将linux默认python升级到2.7.4版本

第一步：下载python2.7.4版本源码：

wget http://python.org/ftp/python/2.7.4/Python-2.7.4.tgz

解压文件

[aa@localhost ~]$ tar jxvf Python-2.7.4.tar.bz2

[niuxl@localhost ~]$ cd Python-2.7.4

[niuxl@localhost Python-2.7.4]$ ls

config.guess configure Demo Grammar install-sh LICENSE Makefile.pre.in Modules Parser PCbuild Python RISCOS Tools

config.sub configure.ac Doc Include Lib Mac Misc Objects PC pyconfig.h.in README setup.py

[niuxl@localhost Python-2.7.4]$ su -

口令：

[root@localhost ~]# mkdir /usr/local/python2.7.4

[root@localhost ~]# cd /home/

[root@localhost home]# cd niuxl/Python-2.7.4

[root@localhost Python-2.7.4]# ls

config.guess configure Demo Grammar install-sh LICENSE Makefile.pre.in Modules Parser PCbuild Python RISCOS Tools

config.sub configure.ac Doc Include Lib Mac Misc Objects PC pyconfig.h.in README setup.py

编译之前，需要先安装zlib包：

[root@localhost Python-2.7.4]# yum install zlib zlib-devel

[root@localhost Python-2.7.4]# ./configure --prefix=/usr/local/python2.7.4

checking build system type... i686-pc-linux-gnu

checking host system type... i686-pc-linux-gnu

checking for --enable-universalsdk... no

checking for --with-universal-archs... 32-bit

checking MACHDEP... linux2

checking EXTRAPLATDIR...

checking for --without-gcc... no

checking for gcc... no

checking for cc... no

checking for cl.exe... no

configure: error: in `/home/niuxl/Python-2.7.4':

configure: error: no acceptable C compiler found in $PATH

缺少c编辑器

安装c编辑器：

[root@localhost Python-2.7.4]# yum install gcc

..略

注：有一个选择y和n的地方，提示是否继续下载，输入y，回车即可！

gcc安装完成

继续编译python
[root@localhost Python-2.7.4]# ./configure --prefix=/usr/local/python2.7.4

..(略)

ok编译成功

[root@localhost Python-2.7.4]# make && make install

安装成功

[root@localhost Python-2.7.4]# python -V

Python 2.4.3

目前版本依然是2.4.3，现在开始升级python，

查看python命令所在目录

[root@localhost Python-2.7.4]# whereis python

python: /usr/bin/python2.4 /usr/bin/python /usr/lib/python2.4 /usr/include/python2.4 /usr/share/man/man1/python.1.gz

将/usr/bin/python 的软连接修改为python2.4.3

[root@localhost Python-2.7.4]# mv /usr/bin/python /usr/bin/python2.4.3

[root@localhost Python-2.7.4]# python

-bash: /usr/bin/python: 没有那个文件或目录

python命令找不到，这时只需要将版本python2.7.4命令加入环境变量即可！

方式1：

修改/etc/profile加入如下两行：

PATH=$PATH:/usr/local/python2.7.4/bin

export PATH

然后

[root@localhost Python-2.7.4]# source /etc/profile

[root@localhost Python-2.7.4]# python -V

Python 2.7.4

当然也可以创建2.7.4版本的python的软连接：/usr/bin/python

[root@localhost ~]# ln -s /usr/local/python2.7.4/bin/python /usr/bin/python

亦可

ok，python升级完成

到现在为止，还有最后一件事需要做，那就是yum与python的兼容问题：

[root@localhost pipe]# vi /usr/bin/yum

#!/usr/bin/python

第一行修改为

#!/usr/bin/python2.4.3（即原始的python变更后的名字）