Bash - bg (background) - job resume (builtin command)

About

Resume each suspended job in the background, as if it had been started with &.

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Syntax

Resume each suspended job jobspec in the background, as if it had been started with &.

bg [jobspec ...]

where:

• jobspec If jobspec is not present, the shell’s notion of the current job is used.

Exit Status

bg jobspec returns 0 unless:

• run when job control is disabled
• or, when run with job control enabled, any specified jobspec was not found or was started without job control.