NAME
bg - send to background
Synopsis
bg [PID...]
Description
Sends the specified jobs to the background. A
background job is executed simultaneously with fish, and does not
have access to the keyboard. If no job is specified, the last job
to be used is put in the background. If PID is specified, the jobs
with the specified group ids are put in the background.
The PID of the desired process is usually found by using process
globbing.
Example
bg %0 will put the job with job id 0 in the
background.