Update the Python version of CentOS

Update the Python version of CentOS

Because a program installed in the CentOS system requires a high version of Python, you must upgrade the Python that comes with the system.

First, query the Python version of the system.

# Python-V

Show is 2.4.3, too old, now upgrade to relatively stable version 3.3.0, you want to upgrade to the latest version can refer to the official website (https://www.python.org/downloads ).

Tip: Do not delete the old version when updating python! New and old versions can coexist. Many basic commands and software packages must depend on the pre-installed old version of python, such as yum.

Upgrade GCC to the latest version to prevent compilation failure.

# Yum-y install gcc

Start upgrading work: # wget http://python.org/ftp/python/3.3.0/Python-3.3.0.tar.bz2

# Tar-jxvf Python-3.3.0.tar.bz2
# Cd Python-3.3.0
#./Configure
# Make all
# Make install
# Make clean
# Make distclean

Compilation and installation are complete. Enter the following command to view the version

#/Usr/local/bin/python3-V

Set up a soft connection to the bin directory of the default python command in the current system.

# Mv/usr/bin/python/usr/bin/python2.4 // The current python version is 2.4, so it is python2.4
# Ln-s/usr/local/bin/python3.3/usr/bin/python

Enter the following command to view the version

#/Usr/local/bin/python3-V

The query version is 3.3.0. However, yum cannot be used normally. You need to modify the yum configuration file.

# Vi/usr/bin/yum

#! /Usr/bin/python #! /Usr/bin/python2.4 // change to the old version number
Save and exit.

The upgrade is complete.

The uninstallation method is attached as follows:

We still remember to use the following command to install the python package: python setup. py install

# Python setup. py install -- record files.txt record the path of the file after installation
# Cat files.txt | xargs rm-rf delete these files

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