Linux Update Python version and how to modify Python default version

In many cases the server Python version is very low, you need to change the default Python version, but a lot of friends are stumped by this problem, next, through this article to introduce the Linux update Python version and modify the default version of the method, interested friends learn together

Update the Python version under Linux and modify the default version, as a friend can refer to.

In many cases the server Python version is very low, you need to change the default Python version yourself

1, download the Python installation package from the official website (this version can be any version 3.3 2.7 2.6, etc.)

wget http://python.org/ftp/python/2.7/Python-2.7.tar.bz2

2. Unzip and install

TAR-JXVF python-2.7.tar.bz2 cd Python-3.3.0./configure make all make install

Make Distclean python is installed by default in/usr/local/bin/python2.7, you can perform the following command to view the version

/usr/local/bin/python2.7-v The default python for the system is placed at/usr/bin/python2.6 (this 2.6 is the default version of the system)
As a result, a soft connection is required to point to the current system's default Python directory, allowing the system to use the new Python version

mv/usr/bin/python/usr/bin/python2.6//operate on the system default version of Python
Ln-s/usr/local/bin/python2.7/usr/bin/python//Note The first path is a newly installed Python version path, and the second path is the system default path
When the modification is complete, enter python-v or Python to see that the version number has been modified to the newly installed version

Ps:

1, modified the new Python version, then the original installation of the Python plug-in is not in the new version of the Python directory, so need to reinstall

2, some people update the Python version can not use Yum, need to modify its configuration file for Yum

Vi/usr/bin/yum Change the #!/usr/bin/python of the file header to #!/usr/bin/python2.6 (note that this is the previous version of the Python number, since the old version can support Yum)