centos7下将Python2.7.5升级到Python3.6.1以及还原

安装相关的软件包避免出现编译出错，无法编译，升级之后无法使用等情况 [root@yuhai ~]# yum install -y zlib* readline* gcc*#过程忽略 从Pytho

• 安装相关的软件包 避免出现编译出错，无法编译，升级之后无法使用等情况

[root@yuhai ~]# yum install -y zlib* readline* gcc*#过程忽略

•  从Python官网下载python3.6.1的安装包

[root@yuhai ~]# wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz--2017-03-22 22:04:24--  https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgzResolving www.python.org (www.python.org)... 151.101.72.223, 2a04:4e42:11::223Connecting to www.python.org (www.python.org)|151.101.72.223|:443... connected.HTTP request sent, awaiting response... 200 OKLength: 22540566 (21M) [application/octet-stream]Saving to: ‘Python-3.6.1.tgz’100%[====================================================================>] 22,540,566  33.4KB/s   in 12m 14s2017-03-22 22:16:40 (30.0 KB/s) - ‘Python-3.6.1.tgz’ saved [22540566/22540566][root@yuhai ~]# lsanaconda-ks.cfg  Python-3.6.1.tgz

• 解压安装包

[root@yuhai ~]# tar xf Python-3.6.1.tgz             #解压安装包[root@yuhai ~]# lsanaconda-ks.cfg  Python-3.6.1  Python-3.6.1.tgz

• 进入目录并编译在/user/local/python3.6下

[root@localhost ~]# cd Python-3.6.1[root@yuhai Python-3.6.1]# mkdir /usr/local/python3.6[root@yuhai Python-3.6.1]# ./configure --prefix=/usr/local/python3.6过程省略[root@yuhai Python-3.6.1]# make过程省略[root@yuhai Python-3.6.1]# make install过程省略

• 备份原本的python2.7.5

[root@yuhai Python-3.6.1]# mv /usr/bin/python /usr/bin/python_2.7.5

• 把编译出来的Python3.6.1的命令创建软连接到/usr/bin/python

[root@yuhai Python-3.6.1]# ln -s /usr/local/python3.6/bin/python3.6 /usr/bin/python

• 查看现在的Python版本

[root@yuhai Python-3.6.1]# python -VPython 3.6.1

• 还原到2.7.5版本

[root@a ~]# mv /usr/bin/python /usr/bin/python_3.6.1     #移动并重命名[root@a ~]# mv /usr/bin/python_2.7.5 /usr/bin/python     #移动并重命名[root@a ~]# python -V                                    #查看版本信息Python 2.7.5