The qstat command in Linux is used to display the status of jobs in a batch system, such as PBS or Torque. This command can be used to view information about the jobs that are currently in the queue, running, or have completed.

Here are some examples of how qstat can be used:

• To display information about a single job by specifying its job ID:

qstat 12345

• To display information about multiple jobs by specifying their job IDs:

qstat 12345 12346 12347

• To display information about all of the jobs that belong to a specific user:

qstat -u username

• To display information about all of the jobs that belong to the current user:

qstat -u $(whoami)

• To display information about all of the jobs that are currently in the queue:

qstat -q

• To display information about all of the jobs that are currently running:

qstat -r

• To display a brief summary of all of the jobs in the queue:

qstat -f

It’s worth noting that different batch systems may have different options and syntax for the qstat command. Also, the qstat command can be used in conjunction with other commands to take action on the selected jobs. For example, you can use the qdel command to delete the selected jobs or qhold command to hold them.

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230. Linux Commands and Examples