Permission numbers, such as 755, represent file permissions in a numeric format, where each digit corresponds to a specific set of permissions for the owner, group, and others. Each digit is the sum of the following values:
- Read (r): 4
- Write (w): 2
- Execute (x): 1
Here's how to interpret the number 755:
-
7 (Owner):
- 4 (read) + 2 (write) + 1 (execute) = 7
- The owner has read, write, and execute permissions.
-
5 (Group):
- 4 (read) + 0 (no write) + 1 (execute) = 5
- The group has read and execute permissions, but not write.
-
5 (Others):
- 4 (read) + 0 (no write) + 1 (execute) = 5
- Others also have read and execute permissions, but not write.
In summary, 755 means:
- The owner can read, write, and execute.
- The group can read and execute.
- Others can read and execute.
If you have any further questions or need clarification, feel free to ask!
