Background Processes in Linux: Understanding the Power of bg Command（linuxbg）
When you need to do something that requires a lot of computing power or that will run for a long time, it’s important to understand how background processes work in the Linux operating system. In this article, we’ll be discussing the ‘bg’ command, which is used to execute tasks in the background.
Background processes are those that run in the background and are given low priority as compared to other processes running on a Linux system. The system allocates less resources to background processes so they can run without hindering other tasks. This is especially useful when you need to run a task that takes a long time or requires a lot of processing power because it will not slow down the computer while it is running.
The command bg is used to start a background process. It takes the PID (process ID) of the running process as an argument. It also changes the priority of the process from ‘foreground’ to ‘background’ so it can start running in the background with minimal disturbance to other tasks.
When a task is running in the background, the User Interface will show its status as either “Running” or “Suspended”. If a task is “Suspended”, it will not be running until the user resumes it from the command line. Resuming a process simply requires running ‘fg [PID]’, which is the opposite of bg.
To put a process in the background, users can use the ampersand character (&) after the command. For example, if we wanted to start a long running task in the background, we could do something like this:
$ ./long_task &
This will put the task in the background and also prints out the PID for the process. The output of this command will look something like this:
[1] 17912
The number ‘[1]’ is the job number and ‘17912’ is the PID of the process. If users need to reference this process later, we can use the job number or the PID.
If users need to pause, resume, stop, or list all the background processes, they can use the ‘jobs’ command. This command allows users to easily manage their background processes.
In conclusion, the Linux operating system provides users with the ‘bg’ command to execute tasks in the background. It also allows users to pause, resume, stop, and list all of their background processes using the ‘jobs’ command. With this feature, users can make full use of their system resources without disrupting their workflow.
