job.json

{
    "job": {
        "type": "Microsoft.Batch/batchAccounts/jobs",
        "apiVersion": "2016-12-01",
        "properties": {
            "id": "myjob",
            "constraints": {
                "maxWallClockTime": "PT5H",
                "maxTaskRetryCount": 1
            },
            "poolInfo": {
                "poolId": "mypool"
            },
            "taskFactory": {
                "type": "parametricSweep",
                "parameterSets": [{
                    "start": 1,
                    "end": 10,
                    "step": 1
                }],
               "repeatTask": {
                 "commandLine": "/bin/bash -c 'echo Hello world from task {0}; sleep 120'",
                    "constraints": {
                        "retentionTime":"PT1H"
                    },
                    "containerSettings": {
                        "imageName": "ubuntu:20.04"
                    }
                }
            },
            "onAllTasksComplete": "terminatejob"
        }
    }
}