Red Hat ENTERPRISE LINUX WS 2.1 - Guia de Instalação descarregar pdf (Página 228)

228 File and directory handling

DONE

INDEX

14.1.2 Permissions of a directory

The permissions of a directory are represented as follows:

1 = x = search

2 = w= write

4 = r = read

14.1.3 Types of Access

Each file has 3 sets of permissions for 3 categories of users:

• the actual owner (shortened ’u’ like user)

• users who have the same group ID as the owner

(shortened ’g’ like group)

• users who have a different group ID than the owner (shortened ’o’ like other)

14.1.4 Example

•Type ls -l filename to see the 3 sets of file permission

e.g. ls -l fila

-rwxrw-r-- 1 jim sys 987 Sep 15 15:08 fila

The permissions of the file fila are 764:

7 = rwx for the user jim

6 = rw- for all users of the group sys

4 = r- - for other users

• Use the command ls -ld to see the directory permissions.

e.g. ls -dl dira

drwxr-xr-- 1 jim sys 987 Sep 15 15:08 dira

1. the group attribute of a file can be changed with chgrp, the permissions of a file always

refer to the group ID which is shown with ls -l filename

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Red Hat ENTERPRISE LINUX WS 2.1 - Guia de Instalação Página 228