If the file system being unshared is a symbolic link to a valid pathname, the canonical path (the path which the symbolic link follows) will be unshared.
For example, if /export/foo is a symbolic link to /export/bar (/export/foo -> /export/bar), the following unshare command will result in /export/bar as the unshared pathname (and not /export/foo
example# unshare -F nfs /export/foo
For file systems that are accessed by NFS Version 4 clients, once the unshare is complete, all NFS Version 4 state (open files and file locks) are released and unrecoverable by the clients. If the intent is to share the file system after some administrative action, the NFS daemon (nfsd
) should first be stopped and then the file system unshared. After the administrative action is complete, the file system would then be shared and the NFS daemon restarted. See nfsd(8)