mysql -u root -p --auto-rehash

vi /etc/my.cnf

[mysql]
auto-rehash

yum -y install epel-release     #官方源安装
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

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

mkdir ~/.pip/

cat > ~/.pip/pip.conf <<EOF
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/

[install]
trusted-host=mirrors.aliyun.com
EOF

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

ln -s /usr/local/python/bin/python3 /usr/bin/

echo ‘export PATH=/usr/local/python/bin:$PATH‘ >> /etc/profile
source /etc/profile