🐍 Setting Up a Global Python Virtual Environment on Ubuntu

If you want to use a dedicated Python environment globally on your system — one that persists across terminal sessions and reboots — this guide will help you set it up cleanly and efficiently.

✅ Step 1: Create a Global Virtual Environment

Create a folder to store virtual environments if it doesn't already exist:

mkdir -p ~/.venvs
 
Then create your global virtual environment:
 
python3.10 -m venv ~/.venvs/global
 
Using ~/.venvs is a common convention for personal virtual environments.
⚙️ Step 2: Automatically Activate the Global Environment on Terminal Start
 
Add the following line to your shell configuration file (e.g., ~/.bashrc or ~/.zshrc):
 
source ~/.venvs/global/bin/activate
 
Then, apply the changes immediately by sourcing the file:
 
source ~/.bashrc    # or use source ~/.zshrc if you're using zsh
 
Now, every time you open a new terminal, your global Python virtual environment will be activated automatically.
🧪 Step 3: Use Python and pip Within This Environment
Check Python version:
 
python --version
 
Install packages:
 
pip install <package_name>
 
Packages installed this way will remain isolated from your system-wide Python installation.
📝 Notes
 
    ✅ This won’t interfere with your system Python.
 
    🔁 You can still create project-specific environments inside project folders using:
 
python -m venv .venv
 
🚫 To deactivate the global environment temporarily:
 
deactivate

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