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fg command in Linux with examples

Last Updated : 01 Oct, 2024

The fg command in Linux is used to bring a background job into the foreground. It allows you to resume a suspended job or a background process directly in the terminal window, so you can interact with it.

fg [job_spec]

The job_spec is a way to refer to the background jobs that are currently running or suspended. Here are some common ways to specify a job:

• %n: Refers to job number n.
• %str: Refers to a job that was started by a command beginning with str.
• %?str: Refers to a job that was started by a command containing str.
• %% or %+: Refers to the current job (this is the default job operated on by fg if no job_spec is provided).
• %-: Refers to the previous job.

This is the primary use of the fg command, bringing a specified job running in the background back to the foreground. For example, if you create a dummy job using sleep 500, you can bring it back to the foreground by referencing its job number:"sleep 500" is a command which is used to create a dummy job which runs for 500 seconds.

This option displays help information for the fg command, explaining usage and available options.

The fg command is a powerful and essential tool for managing background processes in Linux. It allows users to easily bring background jobs to the foreground for interaction, making multitasking on Linux systems more efficient. The fg command provides an intuitive way to bring these jobs to the foreground.

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