Chapter 6 Accessing the Harmonic MediaGrid
© 2017 Harmonic Inc. All rights reserved. 196 Harmonic MediaGrid Release 4.1
Setting up Soft Links
Viewing File and Directory Permissions on Linux
File and directory permissions are visible using the “ls” command and can be modified using the
“chmod” command. The standard commands apply for managing file permissions. As an example,
however, you can remove read permissions for all users from a file or directory by issuing the
following command:
chmod a-r <filename>
Changing File and Directory Permissions on Linux
By default the Harmonic MediaGrid Linux FSD does not reflect the Harmonic MediaGrid ACL
security permissions for a file or directory on the Harmonic MediaGrid file system. To have the
Linux FSD translate between Harmonic MediaGrid ACLs and Linux mode permission bits on files,
use the –o mode option on the mount command line. For example:
mount –t omfs /mediagrid/filesys /mnt –o
username=user1,password=pass1,mode
With this capability enabled, file permission bits may be tested and manipulated through the
normal Linux interfaces.
NOTE: Turning this capability on reduces performance related to directory access operations, such as
directory listing.
Setting up Soft Links
A soft link is a symbolic link to another file or directory.
To set up a soft link:
1. Mount the file system.
2. Change to the directory for which you want to create a link, or provide the file or directory
path.
3. Create the soft link using the following format:
ln -s <existing file name> <new file name>
For example to create a soft link to directory 1 from directory 2, you would enter the
following:
ln -s <directory 1> <directory 2>
Soft links are visible using the Harmonic ContentManager application. See the ContentManager
User’s Guide for details.
Connecting Clients to Harmonic MediaGrid Using ContentBridge
The ContentBridge provides standard interfaces to Harmonic MediaGrid for clients that do not
have the Harmonic MediaGrid File System Driver (FSD) installed, or an FSD is not available. The
supported protocols are CIFS (Common Internet File System), FTP (File Transfer Protocol) and NFS
(Network File System). These protocols allow Windows, Macintosh and Linux clients to access
media on Harmonic MediaGrid file systems.
Refer to the sections below for instructions on setting up clients to connect to Harmonic
MediaGrid using the various protocols.
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