gfortran-multilib software package provides GNU Fortran 95 compiler (multilib files), you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gfortran-multilib
gfortran-multilib is installed in your system.
Make ensure the gfortran-multilib package were installed using the commands given below,
$ sudo dpkg-query -l | grep gfortran-multilib *
You will get with gfortran-multilib package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Development |
| Package | gfortran-multilib |
| Version | 4:5.3.1-1ubuntu1 |
| Description | GNU Fortran 95 compiler (multilib files) |
| Sub Section | Devel |