There is a shorthand way of setting permissions by using octal numbers. Read permission is given the value 4, write permission the value 2 and execute permission 1.
r w x 4 2 1
These values are added together for any one user category:
1 = execute only 2 = write only 3 = write and execute (1+2) 4 = read only 5 = read and execute (4+1) 6 = read and write (4+2) 7 = read and write and execute (4+2+1)
So access permissions can be expressed as three digits. For example:
user group others chmod 640 file1 rw- r-- --- chmod 754 file1 rwx r-x r-- chmod 664 file1 rw- rw- r--
Закладки на сайте Проследить за страницей |
Created 1996-2024 by Maxim Chirkov Добавить, Поддержать, Вебмастеру |