(coreutils.info)Changing file attributes

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Enter node , (file) or (file)node

13 Changing file attributes
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A file is not merely its contents, a name, and a file type (Note:
Special file types).  A file also has an owner (a user ID), a group (a
group ID), permissions (what the owner can do with the file, what people
in the group can do, and what everyone else can do), various timestamps,
and other information.  Collectively, we call these a file’s
“attributes”.

   These commands change file attributes.

chown invocation

Change file owners and groups.

chgrp invocation

Change file groups.

chmod invocation

Change access permissions.

touch invocation

Change file timestamps.