Root user access to an exported file system
When a file system is exported, by default, the root user is not granted root access to that exported file systems.
When a root user on one host requests access to a particular file
from NFS, the user ID of the requester is mapped by NFS to the user
ID of user nobody (nobody is one
of the user names placed in the /etc/password file
by default). The access rights of user nobody are
the same as those given to the public (others)
for a particular file. For example, if others only
has run permission for a file, then user nobody can
only run the file.
To enable root user access to an exported file system, follow the
instructions in Changing an exported file system.
If you use the SMIT method, specify in the HOSTS allowed root access
field the name of the host to which you want to grant root access.
If you edit the file with a text editor, add the qualifier -root=hostname to
the file system entry. For example,
/usr/tps -root=hermesspecifies that the root user on host hermes may
access the /usr/tps directory with root privileges.