centos7.3更换python版本
1.准备[*] 系统版本
cat /etc/redhat-release
http://i2.运维网.com/images/blog/201808/08/fcaba4c22861781406dd34349d9b41c9.png
[*]安装依赖包
yum -y install wget sqlite-devel xz gcc automake zlib-devel openssl-devel epel-release
2.下载解压安装python3.6.4
wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tgz
tar zxvf Python-3.6.4.tgz
cd Python-3.6.4
./configure
make && make install
[*] 将原来的python重命名
mv /usr/bin/python /usr/bin/python.bak
[*] 创建软连接
ln -s /usr/local/bin/python3 /usr/bin/python
[*]查看python版本,已经变成3.6.4
http://i2.运维网.com/images/blog/201808/08/309dd4a0e6094d40be6a6c236cc4c1e1.png
3.解决更新python版本后yum不可用
http://i2.运维网.com/images/blog/201808/08/0367f547f1c1cd258d7774791cb2348c.png
此时需要修改usr/libexec/urlgrabber-ext-down和/usr/bin/yum两个文件
修改这两个文件里的第一行参数，将#!/usr/bin/python 改为 #!/usr/bin/python2.7后保存退出即可。
[*]完成之后yum恢复正常使用
http://i2.运维网.com/images/blog/201808/08/84a90b8786e1788b8f7a7daf8b04402d.png
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