Having problems unmounting your DB2 UDB V5.2 installation media file
system (CD-ROM or NFS mounted file system) on UNIX platforms?
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If you choose to install DB2 UDB V5.2 product documentation on your
UNIX operating system, an HTML search engine called NetQuestion will
also be installed (if it is not already present on your system).
If NetQuestion is not already present on your system you may find that,
after installing your DB2 product documentation, you are not able to
unmount the installation file system (typically a CD-ROM,
but NFS file systems can also be affected). This problem is caused
by NetQuestion daemons that are started during the installation
of the documentation.
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To unmount your installation file system you must stop all NetQuestion
daemons and processes.  You can do this easily by using a shell
script called db2nqadm.
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1. Download db2nqadm (use binary mode) from IBM's service ftp site to
   your system.
   If you are having problems with an NFS mounted file system, do not
   place this script in that file system.
2. As root, type db2nqadm stop and press <Enter>.  This stops all
   NetQuestion daemons and processes running on your system.
3. Unmount your file system as usual.
4. When you have finished unmounting your file system,
   type db2nqadm start and press <Enter>.  This restarts NetQuestion
   daemons and processes.