Question

000 permission on unix

Asked by: shaunak

I am a root user on unix system
Unknowingly and automatically the folder admin in /home/user1/www got permissions 000. Because of this I am not able to access the folder nor I am able to change the permissions of that folder.
I tried chmod 000 admin from /home/user1/www/ but its not working and says
chmod: changing permissions of `admin': Operation not permitted

How to change the permissions of this folder

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Asked On
2009-10-18 at 08:34:25ID24821727
Tags

unix file permissions

Topics

Apache Web Server

,

Unix Operating Systems

,

Unix Setup

Participating Experts
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Comments
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Answers

 

by: KeremEPosted on 2009-10-18 at 08:41:45ID: 25600202

hi,

In unix systems there's no limit to a root user and how he prefers to change file permissions. So there must be another reason why you can nn ot change a permission.

 

by: fiboPosted on 2009-10-18 at 08:41:53ID: 25600204

B-)
Just to be sure, please see no offence... are you now typing chmod 000 or something like chmod 700?

 

by: leakim971Posted on 2009-10-18 at 08:44:26ID: 25600215

Hello shaunak,

Use chown before.

Regards.

 

by: shaunakPosted on 2009-10-18 at 08:48:52ID: 25600234

I tried
#chmod 775 admin
chmod: changing permissions of `admin': Operation not permitted
I tried
#chown -R -c root:root admin
chown: changing ownership of `admin': Operation not permitted

Any clues?

 

by: KeremEPosted on 2009-10-18 at 08:50:33ID: 25600238

will you post the
pwd

and

ls -al

output here ?

 

by: shaunakPosted on 2009-10-18 at 08:54:38ID: 25600259

Please see the pwd and ls output

pwd 
/home/user1/www/subscription/ml
 
ls -al
drwxr-xr-x   8 user1 user1  4096 Oct 18 20:02 ./
drwxr-xr-x   4 user1 user1  4096 Oct 18 15:31 ../
d---------  15 user1 user1  4096 Oct 18 00:40 admin/
-rw-r--r--   1 user1 user1   238 Oct 18 00:40 bak.htaccess
drwxr-xr-x   2 user1 user1  4096 Oct 18 00:40 config/
-rw-r--r--   1 user1 user1  2283 Oct 18 00:40 dl.php
drwxr-xr-x   3 user1 user1  4096 Oct 18 00:40 images/
-rw-r--r--   1 user1 user1   698 Oct 18 00:40 index.bal
-rw-r--r--   1 user1 user1 35174 Oct 18 00:40 index.php
drwxr-xr-x   2 user1 user1  4096 Oct 18 00:40 js/
-rw-r--r--   1 user1 user1  3873 Oct 18 00:40 lt.php
                                              
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by: KeremEPosted on 2009-10-18 at 09:00:19ID: 25600274

ok will you please posst the output of

id

please ?

 

by: shaunakPosted on 2009-10-18 at 10:25:17ID: 25600571

uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)


 

by: askbPosted on 2009-10-18 at 10:35:25ID: 25600614

chmod a+r user1:user1 /home/user1/www -R

 

by: fiboPosted on 2009-10-18 at 10:41:03ID: 25600634

according to the pwd it seems that it should be
/home/user1/www/subscription/ml/admin

 

by: tfewsterPosted on 2009-10-18 at 12:49:24ID: 25601124

Is this an NFS-mounted or read-only filesystem?

 

by: shaunakPosted on 2009-10-18 at 12:53:55ID: 25601142

Thanks all for your help. I got it solved.

An attribute (immutable) was set for the folder /home/user1/www/subscription/ml/admin

So I removed that attribute by using the command "chattr -i admin" and changed the permission to 755.
Thanks a lot.

 

by: KeremEPosted on 2009-10-18 at 13:51:40ID: 25601361

Though you can close the question let me tell you that it is impossible to hinder root user from changing any attribute of the system. This is not possible in any unix system. You'd rather find waht ahs happened or if you can recreate the same condition.

 

by: KeremEPosted on 2009-10-18 at 13:52:38ID: 25601366

Opps chattr +i has casued the same condition.. You must be right : )

 

by: TintinPosted on 2009-10-18 at 14:46:27ID: 25601570

chattr certainly does prevent root from having full overriding permissions.

I got caught out by that one a few years back.

 

by: KeremEPosted on 2009-10-18 at 15:39:16ID: 25601736

yup this is my first :)

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