About
fg resume a job in the foreground, and make it the current job.
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Syntax
fg [jobspec]
If jobspec is not present, the shell’s notion of the current job is used.
Return value
The return value is that of;
- the command placed into the foreground,
- or failure if run when job control is disabled
- or, when run with job control enabled, if jobspec does not specify a valid job
- or jobspec specifies a job that was started without job control.