1. yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-develdb4-devel libpcap-devel xz-devel gcc
    3. mkdir /usr/download
    5. cd /usr/download
    7. wget https://www.python.org/ftp/python/3.8.5/Python-3.8.5.tgz
    9. tar -xvf Python-3.8.5.tgz
    11. mkdir /usr/local/python3
    13. pwd
    15. cd Python-3.8.5
    17. ./configure --prefix=/usr/local/python3
    19. make
    21. make install
    23. python -V
    25. 以上完成 python 的升级
    26. 下面开始配置 pip3
    28. vim ~/.bash_profile
    30. 将/usr/local/python3/bin加入PATH#  vim ~/.bash_profile
    32. PATH=$PATH:$HOME/bin:/usr/local/python3/bin
    35. 完成

    最后修复 yun命令

    1. # 打开文件
    2. vi /usr/bin/yum
    4. # 修改
    5. #!/usr/bin/python  改成  #!/usr/bin/python2.7
    8. # 打开文件 
    9. vi /usr/libexec/urlgrabber-ext-down
    11. # 修改
    12. #!/usr/bin/python  改成  #!/usr/bin/python2.7