Explain the read, write, and execute permissions on a UNIX directory.

Explain the read, write, and execute permissions on a UNIX
directory.

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Explain the read, write, and execute permissions on a UNIX directory...

Directory permissions are different than they are on files.
On files they're pretty much like you'd expect them: read
the file, write/delete the file, and execute the file. But
for directories it's a bit less intuitive.

· Read means you can get a directory listing.
· Write says you can create or delete contents within
the directory.
· Execute means you are able to enter the directory,
i.e. cd into it.

· Sticky Bits Permission
The sticky bit had a funky purpose originally, but it's now
used to keep people from modifying or deleting the contents
of directories that the user or group owns. You can apply
it to files as well, but it's usually employed on
directories.

Changing Permissions
To change permissions you use the chmod command and simply
lay out what you want the permissions to look like on the
file directory.
Change the permissions on your web directory to 755.
# chmod 755 web_directory
Change the permissions on your grocery list to 644.
# chmod 644 grocery_list.txt

Please let me know if you have any questions.

Thanks,
Amit Shiknis

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