fg command in linux used to put a background job in foreground.
job_spec may be:
%n: Refer to job number n.
%str: Refer to a job which was started by a command beginning with str.
%?str: Refer to a job which was started by a command containing str.
%% or %+: Refer to the current job. fg and bg will operate on this job if no job_spec is given.
%-: Refer to the previous job.
fg command :
- fg [JOB_SPEC] : This command is used to put the mentioned job running inbackground to foreground.
“sleep 500” is a command which is used to create a dummy job which runs for 500 seconds.
- fg –help : It displays help information.