Remove older python from Ubuntu (Linux)

 My Linux machine got clogged over the time with various versions of various applications. One of them is python 2.7 and python 3 in the same time. It simply complicates the things, so I decided to remove python 2.7. I found that a safe way was:

# Remove first python2.7
sudo apt purge -y python2.7-minimal

# Since I already have python3, I want it as regular python 
sudo ln -s /usr/bin/python3 /usr/bin/python

# Similar for pip
sudo apt install -y python3-pip
sudo ln -s /usr/bin/pip3 /usr/bin/pip

# This command confirms that python is python 3
python --version

Arduino removal from Ubuntu (Linux)

If it is installed via apt-get install arduino, then use apt-get uninstall arduino .

If it is installed from a tar.gz, then use the ./uninstall.sh

If still you can find arduino among applications, then give it a try snap remove arduino