Change permissions of directory

Question

I have a directory with drwxrwxr-x+ permissions. I want to change this permission to drwxr-xr-x

Please suggest the command to change the above permissions.

Answer 1

Let's analyze the desired result:

drwxr-xr-x

d just means this is a directory, we can ignore it:

rwxr-xr-x

translate it to binary code:

11110101 (0 is equivalent to -).

Translate each 3 digits to a decimal number:

755: 111 → 7, 101 → 5

Eventually just type this:

chmod 755 <dirname>