Process Commands

fg Linux Command

Brings a background job to the foreground.

What does fg do?

Brings a background job to the foreground.

fg [job_id]

fg %1

How do I bring a background job to the foreground?

Use `fg %jobid` to bring a specific background job to the foreground. Without a job ID, it brings the most recent background job.

How do I see my background jobs?

Use `jobs -l` to list all jobs with their IDs and status. Use `jobs -p` to see only the PIDs.

How do I suspend a foreground job?

Press `Ctrl+Z` to suspend the currently running foreground job. Then use `bg` to resume it in the background.

How do I switch between background jobs?

Use `fg %jobid` to bring a specific job to the foreground. You can switch between multiple background jobs.

What does fg without arguments do?

Running `fg` without arguments brings the most recently backgrounded job (marked with `+` in the jobs list) to the foreground.

How do I stop a foreground job?

Press `Ctrl+C` to send SIGINT and terminate the foreground job. Use `Ctrl+Z` to suspend instead.

How do I see the PID of a foreground job?

Use `jobs -l` to see the PID alongside the job ID. You can also use `ps` to see running processes.

What is the difference between fg and bg?

`fg` brings a background job to the foreground where you can interact with it. `bg` resumes a suspended job without bringing it to the foreground.

Resumes a suspended job in the background.

Lists active jobs (background and suspended processes) in the current shell.

Sends a signal to processes based on name and other attributes.

Runs a command with a specified scheduling priority (niceness value).

Kills all processes matching a given name.

Changes the priority (niceness) of an already running process.