This article describes how to write, compile and execute a "Hello World" program in Fortran on Linux (RedHat / Centos / Fedora).  1. the prerequisitesa text editor of your choice (e.g. vi)a Fortr [ ... ]

 The netstat command to list all open udp and tcp ports and the PID and name of the program to which each socket belongs is: # netstat -tulpn Use lsof to list ALL open files (directorie [ ... ]