This little bash script updates the packages used by the following tools:

• Homebrew
• Python 2.x, 3.x
• Ruby gems

Instead of having to type this over and over again I automated the process; it checks if the command is found in your PATH and only then it tries to perform the operation.

Just download the script (or clone the repo) and run the env_upgrade.sh script. You might have to give execution privileges on the script before running depending your configuration, you can do that by using the following command:

$ chmod +x ./env_upgrade.sh

I've tested this on Unix-like systems; in particular on MacOS (> 10.10) and Ubuntu (> 15.04).