The Linux machine installers are in the form of an executable script file that have a ".run" extension, e.g. xc8-v1.20-linux.run.
The MPLAB® XC8 Compiler installer for Linux machine has an extension “.run.tar”.
Extract the file from the tar archive, and install the compiler by following the steps as:
tar -xvf xc8-v1.20-linux.tar
chmod +x xc8-v1.20-linux.run
The installer will ask for the directory in which to install the compiler.
Select the Directory and follow the installer instructions to install the Compiler.