Linux File Permissions :
Understanding Linux File & Directory Permissions :
Understanding Linux File & Directory Permissions :
Linux File and directory Permission mechanism |
|||
|---|---|---|---|
| Read | Write | Execute | |
| Owner | 400 | 200 | 100 |
| Group | 40 | 20 | 10 |
| Others | 4 | 2 | 1 |
If you want to give Read, Write & Execute permission to Owner, Groups & Others, it means full permission.
400+200+100+40+20+10+4+2+1 = 777
If you do not want to give Write permission to Groups & Others, it means
400+200+100+40+10+4+1 = 755
The best thing of this calculation, you can not make sum of a number in two different ways .
It means 644 can be made in this way only that is 400+200+40+4
The meaning of 644 is Read & Write permission to Owner and Read permission to Group and Others only.
To give 777 to a directory :
where -R means Recursive, it means give this permission to all sub-directories and files.
To give 777 to a file :# chmod -R 777 /path/of/the/directory
where -R means Recursive, it means give this permission to all sub-directories and files.
# chmod 777 /path/of/the/fileNow you can create & give permissions by your own.
