create file problem
 

in my new server , there is a directory , it is strange that when I use root user to create directory in it , the owner is nfsnobody , now I want to change the owner to edp user but it do not allow , the error is "operation no permitted" , can advise what is wrong ?

I tried to restart nfs , but still not work .

Thx.

Do you mean "edp user" literally? I would imagine that the space would be an issue.

I assume that using "chown" to change the user on a file requires that the new username exists in /etc/passwd

No , I use the command

chown edp:user directory

but it is not work , I found the server is mounting to another server , but I can't find the mount by /etc/mtab /etc/fstab , df command , I re-started the nfs many times but still not work . thx

nfsnobody means its nfs mounted, with the secure default of root_squash option.
If you unmount it, you'll see the normal permissions/ownerships and be able to change it.
I assume you're on the nfs server here.