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Full Discussion: Access permissions chmod 606
Top Forums UNIX for Dummies Questions & Answers Access permissions chmod 606 Post 302849771 by alister on Tuesday 3rd of September 2013 08:45:46 AM
Old 09-03-2013
Quote:
Originally Posted by Simza
Let's not debate whether 606 makes sense or not.
It makes no sense because your entire problem statement centers around granting some permissions to some unnamed group but the permission 606 grants nothing to any group. Whatever permissions the members of that group have on a 606 directory or file, they have them because they are granted to everyone.

You should provide some specifics. Show us a long listing of the file hierarchy, with owner/group/perms, and examples of the commands that group members and non-members should be allowed to use and forbidden from using.

Quote:
Originally Posted by Simza
... users belonging to the same group access to a dir where they can write files ...
Does that mean creating a new file in the directory, or modifying an existing file, or both?

Quote:
Originally Posted by Simza
users outside the group should be able to read and write to the dir.
Reading a "dir" is essentially getting a file list, such as what ls does. Writing to a "dir" means creating/deleting/renaming files. Is this what you actually intended to say? Or do you actually mean reading and writing to files within the directory?

Sounds to me like members of the group are intended to have less permissions than those not in the group.

Regards,
Alister
Last edited by alister; 09-03-2013 at 09:58 AM..
 

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LEARN ABOUT X11R4

gshadow

GSHADOW(5)                                                 File Formats and Conversions                                                 GSHADOW(5)

NAME

       gshadow - shadowed group file

DESCRIPTION

       /etc/gshadow contains the shadowed information for group accounts.

       This file must not be readable by regular users if password security is to be maintained.

       Each line of this file contains the following colon-separated fields:

       group name
           It must be a valid group name, which exist on the system.

       encrypted password
           Refer to crypt(3) for details on how this string is interpreted.

           If the password field contains some string that is not a valid result of crypt(3), for instance ! or *, users will not be able to use a
           unix password to access the group (but group members do not need the password).

           The password is used when a user who is not a member of the group wants to gain the permissions of this group (see newgrp(1)).

           This field may be empty, in which case only the group members can gain the group permissions.

           A password field which starts with an exclamation mark means that the password is locked. The remaining characters on the line
           represent the password field before the password was locked.

           This password supersedes any password specified in /etc/group.

       administrators
           It must be a comma-separated list of user names.

           Administrators can change the password or the members of the group.

           Administrators also have the same permissions as the members (see below).

       members
           It must be a comma-separated list of user names.

           Members can access the group without being prompted for a password.

           You should use the same list of users as in /etc/group.

FILES

       /etc/group
           Group account information.

       /etc/gshadow
           Secure group account information.

SEE ALSO

       gpasswd(5), group(5), grpck(8), grpconv(8), newgrp(1).

shadow-utils 4.5                                                    01/25/2018                                                          GSHADOW(5)
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