刚刚把java环境配了，现在配python环境
因为centos7自带python2的环境
所以我们需要更新一下系统自带的版本
python官网：https://www.python.org
1. 进入/opt/software-install，使用wget命令下载python[root@cx software-install]# wget https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tgz [root@cx software-install]# ls jdk-8u221-linux-x64.rpm Python-3.6.3.tgz2. 解压到/opt/software下，更名为python
[root@cx software-install]# tar -zxvf Python-3.6.3.tgz -C /opt/software [root@cx software]# ls java python3. 进入到python目录下，安装配置
[root@cx python]# ./configure
等待执行完毕
4. 编译并安装[root@cx python]# make [root@cx python]# make install5. 查看python3安装的位置
[root@cx python]# ll /usr/local/bin/python* lrwxrwxrwx 1 root root 9 Nov 11 22:13 /usr/local/bin/python3 -> python3.6 -rwxr-xr-x 2 root root 12650320 Nov 11 22:12 /usr/local/bin/python3.6 lrwxrwxrwx 1 root root 17 Nov 11 22:13 /usr/local/bin/python3.6-config -> python3.6m-config -rwxr-xr-x 2 root root 12650320 Nov 11 22:12 /usr/local/bin/python3.6m -rwxr-xr-x 1 root root 3097 Nov 11 22:13 /usr/local/bin/python3.6m-config lrwxrwxrwx 1 root root 16 Nov 11 22:13 /usr/local/bin/python3-config -> python3.6-config
[root@cx python]# which python /usr/bin/python [root@cx python]# ll /usr/bin/python* lrwxrwxrwx 1 root root 22 Nov 11 22:20 /usr/bin/python -> /usr/local/bin/python3 lrwxrwxrwx 1 root root 9 Jul 11 2019 /usr/bin/python2 -> python2.7 -rwxr-xr-x 1 root root 7216 Jun 21 2019 /usr/bin/python2.7 -rwxr-xr-x 1 root root 1835 Jun 21 2019 /usr/bin/python2.7-config lrwxrwxrwx 1 root root 16 Jul 11 2019 /usr/bin/python2-config -> python2.7-config lrwxrwxrwx 1 root root 7 Jul 11 2019 /usr/bin/python.bak -> python2 lrwxrwxrwx 1 root root 14 Jul 11 2019 /usr/bin/python-config -> python2-config
这里我已经配置好了，所以可以看到我的软链接已经指向我新的python3，旧的话应该指的是python2
6. 备份原有配置，设置python默认版本号为3.xmv /usr/bin/python /usr/bin/python.bak ln -s /usr/local/bin/python3 /usr/bin/python7. 这里使用python -V可以看到版本为python3了 8. 查看python2的位置
[root@cx python]# ll /usr/bin/python* lrwxrwxrwx 1 root root 22 Nov 11 22:20 /usr/bin/python -> /usr/local/bin/python3 lrwxrwxrwx 1 root root 9 Jul 11 2019 /usr/bin/python2 -> python2.7 -rwxr-xr-x 1 root root 7216 Jun 21 2019 /usr/bin/python2.7 -rwxr-xr-x 1 root root 1835 Jun 21 2019 /usr/bin/python2.7-config lrwxrwxrwx 1 root root 16 Jul 11 2019 /usr/bin/python2-config -> python2.7-config lrwxrwxrwx 1 root root 7 Jul 11 2019 /usr/bin/python.bak -> python2 lrwxrwxrwx 1 root root 14 Jul 11 2019 /usr/bin/python-config -> python2-config9. 为了使yum命令正常使用，需要将其配置的python依然指向2.x版本
/usr/bin/yum
/usr/libexec/urlgrabber-ext-down
将上面两个文件的头部文件修改为老版本即可
!/usr/bin/python --> !/usr/bin/python2.7
