CHMOD

For Dummies:

How to do it technically?
Let's say I go to your site through FileZilla (it's an FTP client), I select any file or folder to the site and I click the right mouse button, Pops out a choice, where and there is a CHMOD configuration option. Sufficiently intuitive (see below on the right).

How to set permissions - CHMOD

Only for Unix server.

 User rights 

read    write    execute

 Group rights 

read    write    execute

 Rights for all 

read    write    execute

The most common figures are 777 or 666.
In general, they can take values from 0 to 7.
The calculation is based on the binary system of calculation.
If you write down the numbers, you get:

As you know, the unit corresponds to the statement (yes),
Zero - ignoring (no).
Now let's define what they claim and ignore these combinations of numbers.
The following order is applied: R W X

R - read W - write X - execute

R W X 7 x x x 6 x x   5 x   x 4 x     3   x x 2   x   1     x 0

But the numbers are given in the form 777, not 7.

The first digit document master Second persons belonging to a group Third any user

Hence, 754 gives the right:

• The owner will do with him whatever he wants;
• Group members read and execute;
• The guest is only read.

The system administrator of the server can change access rights.