Linux Replacement Python version

After installing CentOS6.5 (Final), execute #python and #python-v, see version number is 2.6, and previously written is run on python3.x above, 3.X and 2.X have a lot of different, interested friends can refer to this article:
Update Python never remove the old version! The old and new versions can coexist, and many of the basic commands and packages are dependent on the preinstalled versions of Python, such as Yum.
Update Python:
1th step: Update gcc because the GCC version is too old to cause the new version of Python package compilation to be unsuccessful

Copy the code code as follows:
#yum-y Install gcc

The system is automatically downloaded and installed or updated, and so it ends itself
2nd step: Download the Python-3.3.0 package

Copy the code code as follows:
#wget http://python.org/ftp/python/3.3.0/Python-3.3.0.tar.bz2

Note: The package downloaded according to the above command will be stored in your current working directory, the wget command is a free tool to download files automatically from the network, for specific use, please refer to this article: http://www.jb51.net/os/RedHat/73089.html
Note: The number in the command is the version number, you can also change the 3.3.0 to the version you need, as of the time I wrote (January 29, 2013), the latest available version is 3.3.0
3rd Step: Unzip the downloaded binary package and compile the installation

Copy the code code as follows:
#tar-JXVF python-3.3.0.tar.bz2
#cd Python-3.3.0
#./configure
#make All
#make Install
#make Clean
#make Distclean
#/usr/local/bin/python3–v

After compiling the installation, you can enter the above line command to view the version
4th step: Establish a soft connection to the bin directory of the current system default Python command and let the system use the new version of Python
#mv/usr/bin/python/usr/bin/python2.4//Current Python version is 2.4 so it's python2.4.
#ln-S/usr/local/bin/python3.3/usr/bin/python
Enter #python-v to view the current default Python version
After the default Python successfully points to 3.3.0, Yum does not work, and the Yum configuration file needs to be modified
5th step: Modify the Yum configuration file
#vi/usr/bin/yum
Change the #!/usr/bin/python of the head of the file to #!/usr/bin/python2.4//change to the previous old version number
Save and exit, Yum will work. If there are other commands, the software does not work properly, follow the Yum configuration file modification method, modify its configuration file.
This completes the update.

Linux Replacement Python version