If I'd be exact that's a trains agent task that creates in a new subprocess another trains agent task

They all "inherit" the same user / environment from one another

Well the original task is run with my user

So I'd guess they would inherit my user as well

correct

But that's not the case

Could you maybe check this?

Run a remote task with trains agent that would create inside another task that would again run remotely as well and check the permissions of the second task created file?

The agent cannot use another user (it literally has no way of getting credentials). I suspect this is all a by product of the actual mount point)

So what can I do?

create inside another task that would again run remotely

This Task will be run on another node, user / permissions will be dealt with by the agent on the other node running the Task

Changing the mountpoint for the agent is not possible

For me

You cannot change the user once you have mount the shared folder with wither CIFS or NFS

This is an OS restriction 😞

SmarmySeaurchin8 what's the mount command you are using?

mountpoint -q A && echo "" || mount B A

what does mount -a return ?

Well nothing special, asks for password for some mounts, but not the one discussed, I am also required to run mount -a via root.

My bad I meant the output of mount

Well nothing special, only says it's nfs version 3

nfs version 3

That's the thing, NFS will automatically set file access and flags based on the mount options you cannot change them post mount.
How about creating a new user just for the agent, it makes sense from security / credentials perspective

Sounds interesting. In that case, how could I configure the agent to use such user?

You actually have to login/ssh under said user, have another dedicated mountpoint and spin the agent from that user.

Hmm, could this happen because I bring the agent up through crontab on reboot then? (with sudo crontab -e)

Yes, it could, crontab uses the user it is running from (root if used with sudo)

If that's so, why would root cause the user to become nobody with group nogroup?

I'm not sure I fully follow

why would root cause the user to become nobody with group nogroup?

It is exactly the case, they inherit the cron service user (uid/gid) which would look like nobody/nogroup

I see. Let me try that and get back to you