Red Hat ENTERPRISE LINUX WS 2.1 - Guida di Installazione Scaricare il pdf (Pagina 229)

File and directory handling 229

DONE

INDEX

The permissions of the directory dira are 754:

• everybody can read (= see) the directory dira, e.g. use ls on dira

• only the owner jim and members of the group sys can read and search e.g.

use cd, pwd, ls, cat, more, du, file on or in dira

• only the owner jim can also write or remove files in dira, e.g. use rm, cp,

mv, touch on files in dira

• In the following example the directories dira, dirb and dirc are assumed to be

readable and searchable.

• creating files

If the user guest wants to create the file fila, e.g. :

touch /dira/dirb/dirc/fila

the directory dirc must be writable for guest, the parent directories dirb and

dira do not

have to be writable for guest

• removing files

If the user guest wants to remove the file fila, e.g. :

rm /dira/dirb/dirc/fila

the directory dirc must be writeable for guest, the parent directories dirb and

dira do not

have to be writable for guest. The file fila can have any permis-

sions, even 000, and any owner or group, you can always remove it if its di-

rectory is writable !

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Red Hat ENTERPRISE LINUX WS 2.1 - Guida di Installazione Pagina 229