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I am exporting my /opt/target directory via NFS but I would like the nfs clients to be able to mount it as /target. i.e. I would like showmount -e to show /target not /opt/target. Can that be done?

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up vote 4 down vote accepted

I'm pretty sure NFS does not allow for aliases. Symlinking is probably best, and it'll save you from moving the export as a whole to an illogical location (/target).

The original suggestion here was to symlink /opt/target to /target and then export /target. NFS supports this and I don't know of any good reasons not to use symlinks this way.

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I have done this and it works well as long as you remember that symlinks in the exported directory will not be translated. If you've got a relative link to ../../../bar and your NFS mount is a symlink to /foo, then anything looking at /foo/bar will actually try to look in /foo/../../../bar – Matt Simmons Jun 17 '09 at 14:54
I looked far and wide for 'aliasing' but did not find anything for NFS. I also originally entered an answer which suggested symlinking, however when I did showmount -e it showed the original directory anyway, so symlinking does not appear to work as an 'alias' either. – Dave Drager Jun 17 '09 at 14:57

What you want is how NFSv4 works. In NFSv4, all the directories exported are from a single pseudo-filesystem where the real directories are mounted with --bind. See the Ubuntu NFSv4 Howto for an example.

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You would need to change the path on the server. I'm not sure if you can export via a symlink, otherwise you'd need to move the path physically on the server. Looking at the man page for exports, you might be able to use the "refer" option.

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