# Node: z53, Error: Unknown node
**URL:** https://community.openpbs.org/t/node-z53-error-unknown-node/2008
**Category:** Users/Site Administrators
**Created:** [February 13, 2020, 2:45pm UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008 "2020-02-13T14:45:23Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@feacluster](https://community.openpbs.org/u/feacluster)
#### Post date: [February 13, 2020, 2:45pm UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008/1 "2020-02-13T14:45:23Z")
I successfully created the node z53 using qmgr as follows:
qmgr -c “create node z53”
Everything also looks good when I do pbsnodes -a as shown below:
z53
Mom = lustwz53
ntype = PBS
state = free
pcpus = 40
resources\_available.arch = linux
resources\_available.host = lustwz53
resources\_available.mem = 131842484kb
resources\_available.ncpus = 40
resources\_available.vnode = z53
resources\_assigned.accelerator\_memory = 0kb
resources\_assigned.hbmem = 0kb
resources\_assigned.mem = 0kb
resources\_assigned.naccelerators = 0
resources\_assigned.ncpus = 0
resources\_assigned.vmem = 0kb
resv\_enable = True
sharing = default\_shared
last\_state\_change\_time = Wed Feb 12 16:57:59 2020
last\_used\_time = Wed Feb 12 16:55:51 2020
But when I do pbsnodes z53 it gives the error:
Node: z53, Error: Unknown node
In /etc/hosts z53 is defined as:
xx.xxx.xxx.xx lustwz53 z53
I am able to submit jobs to the node. Just wondering why pbsnodes z53 doesn’t recognize the shortname?
---
### Author:  [@adarsh](https://community.openpbs.org/u/adarsh)
#### Post date: [February 13, 2020, 4:03pm UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008/2 "2020-02-13T16:03:48Z")
qmgr -c "d n z53 "
qmgr -c “create node z53 Mom=lustwz53”
pbsnodes z53 # check whether this works
Otherwise:
Please share the output of pbs\_hostn -v lustwz53
nslookup lustwz53
---
### Author:  [@vstumpf](https://community.openpbs.org/u/vstumpf)
#### Post date: [February 13, 2020, 6:57pm UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008/3 "2020-02-13T18:57:37Z")
Does `pbsnodes -v z53` work?
---
### Author:  [@feacluster](https://community.openpbs.org/u/feacluster)
#### Post date: [February 13, 2020, 9:13pm UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008/4 "2020-02-13T21:13:16Z")
Thanks, I tried your commands and here is the output below ( I’ve xxxx’ed out some stuff )
root@lustwzb34:/root # qmgr -c "d n z53 "
root@lustwzb34:/root # qmgr -c “create node z53 Mom=lustwz53”
root@lustwzb34:/root # pbsnodes z53
Node: z53, Error: Unknown node
root@lustwzb34:/root # pbs\_hostn -v lustwz53
primary name: lustwz53 (from gethostbyname())
aliases: z53
aliases: [lustwz53.xxxxx.xxx-corp.com](http://lustwz53.xxxxx.xxx-corp.com)
address length: 4 bytes
address: 10.xxx.xx.xx (783663626 dec) name: lustwz53
root@lustwzb34:/root # nslookup lustwz53
Server: 10.xxx.xx.xx
Address: 10.xxx.xx.xx#53
[lustwz53.xxxxx.xxx.net](http://lustwz53.xxxxx.xxx.net) canonical name = [lustwz53.xxxxxx.xxx-corp.com](http://lustwz53.xxxxxx.xxx-corp.com).
Name: [lustwz53.xxxxxx.xxx-corp.com](http://lustwz53.xxxxxx.xxx-corp.com)
Address: 10.xxx.xx.xx
---
### Author:  [@feacluster](https://community.openpbs.org/u/feacluster)
#### Post date: [February 13, 2020, 9:14pm UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008/5 "2020-02-13T21:14:09Z")
> [@vstumpf](#):
>
> Does `pbsnodes -v z53` work?
Interestingly, yes that did work!
root@lustwzb34:/root # pbsnodes -v z53
z53
Mom = lustwz53
Port = 15002
pbs\_version = 18.1.2
ntype = PBS
state = free
pcpus = 40
resources\_available.arch = linux
resources\_available.host = lustwz53
resources\_available.mem = 131842484kb
resources\_available.ncpus = 40
resources\_available.vnode = z53
resources\_assigned.accelerator\_memory = 0kb
resources\_assigned.hbmem = 0kb
resources\_assigned.mem = 0kb
resources\_assigned.naccelerators = 0
resources\_assigned.ncpus = 0
resources\_assigned.vmem = 0kb
resv\_enable = True
sharing = default\_shared
last\_state\_change\_time = Thu Feb 13 16:06:03 2020
root@lustwzb34:/root # pbsnodes z53
Node: z53, Error: Unknown node
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### Author:  [@vstumpf](https://community.openpbs.org/u/vstumpf)
#### Post date: [February 14, 2020, 12:47am UTC](https://community.openpbs.org/t/node-z53-error-unknown-node/2008/6 "2020-02-14T00:47:04Z")
I guess PBS is using the primary name for the compute node, instead of the z53 alias.
pbsnodes takes a host list, which the server must be comparing whatever Mom is set to.
The -v option of pbsnodes tells it to use vnode names, and since you create a vnode with the name z53, it works.