install python linux
In RHEL & CENTOS::
Step 1: Open a Terminal and add the repository to your Yum install.
sudo yum install -y https://repo.ius.io/ius-release-el7.rpm
Step 2: Update Yum to finish adding the repository.
sudo yum update
Step 3: Download and install Python.
sudo yum install -y python36u python36u-libs python36u-devel python36u-pip
For verification ::
python3.6 -V
In ubuntu ::
$ sudo apt-get update
$ sudo apt-get install python3.6