升级python

今天看了一下虚拟机中的python，发现还是原生的2.4.3，所以决定升级一下

[root@local_redhat ~]# 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@local_redhat ~]#

下载新版本的python

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

解压缩 以及编译

[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

覆盖原来的python链接

[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 2011, 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.
>>>

此处已经可以正常使用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@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 2011, 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

所以还需要修改一下

[root@local_redhat Python-2.7.2]# vim /usr/bin/yum
 
#!/usr/bin/python   #修改此处为2.4的位置
[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

yum 又可以使用了