python3_9_setup_centos_7.sh

#!/bin/bash

# Script to install Python 3.9 on CentOS 7
# Please run it as a root

# Install development tools and libraries
yum groupinstall -y "Development Tools"
yum install -y openssl-devel bzip2-devel libffi-devel

# Download Python 3.9 source code
cd /usr/src
wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz

# Extract the source code tarball
tar xzf Python-3.9.0.tgz

# Compile and install Python 3.9
cd Python-3.9.0
./configure --enable-optimizations --prefix=/usr/local
make altinstall

# Add /usr/local/bin to PATH in .bashrc for future sessions
if ! grep -q "/usr/local/bin" /etc/profile; then
    echo "export PATH=/usr/local/bin:\$PATH" >> /etc/profile
fi

# Refresh environment variables
source /etc/profile

# Verify Python 3.9 installation
python3.9 -V

# Clean up the tarball
rm /usr/src/Python-3.9.0.tgz

echo "Python 3.9 installation is complete."