- #1
Pithikos
- 55
- 1
I was wondering how they did come up with the way of setting permissions using the linux program chmod by just using numbers. For example:
Any sum of those give a unique permission to a file:
2+4=6 Let's you write and read it.
1+4=5 Let's you execute and read it.
So is there an algorithm behind this? Say for example that I have 5 different items and I want to be able to pass a single number and the other person to understand which combination of items I made.
Code:
1 is for execute
2 is for write
4 is for read
Any sum of those give a unique permission to a file:
2+4=6 Let's you write and read it.
1+4=5 Let's you execute and read it.
So is there an algorithm behind this? Say for example that I have 5 different items and I want to be able to pass a single number and the other person to understand which combination of items I made.