安装该命令尽可能使用普通用户 或 python的虚拟环境，因为使用root安装会破坏python环境（安装时会有提示），python环境直接影响的有yum，也就是说python环境一出问题yum就用不了，特别强调这个
[root@node1 ~]# useradd zhangsan && echo 'aaaaaa' | passwd --stdin zhangsan
[root@node1 ~]# echo 'zhangsan ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers.d/zhangsan
[root@node1 ~]# su - zhangsan
以下命令都在shangsan用户下进行
## 安装python3.9
sudo yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc libffi-devel
wget https://www.python.org/ftp/python/3.9.7/Python-3.9.7.tgz
tar -zxvf Python-3.9.7.tgz
cd Python-3.9.7
./configure --prefix=/usr/local/python3
sudo make && sudo make install
# 自带是python2.7版本，所以将名字改成了python2.7.5,这2步有风险，注意！！！
# mv /usr/bin/python /usr/bin/python2.7.5
# ln -s /usr/local/python3/bin/python3.9 /usr/bin/python
sudo ln -s /usr/local/python3/bin/python3.9 /usr/bin/python3
sudo ln -s /usr/local/python3/bin/pip3 /usr/bin/
# 基于python安装pip
sudo yum -y install python-pip python-devel
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py
pip3 install mycli
[zhangsan@controller ~]$ which mycli
~/.local/bin/mycli
mycli -u<my_user> -h<my_host.com> -p<passwd>
