# Create file in $PBS\_O\_WORKDIR **URL:** \ **Category:** Users/Site Administrators\ **Created:** [February 23, 2023, 6:08am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452 "2023-02-23T06:08:14Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![bhushan27](https://avatars.discourse-cdn.com/v4/letter/b/8baadc/32.png) [@bhushan27](https://community.openpbs.org/u/bhushan27)\ **Post date:** [February 23, 2023, 6:08am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/1 "2023-02-23T06:08:14Z")
Hello, I want to create file in $PBS\_O\_WORKDIR few minutes before specified walltime exceeds. anyone have idea about above query please let me know. Thank you in advance. ---
**Author:** ![adarsh](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@adarsh](https://community.openpbs.org/u/adarsh)\ **Post date:** [February 23, 2023, 6:02pm UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/2 "2023-02-23T18:02:45Z")
> [@bhushan27](#): > > I want to create file in $PBS\_O\_WORKDIR few minutes before specified walltime exceeds. 1. server periodic hook or cronjob 2. implement some kind of timer within the script, when it is about to hit the 98% threshold of your requested walltime , then write a file. ---
**Author:** ![bhushan27](https://avatars.discourse-cdn.com/v4/letter/b/8baadc/32.png) [@bhushan27](https://community.openpbs.org/u/bhushan27)\ **Post date:** [March 6, 2023, 7:13am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/4 "2023-03-06T07:13:56Z")
@adarsh Thank you for possible solutions, 1. If i go with hooks, how we can implent this hooks for specific jobs instead of all jobs on cluster. ---
**Author:** ![adarsh](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@adarsh](https://community.openpbs.org/u/adarsh)\ **Post date:** [March 6, 2023, 7:47am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/5 "2023-03-06T07:47:37Z")
> [@bhushan27](#): > > 1. If i go with hooks, how we can implent this hooks for specific jobs instead of all jobs on cluster. Specific jobs needs to be tagged for this , requesting - for example specific user or list of users – for example specific software or list of softwares – for example specific queue or queue(s) ---
**Author:** ![bhushan27](https://avatars.discourse-cdn.com/v4/letter/b/8baadc/32.png) [@bhushan27](https://community.openpbs.org/u/bhushan27)\ **Post date:** [March 7, 2023, 5:39am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/6 "2023-03-07T05:39:13Z")
And can I fetch job\_ib in submission script after qsub command, As right now I’m trying to echo $PBS\_JOBID but it is showing my remote session jobid through which I’m submitting my job. ---
**Author:** ![speleolinux](https://avatars.discourse-cdn.com/v4/letter/s/779978/32.png) [@speleolinux](https://community.openpbs.org/u/speleolinux)\ **Post date:** [March 8, 2023, 6:23am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/7 "2023-03-08T06:23:47Z")
Hi A hook is the best way but for a quick and dirty way you could implement it using bash within the submission script: 1. At the start of the PBS sub script get the system time, add 95% of walltime to get the time at which to create the directory. This can be done using bash arithmetic. 2. Set a user cron job to create the directory at that time. 3. The rest of the submission script is your normal commands. A hack but it would probably work with little effort. Might be helpful: [shell - How to create a cron job using Bash automatically without the interactive editor? - Stack Overflow](https://stackoverflow.com/questions/878600/how-to-create-a-cron-job-using-bash-automatically-without-the-interactive-editor) Mike ---
**Author:** ![bhushan27](https://avatars.discourse-cdn.com/v4/letter/b/8baadc/32.png) [@bhushan27](https://community.openpbs.org/u/bhushan27)\ **Post date:** [April 4, 2023, 5:15am UTC](https://community.openpbs.org/t/create-file-in-pbs-o-workdir/3452/8 "2023-04-04T05:15:48Z")
@speleolinux @adarsh Actually i created script and merged this script with job submission script but now i stuck on 1 things, 1. How we can get start time of queued job right after job submission, as using qstat -f we can’t get start time until job gets start execution.