To attach (or reattach) to the output of a Slurm job that was started with sbatch, you typically use the sattach command. This allows you to connect to the job's standard input, output, and error streams, similar to how you would interact with a terminal session.

How to Use sattach

1. Find Your Job ID First, you need the job ID of the running Slurm job. You can find this using:

   bash

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   squeue -u $USER

   This will list your jobs along with their IDs.

2. Attach to the Job Once you have the job ID, use:

   bash

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   sattach <job_id>

   Replace <job_id> with the actual job ID.

   For example:

   bash

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   sattach 12345

3. Detach from the Job To detach, press Ctrl+C or use the escape sequence ~. (tilde followed by a dot) if you are using a terminal multiplexer like screen or tmux.

Important Notes

• Job Must Be Running: sattach only works if the job is currently running. If the job has finished, you cannot attach to it.
• Interactive Jobs: sattach is most useful for interactive jobs or jobs that produce ongoing output.
• Terminal Issues: If the job was not started with --pty or similar options, attaching may not work as expected.
• Permissions: You must be the owner of the job or have admin privileges to attach to it.

Example Workflow

# Submit a job
sbatch --pty my_script.sh

# Find the job ID
squeue -u $USER

# Attach to the job
sattach 12345