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Top Forums UNIX for Dummies Questions & Answers Creating a Shortcut in a User Driectory Post 1610 by Neo on Monday 19th of March 2001 07:59:40 PM
Old 03-19-2001
One correct way to communicatin is to say 'create a link'. There are two primary kinds of links, hard links and symbolic links. Directories are normally linked by symbolic links; files by hard links, but not always and YMMV. For example:

Your mail spool directory (located at /usr/spool/mail for example) is always full of big files and filling up your disk partition. You go out to ebay and purchase a 60GB drive for $100 bucks from SuperHardDisks.com. You pay with Paypal and it ships the same day Smilie

When it arrives, you have a spare slave port on one of your EIDE channels, so you power down and add the slave device and reboot. The drive is recognized by the BIOS (yippie!), so you run FDISK and create one big 60GB partition (because you get a lot of mail, mostly from spammers offering the fountain of youth and freedom from worries forever!!!).

You then create a directory (normally in the root partition) and then mount the new partition, call it (/usr/spool/supermaildisk). Then you shutdown your mail daemon and move all the mail in /usr/spool/mail to /usr/spool/supermaildisk. Then you remove the /usr/spool/mail directory and create a new symbolic link from /usr/spool/supermail to /usr/spool/mail.
You test to make sure you did not fat-finger any commands and make some goofy error, restart your mail daemon and 'poof!!', you just increased your mail spool directory to many GB.

Perhaps someone else will explain hard links and files, how to use symbolic links for library files, and other exciting fun with links Smilie

[Edited by Neo on 03-19-2001 at 08:04 PM]
 

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FS_LSMOUNT(1)						       AFS Command Reference						     FS_LSMOUNT(1)

NAME
fs_lsmount - Reports the volume for which a directory is the mount point. SYNOPSIS
fs lsmount -dir <directory>+ [-help] fs ls -d <directory>+ [-h] DESCRIPTION
The fs lsmount command reports the volume for which each specified directory is a mount point, or indicates with an error message that a directory is not a mount point or is not in AFS. To create a mount point, use the fs mkmount command. To remove one, use the fs rmmount command. OPTIONS
-dir <directory>+ Names the directory that serves as a mount point for a volume. The last element in the pathname provided must be an actual name, not a shorthand notation such as one or two periods ("." or ".."). -help Prints the online help for this command. All other valid options are ignored. OUTPUT
If the specified directory is a mount point, the output is of the following form: '<directory>' is a mount point for volume '<volume name>' where o A number sign ("#") precedes the <volume name> string for a regular mount point. o A percent sign ("%") precedes the <volume name> string for a read/write mount point. o A cell name and colon (":") follow the number or percent sign and precede the <volume name> string for a cellular mount point. The fs mkmount reference page explains how the Cache Manager interprets each of the three types of mount points. If the directory is a symbolic link to a mount point, the output is of the form: '<directory>' is a symbolic link, leading to a mount point for volume '<volume name>' If the directory is not a mount point or is not in AFS, the output reads: '<directory>' is not a mount point. If the output is garbled, it is possible that the mount point has become corrupted in the local AFS client cache. Use the fs flushmount command to discard it, which forces the Cache Manager to refetch the mount point. EXAMPLES
The following example shows the mount point for the home directory of user "smith": % fs lsmount /afs/abc.com/usr/smith '/afs/abc.com/usr/smith' is a mount point for volume '#user.smith' The following example shows both the regular and read/write mount points for the ABC Corporation cell's "root.cell" volume. % fs lsmount /afs/abc.com '/afs/abc.com' is a mount point for volume '#root.cell' % fs lsmount /afs/.abc.com '/afs/.abc.com' is a mount point for volume '%root.cell' The following example shows a cellular mount point: the State University cell's "root.cell" volume as mounted in the ABC Corporation cell's tree. % fs lsmount /afs/stateu.edu '/afs/stateu.edu' is a mount point for volume '#stateu.edu:root.cell' PRIVILEGE REQUIRED
The issuer must have the "l" (lookup) permission on the ACL of the root directory of the volume that houses the file or directory named by the -dir argument, and on the ACL of each directory that precedes it in the pathname. SEE ALSO
fs_flushmount(1), fs_mkmount(1), fs_rmmount(1) COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. OpenAFS 2012-03-26 FS_LSMOUNT(1)
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