Linux Python
Centos 6.4 python 2.6升级到 2.7python2.7.X下载安装
1.查看python的版本
[root@zyl ~]# python -V
Python 2.6.6
2.下载Python-2.7.8
#wgethttp://python.org/ftp/python/2.7.8/Python-2.7.8.tgz
3.解压
root@zyl python]#tar xf Python-2.7.8.tgz
4.切换目录
# cd /Python-2.7.8
5.安装
# ./configure --prefix=/usr/local/python27
#make
# make install
最新2.7.8版本的python已经安装到了系统中，但是还没有完成
再次查看python版本，发现依然是2.6.6版本
#python -V
Python 2.6.6
python多版本共存解决
1.把原来的python重命名成python_old，注意不要删除它
# mv /usr/bin/python /usr/bin/python_old
2.建立新的python的软连接
# ln -s /usr/local/python27/bin/python /usr/bin/
3. 再查看一下版本，发现ok
#python -V
Python 2.7.8
至此我们已经可以正常使用python2.7.X
解决yum的python版本问题
但是我们还有最后一个问题要解决:但是因为yum是使用的python2.4的版本，所以,还需要修改一下（前面我们重命名的python_old现在派上用场）
# yum
There was aproblem importing one of the Python modules
required to runyum. The error leading to this problem was:
No module namedyum
Please install apackage which provides this module, or
verify that themodule is installed correctly.
It's possiblethat the above module doesn't match the
current versionof Python, which is:
Python 2.7.8(default, Dec3 2014, 10:51:34)
on linux2
If you cannotsolve this problem yourself, please go to
the yum faq at:
http://wiki.linux.duke.edu/YumFaq
# vim /usr/bin/yum
#!/usr/bin/python #修改此处为2.6的位置
# vim/usr/bin/yum
#!/usr/bin/python2.6
# yum
Loaded plugins:fastestmirror
You need to givesome command
usage: yum COMMAND
List of Commands:
check-update Check for available package updates
clean Remove cached data
deplist List a package's dependencies
downgrade downgrade a package
erase Remove a package or packages fromyour system
groupinfo Display details about a package group
groupinstall Install the packages in a group on yoursystem
grouplist List available package groups
groupremove Remove the packages in a group from yoursystem
help Display a helpful usage message
info Display details about a package orgroup of packages
install Install a package or packages on yoursystem
list List a package or groups of packages
localinstall Install a local RPM
yum 可以使用；python升级成功。
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