linux升级python版本

首先去python.org/downloads选择源码链接，并右击复制下载链接，我使用了最新的py2.7.9，方法与下面相似。

文章转载于：点击打开链接，感谢原作者

从今天开始学习Python!看了一下虚拟机RedHat中的python，发现还是原生的2.4.3，所以决定升级一下

[root@linuxidc ~]# python

 Python 2.4.3 (#1, May  5 2011, 16:39:10)

[GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>>

[root@linuxidc ~]#

1.下载z最新版本的python

[root@linuxidc ~]# wget http://python.org/ftp/python/2.7.6/Python-2.7.6.tgz
2.解压及编译

[root@linuxidc ~]# tar xvf Python-2.7.2.tar.bz2

[root@linuxidc Python-2.7.6]# ./configure --prefix=/usr/local/python27

[root@linuxidc Python-2.7.6]# make

[root@linuxidc Python-2.7.6]# make install

[root@linuxidc Python-2.7.6]# ls /usr/local/python27/ -al

total 28

drwxr-xr-x  6 root root 4096 Mar 21 01:01 .

drwxr-xr-x 13 root root 4096 Mar 21 01:01 ..

drwxr-xr-x  2 root root 4096 Mar 21 01:01 bin

drwxr-xr-x  3 root root 4096 Mar 21 01:01 include

drwxr-xr-x  4 root root 4096 Mar 21 01:01 lib

drwxr-xr-x  3 root root 4096 Mar 21 01:01 share

3.覆盖原有的python链接

[root@linuxidc Python-2.7.6]# mv /usr/bin/python /usr/bin/python_old

[root@linuxidc Python-2.7.6]# ln -s /usr/local/python27/bin/python /usr/bin/

[root@linuxidc Python-2.7.6]# python

Python 2.7.6 (default, Mar 21 2014, 01:00:09) 

[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>>

此时已经可以正常使用python2.7了，但是因为yum是使用的2.4的版本来用的，现在输入一下yum就会报错

[root@linuxidc Python-2.7.6]# yum

There was a problem importing one of the Python modules

required to run yum. The error leading to this problem was:

  No module named yum

Please install a package which provides this module, or

verify that the module is installed correctly.

It's possible that the above module doesn't match the

current version of Python, which is:

2.7.6 (default, Mar 21 2014, 01:00:09) 

[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)]

If you cannot solve this problem yourself, please go to 

the yum faq at:

  http://wiki.linux.duke.edu/YumFaq
5.修改yum

[root@linuxidc Python-2.7.6]# vim /usr/bin/yum

#!/usr/bin/python  #修改此处为2.4的位置

[root@linuxidc Python-2.7.6]# vim /usr/bin/yum

#!/usr/bin/python2.4

yum 可以使用了!

[root@linuxidc Python-2.7.6]# yum

Loaded plugins: rhnplugin, security

You need to give some 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

erase          Remove a package or packages from your system

groupinfo      Display details about a package group

groupinstall  Install the packages in a group on your system

grouplist      List available package groups

groupremove    Remove the packages in a g
4000
roup from your system

help          Display a helpful usage message

info          Display details about a package or group of packages

info-security  Returns security data for the packages listed, that affects your system

install        Install a package or packages on your system

list          List a package or groups of packages

list-security  Returns security data for the packages listed, that affects your system

localinstall  Install a local RPM

makecache      Generate the metadata cache

provides      Find what package provides the given value

reinstall      reinstall a package

repolist      Display the configured software repositories

resolvedep    Determine which package provides the given dependency

search        Search package details for the given string

shell          Run an interactive yum shell

update        Update a package or packages on your system

update-minimal Works like update, but goes to the 'newest' package match which fixes a problem that affects your system

upgrade        Update packages taking obsoletes into account

options:

  -h, --help            show this help message and exit

  -t, --tolerant        be tolerant of errors

  -C                    run entirely from cache, don't update cache

  -c  [config file]    config file location

  -R  [minutes]        maximum command wait time

  -d  [debug level]    debugging output level

  --showduplicates      show duplicates, in repos, in list/search commands

  -e  [error level]    error output level

  -q, --quiet          quiet operation

  -v, --verbose        verbose operation

  -y                    answer yes for all questions

  --version            show Yum version and exit

  --installroot=[path]  set install root

  --enablerepo=[repo]  enable one or more repositories (wildcards allowed)

  --disablerepo=[repo]  disable one or more repositories (wildcards allowed)

  -x [package], --exclude=[package]

                        exclude package(s) by name or glob

  --disableexcludes=[repo]

                        disable exclude from main, for a repo or for

                        everything

  --obsoletes          enable obsoletes processing during updates

  --noplugins          disable Yum plugins

  --nogpgcheck          disable gpg signature checking

  --disableplugin=[plugin]

                        disable plugins by name

  --enableplugin=[plugin]

                        enable plugins by name

  --skip-broken        skip packages with depsolving problems

  --security            Include security relevant packages

  --cve=CVE            Include packages needed to fix the given CVE

  --bz=BZ              Include packages needed to fix the given BZ

  --advisory=ADVISORY  Include packages needed to fix the given advisory

[root@linuxidc Python-2.7.6]#