File permsissions for some backup files saved onto cd

r3dhatter · 08-06-2004, 12:25 PM

Hi, I saved some work I had done onto a cdrom. Although I cannot write over it because the file permissions are -r--r--r-- instead of drwxr-xr-x. How do I change the files with -r--r--r-- to drwxr-xr-x?

Note: I got the -r--r--r-- files from a cd that I used to back those up.

Thanks

Tamsco · 08-06-2004, 12:32 PM

In terminal you need to use the chmod command running as either root or the owner of the files

The permissions go like the is. read is 4 , write is 2 and execute is 1 . If you want read and write, added 4 +2 =6

so you would use chmod 751 (file)

The d means directory. If your directories aren't recognized as such I don't know how to help you.

J.W. · 08-06-2004, 12:57 PM

If the files exist on a CD-ROM, you aren't going to be able to change them because the CD is write-once. My recommendation would be to copy the files to a temporary directory on your hard drive, chmod the permissions, then reburn them to a new CD. -- J.W.

r3dhatter · 08-06-2004, 01:00 PM

Thanks! That worked, but..do I really have to do one file at a time? It isn't a big deal, but sort of a hassle to have to do that to every file. And I don't think I could do it to a directory because the directory gives me all the permissions I need (drwxr-xr-x)...

r3dhatter · 08-06-2004, 01:26 PM

I think I could just cd to the directory, then do dir. Copy the files and chmod 751 paste the files. But are there any other ways ? Or is that the best?

Thanks.

Tamsco · 08-06-2004, 06:02 PM

Familiarize yourself with the *. It means everything

suppose I have five files in /whatever

foo
foo1
foo2
greg
gre1

rm * means remove everything
rm f* means remove everything starting with f (foo foo1 foo2)
rm *1 means remove everything ending with 1.

It is very helpful.

You would have wanted to go to the temporary directory on your hardrive and type chmod 751 *