qsub:tldr:edff9

The command qsub is typically used to submit jobs to a queuing system, commonly used on high-performance computing (HPC) clusters.

In this specific command: qsub -l walltime=${1}:${2}:${3} ${script-sh}, several components can be identified:

1. qsub: This is the command itself, indicating that we want to submit a job to the queuing system.
2. -l walltime=${1}:${2}:${3}: -l specifies a resource requirement, in this case, walltime. walltime represents the maximum amount of time allowed for the job to run. The =${1}:${2}:${3} part of the option sets the specified time. Here ${1}, ${2}, and ${3} refer to the first, second, and third command-line arguments passed to the script, respectively. The format is in hours:minutes:seconds.
3. ${script-sh}: This is the name of the script file that will be executed as the job.

Overall, this command is used to submit a job to the queuing system with a specified walltime (maximum runtime) set according to the three command-line arguments, and the job will be executed using the script specified.