| job | Various commands for working with background jobs.
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| job flush | Clear this job's mailbox.
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| job id | Get id of current job.
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| job kill | Kill a background job.
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| job list | List background jobs.
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| job recv | Read a message from a job's mailbox.
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| job send | Send a message to the mailbox of a job.
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| job spawn | Spawn a background job and retrieve its ID.
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| job tag | Add a description tag to a background job.
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| job unfreeze | Unfreeze a frozen process job in foreground.
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| unlet | Delete variables from nushell memory, making them unrecoverable.
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