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Top Forums Shell Programming and Scripting Special group & user privileges Post 302466991 by LibRid on Thursday 28th of October 2010 01:18:58 AM
Old 10-28-2010
Special group & user privileges

Special group and user privileges help

I'm having some trouble understanding the group and user privileges.

So let's say I make a group.. and assign some users to the groups that I made.
How would I --
1) Allow different groups and different users to have full privileges over a file with .X extension
ex. I want user John to be able to read write execute files that end in .dat
ex. I want group Moderators to be able to read write execute files that end in .sh

2) Ban or block certain file names no matter the extension from said user.
ex. I want to ban Harry from any file that has the word MySQL in it



I'm almost certain this has something to do with chmod, but i'm not sure how I can edit permissions to a specific user/group to a file extension or file name.

I know each number in chmod corresponds to OWNER, GROUP, WORLD
But how would I specify what group or person?

I hope you understand what help I'm asking, and I appreciate all your help as always!


Thank you!


EDIT: Now that I think about it.. i would need to use a regular expression to specify what file name or extension, right?
 

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groups(1)						      General Commands Manual							 groups(1)

NAME
groups - Displays your group membership SYNOPSIS
groups [user] DESCRIPTION
The groups command writes to standard output the groups to which you or the specified user belong. The Tru64 UNIX operating system allows a user to belong to many different groups at the same time. Your primary group is specified in the /etc/passwd file. Once you are logged in, you can change your active group with the newgrp shell command (see sh). When you create a file, its group ID is that of your active group. Other groups that you belong to are specified in the /etc/group file. If you belong to more than one group, you can access files belonging to any of those groups without changing your primary group ID. These are called your concurrent groups. NOTES
The /etc/passwd and /etc/group files must be on the same node. EXAMPLES
To determine your group membership, enter: groups The groups to which you belong will be displayed. For example: devel prod FILES
Contains group information. Contains user information. SEE ALSO
Commands: csh(1), ksh(1), sh(1) Functions: initgroups(3), setgroups(2) groups(1)
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