newbie's question on file permission
Zhengguo Xu
tworiversfolk at gmail.com
Fri Aug 1 18:37:41 UTC 2008
Greeting all!
Recently I encounted a strange problem (or it maybe very obvious for you
guys) while copying files and I'd like to ask a question on file permission
in linux.
I have a file, lets say 'biology.ppt' and it has permission as follows and i
am the owner and it belongs to group 'root'
-rwx------
i want to change it to group, say, 'test', and give permissions to everyone
to read and write and execute, what's wrong when I run the following
command?
sudo chgrp test biology.ppt
sudo chmod 777 biology.ppt
nothing happened when i run these commands and i tried them with and without
sudo. the file still has the permission -rwx------ and root is still the
group.
if it matters, the file is on a usb disk mounted in /media
i also tried to create some file in my home directory and i can change it as
i want with the same command.
any help would be greatly appreciated.
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