Linux Python

python2.7.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

[root@zylpython]#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

[root@zylpython]# cd /Python-2.7.8

5.安装

[root@zylPython-2.7.8]# ./configure --prefix=/usr/local/python27

[root@zylPython-2.7.8]#make

[root@zylPython-2.7.8]# 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

[root@zyl ~]#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

[root@zylPython-2.7.8]# mv /usr/bin/python /usr/bin/python_old

2.建立新的python的软连接

[root@zylPython-2.7.8]# ln -s /usr/local/python27/bin/python /usr/bin/

3. 再查看一下版本，发现ok

[root@zyl ~]#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）

[root@zyl ~]# 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, Dec  3 2014, 10:51:34)

[GCC 4.1.220080704 (Red Hat 4.1.2-55)] on linux2

If you cannotsolve this problem yourself, please Go to

the yum faq at:

http://wiki.linux.duke.edu/YumFaq

[root@zylPython-2.7.8]# vim /usr/bin/yum

#!/usr/bin/python   #修改此处为2.6的位置

[root@zyl ~]# vim/usr/bin/yum

#!/usr/bin/python2.6

[root@zyl~]# yum

Loaded plugins:fastestmirror

You need to givesome command

usage: yum [options]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。