Quick Start Guide
FolderFileAccess Permission
tents of this directory
with ls -l, for example.
However, if they only
have execute permission
for the directory, they
can nevertheless access
certain les in this direc-
tory if they know of their
existence.
Users can create, rename
or delete les in the direc-
tory.
Users can change the
le: They can add or drop
data and can even delete
Write (w)
the contents of the le.
However, this does not
include the permission to
remove the le complete-
ly from the directory as
long as they do not have
write permissions for the
directory where the le is
located.
Users can change into
the directory and execute
Users can execute the
le. This permission is
Execute (x)
les there. If they do notonly relevant for les like
have read access to thatprograms or shell scripts,
directory they cannot listnot for text les. If the
the les but can accessoperating system can ex-
them nevertheless if they
know of their existence.
ecute the le directly,
users do not need read
permission to execute
the le. However, if the
le must me interpreted
like a shell script or a perl
program, additional read
permission is needed.
Note that access to a certain le is always dependent on the correct combination of
access permissions for the le itself and the directory it is located in.
17.5.3 Modifying File Permissions
In Linux, objects such as les or folder or processes generally belong to the user who
created or initiated them. The group which is associated with a le or a folder depends
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