Syntax question

satimis · 09-20-2004, 10:54 AM

Hi folks,

What will be the correct syntax to change the ownership and group of dir-A including all its directories and all files.

Example:
owner=AAA
group=BBB

# chown -c AAA BBB /path/to/dir-A

Please advise. TIA

B.R.
satimis

Demonbane · 09-20-2004, 11:00 AM

use the "-R" option

ppuru · 09-20-2004, 11:01 AM

SAtmis

chown -R AAA:BBB /path/to/A

satimis · 09-20-2004, 07:16 PM

Hi ppuru and Demonbane,

Tks for your advice.

Is there any command OR combination of commands which can easily discover the subdirectories and files under dir-A belonging to 'root' and another group, say CCC, instead of checking each directory and file.

Furthermore if a directory/file belonging to 'root' and in the group of user, say xxx, can xxx open it?

TIA

B.R.
satimis

Tinkster · 09-20-2004, 07:24 PM

No, there is no "centralised permission database" ...

You could use
find
with the -gid and/or -uid expressions to search.

Cheers,
Tink

satimis · 09-22-2004, 11:17 AM

Hi Tinkster,

Tks for your advice.

Quote:

No, there is no "centralised permission database" ...

You could use
find
with the -gid and/or -uid expressions to search.

Can I use following combination of commands to search them.

find -gid -uid | grep "root:CCC"

B.R.
satimis

Tinkster · 09-22-2004, 12:43 PM

I was thinking more along the lines
of

find -uid 0 -gid 500

But

find -user CCC -group root
will work as well ...

Cheers,
Tink

satimis · 09-22-2004, 09:01 PM

Hi Tinkster,

Tks for your advice.

Quote:

find -uid 0 -gid 500

What do '0' and '500' represent?

Quote:

find -user CCC -group root
will work as well ...

Yes. But paths must precede expression

# find /path/to/directory/ -user CCC -group root

NOT

# find -user CCC -group root /path/to/directory/

Tks.

B.R.
satimis

Tinkster · 09-22-2004, 09:16 PM

I never mentioned a path, did I? :}

If you omit it it will start searching in the
current directory

Thanks for trying to educate me, anyway.

Cheers,
Tink

chrism01 · 09-23-2004, 07:47 AM

All user and group ids/ownerships are actually done by number, see /etc/passwd, /etc/groups.
The names are just there for ease of reading... analogous to using DNS on the net, it's all done by numeric ip addresses in the background, it just looks like the net knows what www.google.com means.