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File/Folder Permissions And Groups
Every file and directory on a server has a set
of access permissions associated with it. These include the owner of a file, the
group a file is associated with, and who has read, write, and execute permission
on that file. These permissions allow you to choose who can use your files, and
control what they can do with them. There are three
groups in terms of file access, and three different permission types they can
receive.
The groups are:
- Owner - the Owner group consists only of the
owner of the website
- Group - The group permission pertains to
users who are listed in the group to which the file is assigned
- Everyone - the Other group consists of everyone else like website visitors
The potential permissions are:
- Read - this allows a user or program the ability to read the
data in a file
- Write - the Write permission allows a user or program the ability to write new
data into a file, and to remove data from it
- Execute - the Execute permission allows a user or program the ability to
execute a file, if it is a program or a script
Setting Permissions Numerically
| Numeric
Value |
Permission |
| 0 |
No Permission |
| 1 |
Execute |
| 2 |
Write |
| 3 |
Write + Execute |
| 4 |
Read |
| 5 |
Read + Execute |
| 6 |
Read + Write |
| 7 |
Read + Write + Execute |
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