sighup

In Linux and Unix systems, handling background processes efficiently is a crucial skill for users and administrators alike. Daemons – background processes that run independently of user sessions – can sometimes crash or terminate unexpectedly upon logout due to the SIGHUP (hangup) signal. In this article, we'll explore how to create a daemon that survives this hangup signal using the nohup and disown commands. Q1: What is a SIGHUP signal, and why does it affect running processes? A1: The SIGHUP signal is a signal sent to a process when its controlling terminal is closed. It was originally designed to notify the process of a telephone or modem hangup.