本節點標題

1、python升級

1.1、查看原版本

1.2、下載新版本的python

1.3、解壓縮 以及編譯

1.4、覆蓋原來的python鏈接

1.5、修復yum

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1、python升級

linux操作系統大多自帶python。

下面以python2.4升級python2.7為例子講解操作。

1.1、查看原版本

[root@local_redhat ~]# python -V

Python 2.4.0

1.2、下載新版本的python

1[root@local_redhat ~]# wget http://python.org/ftp/python/2.7.2/Python-2.7.2.tgz

1.3、解壓縮 以及編譯

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

[root@local_redhat Python-2.7.2]# ./configure --prefix=/usr/local/python27

[root@local_redhat Python-2.7.2]# make

[root@local_redhat Python-2.7.2]# make install

[root@local_redhat Python-2.7.2]# ls /usr/local/python27/ -al

total 28

drwxr-xr-x 6 root root 4096 Jul 14 00:21 .

drwxr-xr-x 20 root root 4096 Jul 14 00:17 ..

drwxr-xr-x 2 root root 4096 Jul 14 00:21 bin

drwxr-xr-x 3 root root 4096 Jul 14 00:21 include

drwxr-xr-x 4 root root 4096 Jul 14 00:21 lib

drwxr-xr-x 3 root root 4096 Jul 14 00:21 share

1.4、覆蓋原來的python鏈接

[root@local_redhat Python-2.7.2]# mv /usr/bin/python /usr/bin/python_old

[root@local_redhat Python-2.7.2]# ln -s /usr/local/python27/bin/python /usr/bin/

[root@local_redhat Python-2.7.2]# python

Python 2.7.2 (default, Jul 14 2016, 00:20:14)

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

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

>>>

1.5、修復yum

此處已經可以正常使用python2.7了

但是因為yum是使用的2.4的版本來用的，現在輸入一下yum就會報錯

[root@local_redhat ~]# 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:

2.7.2 (default, Jul 14 2016, 00:20:14)

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

If you cannot solve this problem yourself, please go to

the yum faq at:

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

所以還需要修改一下

[root@local_redhat Python-2.7.2]# vim /usr/bin/yum

#!/usr/bin/python #修改此處為2.4的位置(原來是二點幾就寫二點幾)

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

#!/usr/bin/python2.4

[root@local_redhat ~]# yum

Loaded plugins: fastestmirror

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

downgrade downgrade a package

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 group from your system

help Display a helpful usage message

info Display details about a package or group of packages

install Install a package or packages on your system

list List a package or groups of packages

localinstall Install a local RPM

此時yum 又可以使用了！

[root@local_redhat ~]# yum list

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