
PYTHON_HOME=/usr/local/python2.7
PATH=$PATH:$HOME/bin:$PYTHON_HOME/bin
$source .bash_profile
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