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Tips & Tricks 

NTFS File and Folder Permissions Explanation

Understanding NTFS File and Folder permissions levels, and what tasks each level of permissions allows you to perform is essential to maintaining the security of NPC's Shared Drives.

It is important to differentiate between the "Permission Level" and the "Actions Allowed" by each permission level so Pers-543 has created a handy table that lists the most common Permission Levels, and illustrates what actions each permission level allows you to perform. Why?

When confusion about permissions levels occurs, ISCs have, on occasion, granted "Full Control" level permissions improperly. This causes problems later on when users, concerned about privacy of data, remove all other Security Groups from the folder.

When this occurs NMCI personnel are prevented from backing up the data on the shared drive. This can lead to catastrophic loss of data because NMCI was prevented from backing up important data. In some instances, the user has also locked themself and the rest of their Pers Code out of the folder and no one could access the data.

In order to prevent these types of situations from occurring, ISCs should refer to the table below when determining what Permission Level you assign to Security Groups that have access to your Shared Drives. The chart below illustrates the the basic NTFS File and Folder Permissions levels, and then shows the actions that a particular level of permissions allows your users to perform.

Permission Level --> Full Control Modify Read & Execute List Folder Contents Read Write 

Actions you may perform are listed below and are based on the permissions level above that you applied

Traverse Folder/Execute File

X

X

X

X

 

 

 List Folder/Read Data

X

X

X

X

X

 

 Read Attributes

X

X

X

X

X

 

 Read Extended Attributes

X

X

X

X

X

 

 Create Files/Write Data

X

X

 

 

X

 Create Folders/Append Data

X

X

 

 

X

 Write Attributes

X

X

 

 

X

 Write Extended Attributes

X

X

 

 

X

 Delete Subfolders and Files

X

X

 

 

 

 Delete

X

X

 

 

 

 Read Permissions

X

X

X

X

X

X

 Change Permissions

X

 

 

 

 

 Take Ownership

X

 

 

 

 

 Synchronize

X

X

X

X

X

X

In summary, the permission level, "Modify" is the highest level of permission an ISC should ever assign to any Security Group.

This allows your users in that security group to Create, Edit, or Delete any file or folder on your area of the shared drive. 

The "Full Control" level of permissions is reserved for Echelon III and Echelon II File Share Administrators.

Additionally, ISC's should download and review the linked Shared Drive Schema .pdf file to see an example arrangement of how shared drive folders should be arranged. this will help ISCs better manage their folder structure.

Example_Structure.pdf

 

Tips for MS Excel 2007

Concatenate Cells

To Concatenate the values in two or more cells, you can use the concatenate function and the “&” symbol.

Example:

Cell A2 contains the Last Name, “Thomas”
Cell B2 contains the First Name, “Gregory”

To concatenate those two cells, navigate to cell C2 and enter the following command:

=B2 & A2 <Press Enter>

C2 will now display, "GregoryThomas"

Well, that's not what we wanted, is it? We wanted, "Gregory Thomas", so how do we get the space between the first and last names?

We add it in the concatenate command, using the example below:

=B2 & " " & A2 <Press Enter>

That leaves us with "Gregory Thomas"

Future Tips Will consist of the functions below, as well as suggestions we receive from users.

LTRIM Function to remove portion of the cell value

RTRIM Function to remove a portion of the cell value

LEN Function - Using LEN to determine how many characters are in a cell

Sort a Pivot Table based on the Totals column

 

Resize Picture for Submission to Want Ad

To re-size a picture to comply with the 250KB size limit, follow the steps in the following document

Resizing a Picture for Submission to Want Ads.pdf

 

NAVY PERSONNEL COMMAND: 5720 Integrity Drive, Millington TN 38055-0000 
Comments? Suggestions? Call 866-U-ASK-NPC or Email the Webmaster | Updated:2/9/2012 9:04 AM 


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