How do I update Python 3.9 to Linux?

Perform the below-given steps to install Python 3.9 on Linux Mint 20 from the deadsnakes repository:

1. Step 1: Update apt cache. Fire up the terminal and update the apt cache with the command: …
2. Step 2: Install the dependencies. …
3. Step 3: Add PPA repository. …
4. Step 4: Install Python 3.9. …
5. Step 5: Verify the Python 3.9 installation.

How do I update python to latest Ubuntu?

So lets start:

1. Step 0: Check the current python version. Run below command to test the current version installed of python. …
2. Step 1: Install python3.7. Install python by typing: …
3. Step 2: Add python 3.6 & python 3.7 to update-alternatives. …
4. Step 3: Update python 3 to point to python 3.7. …
5. Step 4: Test the new version of python3.