NFS Problem!

[Mike_21]

I am having troublen with mounting an NFS filesystem. The client mounts the filesystem fine, and it shows up when I do a bdf, however, when I change to the NFS mounted directory and do an ls I get

#ls
. not found

Could the permissions be a problem?
Any tips to troubleshoot this?

Thanks

[Satish Y]

U try to open a file for ex. with vi editor and if u are able to do it it is definitely due to permission problem, try to give atleast "rx" permission or if possible(acceptable) u should give root permission to exported directories.

Cheers...
Satish.

[Kamlesh Shete]

You are probably trying to list the contents of the directory as root. The problem is with permissions in the /etc/exports file on the NFS server:

On the NFS server, edit the /etc/exports file and for the entry of the filesystem, add this:

root=clientmachinename

then run the command exportfs -a and this should work

- KS

[W.C. Epperson]

Of course, when deciding whether to export the filesystem with root access, you need to understand that by doing so you effectively give root on the server to anyone with root on a client (if they can execute a command on the server in any fashion). One simple exploit is to put a copy of /usr/bin/ksh in the NFS mount, then chown it to root and chmod it to setuid. Instant root on the exporting system.

[Victor_5]

If you can not list the contents, that means you did not get the read permission, it is seems that it is a permission problem. Two files you need check:

1. on NFS server
/etc/exports
check what is the permission for exported files or directories:ro, rw, or root, see man exports for details.

2. mount options
when you mount a file system by using mount command, the default permission is rw, however, you can change it when you need, so check your mount options

Another point I would like to mention is the mount point, if the mount point is not empty, after you mount a file system on this mount point, you can not see the previous contents of the same mount point, so try to use an empty mount point when you mount a file system from NFS server.

[Sachin Patel]

Hi Mike,
Sure it is permission problem.
test: allow permission to everyone.
vi /etc/exports and add only filesystem
/myfiles
#exportfs -va
If it is not working with permissions check your patch.
I had a problem that when I add netgroup in exports file the client can't see the files on that directorys. Installed PHNE_22125 patch and it works now.

Sachin

[Jim Hendrick]

Hi,
One thing that I have run across that I do not see mentioned here is the permissions for the *underlying* mount point.

I have seen problems with (for example, on the client):

ls -ald /mountpoint
dr-xr-x--- 2 root sys /mountpoint

mount server:/filesystem /mountpoint

ls -ald /mountpoint
drwxrwxr-x root sys /mountpoint

and yet have permission problems (similar to what you describe) occur within the filesystem mounted on /mountpoint...

Hope this helps.

Jim H.