# PBS installation on a single execution host

**URL:** <https://community.openpbs.org/t/pbs-installation-on-a-single-execution-host/2600>\
**Category:** Users/Site Administrators\
**Created:** [April 27, 2021, 3:43am UTC](https://community.openpbs.org/t/pbs-installation-on-a-single-execution-host/2600 "2021-04-27T03:43:42Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**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, 5:39pm UTC](https://community.openpbs.org/t/pbs-installation-on-a-single-execution-host/2600/5 "2023-02-23T17:39:21Z")

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> [@vinay](#):
>
> it stays in unknown state. not able to figure it out.

1. check with firewall / selinux disabled and system rebooted (if you disable selinux)
2. DNS / hosts file is all good
3. check pbs\_mom service is up and running on the compute node ( ps -ef | grep pbs\_ )
4. check the mom logs
5. check the server logs
6. check ports 15001 to 15009 , 17001 are not blocked (between pbs server and pbs mom )

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