方法一

#### 安装相关依赖软件（需要配置yum官方或者阿里源进行安装）

```
1 yum -y install epel-release
2 yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel gcc
```

#### 下载python安装包（自己下载过可以忽略此步骤）

```
1 wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz
```

#### 创建目录，并添加配置

```
1 mkdir ~/.pip/
2 
3 cat > ~/.pip/pip.conf <<EOF
4 [global]
5 index-url = https://mirrors.aliyun.com/pypi/simple/
6 
7 [install]
8 trusted-host=mirrors.aliyun.com
9 EOF
```

#### 安装相关依赖软件，解压python软件包并进行编译安装

```
1 yum -y install libffi-devel zlib* python-devel openssl-devel
2 tar -zxvf Python-3.9.0.tgz
3 cd Python-3.9.0/
4 ./configure --prefix=/usr/local/python --with-ssl
5 make && make install 
```

#### 优化路径，安装pip3

```
1 ln -s /usr/local/python/bin/python3 /usr/bin/
2 
3 echo 'export PATH=/usr/local/python/bin:$PATH' >> /etc/profile    
4 source /etc/profile
5 
6 pip3 install mycli
```

#### 登录测试

```
1 mycli -u root -p <密码>
```

方式二：临时使用自动补全功能

mysql -u root -p  --auto-rehash

方式三：永久使用自动补全功能

vim /etc/my.cnf
[mysql]
auto-rehash