Define file permission in unix, Operating System

Assignment Help:

The permission function is used to calculate what, if any access each class or level of user has to each file on a Unix machine. The permission task is one of the data components stored in the inode table entry for the folder.

Every file has permission or protection attributes for 3 levels or classifications of machine user, i.e.

  • User (u)
  • Group (g)
  • Other (o)

These permissions are loaded using the ls -l command. The permission mask is spited into three areas, also named levels of permission. The left most group of three functions are those permissions that apply to the operator, or individual who contains the file.
In that case, ownership is calculated by the user identification number given when the file is build. Don't lay about the user identification number at that point, we'll see closely at it when we see at how your user record is prepared and stored.

 

2250_File permission in unix.png


Related Discussions:- Define file permission in unix

Explain multitasking operating system, Multitasking - An Operating systems...

Multitasking - An Operating systems that is proficient of allowing multiple software processes to be run at the same time. Below are some instances of multitasking Operating Syste

Explain inverted page table, Inverted page table In page table the page...

Inverted page table In page table the page table has one entry for every page that the process is using. The operating system must translate this reference into a physical memo

Explain partitions and mounting, Partitions and mounting A disk can be ...

Partitions and mounting A disk can be sliced into many partitions, or a partition can span multiple disks. Every partition can be either "raw", having no file system, or "cooke

Explain quick fit algorithams, QUICK FIT ALGORITHAMS Here we keep apart...

QUICK FIT ALGORITHAMS Here we keep apart lists for holes and processes. Therefore this reduces the searching time for holes Hole list and Process list. If we organize the li

Is the internet a lan or else a wan, Q. Is the Internet a LAN or else a WAN...

Q. Is the Internet a LAN or else a WAN? Answer: The Internet is a WAN as the a variety of computers are located at geographically different places and are connected by long-dis

CPU Scheduing FCFS, Assume that P A , P B and P C are three distinguished p...

Assume that P A , P B and P C are three distinguished program s . When P A is executed, it needs 10 ticks to complete its execution and it forks new processes executing P B at tick

Mutual exclusion variable, Since each thread has its own processing space t...

Since each thread has its own processing space therefore communication between threads will need to be done through a common global variable. Since multiple threads can access the

Define most common phase structured grammar, Which is most common phase str...

Which is most common phase structured grammar? Most common phase structured grammar is Context – Sensitive

Explain resource allocation graph, RESOURCE ALLOCATION GRAPH When a pro...

RESOURCE ALLOCATION GRAPH When a process Pi wishes an instance of resource type Rj, a request edge is inserted in the resource allocation graph. When this request is able to be

Mechanism by which one segment belong to two address spaces, Q. Explain a m...

Q. Explain a mechanism by which one segment could belong to the address space of two different processes. Answer: Because segment tables are a collection of base-limit register

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd