5. Questions and Answers
What do the numbers mean?
They are the single-digit (octal) representations
of the permissions. Add 4 if read permission is set, 2 if write is set
and 1 if execute is set. So, read/write/no-execute is 6 and read-only is
4.
When you open a symbolic link, which file gets changed
-- the link or the original?
If a link is selected with the "Open" command, the
link's permissions are changed, not the original's. However, if a link
is given in the command-line, it is resolved to the original file.
For
more information, read the man pages for chmod, chown, chgrp and ls.
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