bg command is a built-in Linux command that is used to move a foreground process to run in the background. When you start a command or process in the terminal, it runs in the foreground, which means that it takes control of the terminal until it is completed or terminated. If you want to run a process in the background while still using the terminal for other tasks, you can use the
bg command to move the process to run in the background.
bg command is used to move a foreground process to run in the background. The syntax for the
bg command is as follows:
job_spec argument specifies the job that you want to move to the background. You can specify the job using its job ID or its process ID. If you do not specify a
bg command will move the most recently stopped job to the background.
To use the
bg command, you first need to start a process or command in the terminal. For example, you can start a long-running process like
rsync -avh /path/to/source /path/to/destination
rsync command is running, you can press
CTRL-Z to suspend the process and return control of the terminal to the shell prompt. You can then use the
bg command to move the
rsync process to run in the background:
In this example,
%1 is the job ID of the
rsync process. You can also use the process ID to specify the job:
In this example,
1234 is the process ID of the
Once you have moved a process to run in the background, you can continue to use the terminal for other tasks. You can view the status of background jobs using the
This will show you a list of all active jobs, including their job ID, status, and command.
bg command does not have any options.
If you are having trouble moving a process to run in the background with the
bg command, here are some troubleshooting tips:
- Make sure that you have suspended the process using
CTRL-Zbefore using the
- Check the output of the
jobscommand to make sure that the job ID or process ID you are using is correct.
- If the process is not responding, you may need to terminate it using the
killcommand before starting it again.
bgcommand only works with processes that have been suspended using
CTRL-Z. If a process is running in the foreground and you want to move it to the background, you will need to suspend it first using
- When a process is running in the background, its output will not be displayed in the terminal. If you want to view the output of a background process, you can redirect its output to a file or use the
fgcommand to bring it back to the foreground.