assuming '/a' is a symlink to '/b', and '/b' is specified as a mountpoint in /etc/fstab, an attempt to do 'mount /a' or 'mount /a/' will fail with 'mount: /a: unknown special file or file system'. however, 'umount /a' works fine. an attempt to do 'fsck /a', 'fsck /a/' or 'fsck /b/' will wail with 'fsck: Could not determine filesystem type'. 'fsck /b' works.
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped