File Management

File Management

When using UNIX operation system that supports 5,000 users and the company needs to allow 4,990 users permission to access one file, a number of operations need to be performed. To implement the protection scheme to files, it is important to understand the hierarchy of the file management system within the UNIX operating system.

UNIX operating systems are designed on a file access control scheme. Each user is given a user ID and password to log into the system. The user is then given an access name by the systems administrator into group name. Each given group name is either allowed or denied access to each file name.

Each group ID has assigned privileges according to the groups they are placed under by administration. For example, Master01 has permission to read, write, and execute files, which is the administrative team, whereas, Tech02 group may only be able to read and write to the file and Tech03 can only read the file. Once this is done, you have acknowledged which groups have special privileges.

The administration team has now set the group names and assigned each user’s name to a group, and out of 5,000 users, 4,990 will be granted group permissions. For example: a training file created by one user in Tech02 and the user ID want to place a lot of training PowerPoint presentations into one file for 4,990 users to read the training documents. The creator can give the 4,990 users in a group ID access to read the files only by setting the permissions for the file to Tech03 group name.

Once a file is create the user ID can assign the group ID. File ownership is a component of UNIX to provide security to the storing files. The owner’s permission determines the actions the owner of the file can perform. The group’s permissions determine the actions of the members in the group the files belong too can perform. The world permissions or other user indicates the actions all other users on the system can perform on the file.

FreeBSD allows...