Add commands for session

swc/exercises/commands.md

+## Identifying our computer
+
+```
+hostname
+```
+
+## Our first SLURM job
+
+```
+srun hostname
+```
+
+## Exploring our example program
+
+```
+./hpc_example.py -t 10 -l 100
+```
+
+## Running example program on on the cluster
+
+```
+srun ./hpc_example.py -t 10 -l 100
+```
+
+## Submitting a job to the background
+
+```
+sbatch ./hpc_example.py -t 60 -l 100
+```
+
+## Viewing running jobs
+
+```
+squeue
+squeue --Format="JobID:6,UserName:15,State:10,Reason:10,TimeUsed:6,NodeList"
+```
+
+Redirecting output
+
+```
+sbatch --output=output.txt ./hpc_example.py -t 20 -l 100
+```
+
+## Creating a larger list
+
+```
+sbatch --output=output.txt ./hpc_example.py -t 30 -l 50000000
+```
+
+## Examing default limits
+
+```
+scontrol show partition
+```
+
+## Requesting Additional Resources
+
+```
+sbatch --mem=500 --output=output.txt ./hpc_example.py -t 30 -l 50000000
+```
+
+## reserving a LARGE amount of memory
+
+```
+sbatch --mem=8000 --output=output.txt ./hpc_example.py -t 30 -l 50000000
+```
+
+## Interactive jobs
+
+```
+srun --pty bash
+```
+
+## Limits apply to interactive jobs too
+
+```
+srun --mem=250 --pty bash
+./hpc_example.py -t 30 -l 50000000
+```
+
+## Job dependencies
+
+```
+jid=$(sbatch --parsable batch_job.sh)
+
+sbatch --dependency=afterok:$jid batch_job.sh
+```