Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION Uživatelský manuál stáhnout pdf (Strana 263)

16.12 Ownership and Permissions 251

Figure 16.19: Removing, then restoring permissions

u+x – allows the ﬁle owner to execute the ﬁle

a+rw – allows everyone to read and write to the ﬁle

ug+r – allows the owner and group to read the ﬁle

g=rx – lets the group only read and execute (not write)

By adding the -R option, we can change permissions for entire directory trees.

There’s a slight twist, however, because we can’t really “execute” a directory as we would an appli-

cation. Instead, when we add or remove execute permission for a directory, we’re really allowing (or

denying) permission to search through that directory.

To allow everyone read and write access to the tigger directoryinourlogindirectory,wejusttype:

chmod -R a+rw tigger

But. . . If we don’t allow others to have execute permission to tigger, it doesn’t matter who has read

or write access, because no one will be able to get into the directory – unless they know the exact

ﬁlename they want.

For example, let’stype:

1 2 ... 258 259 260 261 262 263 264 265 266 267 268 ... 299 300

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Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION Uživatelský manuál Strana 263