2018-04-20

Centos下升级python2.7到3.6

Centos下，修改python版本，保留原2.7.5版本同时，更改默认版本为3.6

保留原版本

由于yum中会配置python版本，在进行python版本更新时，需要先将yum的配置文件都更改了。
首先，切用户

su - root

1	mv /usr/bin/python2.7 /usr/bin/python2.7.5　　# 保留默认版本python为python2.7.5

1	ln -s /usr/bin/python2.7.5 /usr/local/bin/python2.7.5　　# 创建软连接

1	ls -al /usr/bin/yum*　　# 查看/usr/bin/目录下所有yum文件，共7个

一个一个改：

1	#!/usr/bin/python —> #!/usr/bin/python2.7.5

1 2	vi /usr/libexec/urlgrabber-ext-down　　# 修改/usr/libexec/目录下 urlgrabber-ext-down #!/usr/bin/python —> #!/usr/bin/python2.7.5

安装python3.6

安装配置环境

wget

首先检查是否有安装wget，没有则需要安装：

1	yum install wget

准备编译环境

1 2	yum groupinstall 'Development Tools' yum install zlib-devel bzip2-devel openssl-devel ncurses-devel

开始安装

wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tgz
tar zxvf Python-3.6.2.tgz
cd Python-3.6.2
./configure
make all
make install
make clean
make distclean
rm -rf /usr/bin/python
rm -rf /usr/bin/python3
rm -rf /usr/bin/python3.6
ln -s /usr/local/bin/python3.6 /usr/bin/python
ln -s /usr/local/bin/python3.6 /usr/bin/python3
ln -s /usr/local/bin/python3.6 /usr/bin/python3.6
/usr/bin/python -V
/usr/bin/python3 -V
/usr/bin/python3.6 -V
rm -rf /usr/local/bin/python
rm -rf /usr/local/bin/python3
ln -s /usr/local/bin/python3.6 /usr/local/bin/python
ln -s /usr/local/bin/python3.6 /usr/local/bin/python3
python -V
python3 -V
python3.6 -V

[root@localhost Python-3.6.2]# python -V
Python 3.6.2
[root@localhost Python-3.6.2]# python3 -V
Python 3.6.2
[root@localhost Python-3.6.2]# python3.6 -V
Python 3.6.2
```
安装成功~

> [参考链接](https://blog.csdn.net/hu19921016/article/details/72236966)

本文标题:Centos下升级python2.7到3.6

文章作者:Kyle

发布时间:2018-04-20, 03:35:53

最后更新:2020-12-21, 14:39:14

原始链接:https://spindriftks.github.io/2018/04/20/Centos%E4%B8%8B%E5%8D%87%E7%BA%A7python2-7%E5%88%B03-6/

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