background process

The article explains how to capture the Process ID (PID) of background processes in a Bash environment, especially when using pipelines. It highlights the challenges and complexities involved in capturing PIDs in such scenarios and provides practical examples of managing these processes, including monitoring their status and gracefully stopping them. The use of the special variable `$!` to obtain the PID of the last job in the background is demonstrated with scripts, aiding in robust system operations and process management.

This blog explains managing background processes in Linux, focusing on sending tasks to run in the background without `Ctrl+Z`. Ordinarily, tasks can be backgrounded using an ampersand (`&`), but already running tasks require pausing (`Ctrl+Z`) before `bg` can be used. Advanced management can be achieved through tools like `tmux` or `screen`. Understanding these techniques enhances productivity when using the terminal.