Hello, today I noticed heavy disk utilization. I did top to find this:- ********************************************************************** nobody 10204 10203 6 10:06 ? 00:00:05 /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype **********************************************************************
can somebody kindly throw some light on this _nobody_ and what is he doing on my m/c?
thanks a lot in advance :)
On Monday 24 Mar 2008, Pradnyesh Sawant wrote:
Hello, today I noticed heavy disk utilization. I did top to find this:-
- nobody 10204 10203 6 10:06 ? 00:00:05 /usr/bin/find /
-ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype
can somebody kindly throw some light on this _nobody_ and what is he doing on my m/c?
Looks like some system cron job for updating databases. Can't say more unless we know which distribution.
Regards,
-- Raju
On Mon, Mar 24, 2008 at 6:10 AM, Pradnyesh Sawant spradml@gmail.com wrote:
Hello, today I noticed heavy disk utilization. I did top to find this:-
nobody 10204 10203 6 10:06 ? 00:00:05 /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype
can somebody kindly throw some light on this _nobody_ and what is he doing on my m/c?
nobody it the user NFS uses for its functioning. It is a valid Linux user. Its GID is 65535 I think.
grep nobody /etc/passwd
Regards, NMK.
On Mon, 2008-03-24 at 08:12 +0400, Nadeem M. Khan wrote:
nobody it the user NFS uses for its functioning. It is a valid Linux user. Its GID is 65535 I think.
grep nobody /etc/passwd
It's a popularly used user-name, but it's not really correct to say that it's a "valid Linux user". Nor is there any established norm, AFAIK, to use 65535 as its numeric id.
Just correcting...
best wishes, jaju
On Mon, Mar 24, 2008 at 9:17 AM, Ravindra Jaju ravindra.jaju@gmail.com wrote:
On Mon, 2008-03-24 at 08:12 +0400, Nadeem M. Khan wrote:
nobody it the user NFS uses for its functioning. It is a valid Linux user. Its GID is 65535 I think.
grep nobody /etc/passwd
It's a popularly used user-name, but it's not really correct to say that it's a "valid Linux user". Nor is there any established norm, AFAIK, to use 65535 as its numeric id.
It has an entry in the passwd file. That makes it a valid linux user. 65535 or 65536 is its GID on RH based systems. Thats default. You can ofcourse change the name, the GID, or whatever.
Whats there to correct?
PS: This is a common interview question.
Regards, NMK.
On Mon, Mar 24, 2008 at 11:13 AM, Nadeem M. Khan nadeem.m.khan@gmail.com wrote:
It has an entry in the passwd file. That makes it a valid linux user. 65535 or 65536 is its GID on RH based systems. Thats default. You can ofcourse change the name, the GID, or whatever.
Oh, interesting. Can you point to some official reference for this? I would like to see which 'Linux standard' sets uid '65535 OR 65536' to that of nobody? Is this true of non-RH systems? Does Fedora also follow this standard, or is Fedora non-compliant with the standards? Ubuntu?
I have been out of touch with the Linux community for quite some time now, so might not be updated.
Whats there to correct?
I'm sorry.
PS: This is a common interview question.
That's amazing! Is the question related to the user "nobody" or knowing the user's uid? Or you mean to say "It's a common interview question for RHCE candidates"?
Thanks.
On Mon, Mar 24, 2008 at 11:52 AM, Ravindra Jaju ravindra.jaju@gmail.com wrote:
On Mon, Mar 24, 2008 at 11:13 AM, Nadeem M. Khan nadeem.m.khan@gmail.com wrote:
It has an entry in the passwd file. That makes it a valid linux user. 65535 or 65536 is its GID on RH based systems. Thats default. You can ofcourse change the name, the GID, or whatever.
Oh, interesting. Can you point to some official reference for this?
Please google for "valid linux user".
Users that have an entry in /etc/passwd are valid linux users, as opposed to users that login through directory services.
I would like to see which 'Linux standard' sets uid '65535 OR 65536'
Please do a grep nobody /etc/passwd on RH based distros.
to that of nobody? Is this true of non-RH systems? Does Fedora also follow this standard, or is Fedora non-compliant with the standards? Ubuntu?
I have not checked with non RH systems.
I have been out of touch with the Linux community for quite some time now, so might not be updated.
No wonder.
Whats there to correct?
I'm sorry.
Me too.
PS: This is a common interview question.
That's amazing! Is the question related to the user "nobody" or knowing the user's uid? Or you mean to say "It's a common interview question for RHCE candidates"?
The sequence of questions is something like this:
What user does nfs operate as on Red Hat 9? What is the UID of that user? Why is this user required?
Now, What exactly are you trying to prove? Is it any of these points:
1. A user having an entry in the passwd file is not a valid linux user. 2. User nobody is just a normal user who can login in to his home dir. 3. The UID of user nobody is not 65535 or 6 on RH based distros.
Regards, NMK.
On Mon, Mar 24, 2008 at 12:30:19PM +0400, Nadeem M. Khan wrote:
I have not checked with non RH systems.
It's 65534 on Debian Etch here.
On Sun, Mar 23, 2008 at 12:49 PM, Mehul Ved mehul.n.ved@gmail.com wrote:
On Mon, Mar 24, 2008 at 12:30:19PM +0400, Nadeem M. Khan wrote:
I have not checked with non RH systems.
It's 65534 on Debian Etch here.
Yeah. Thats the correct number for RH systems as well. Its not 65535 or 6. Its 65534.
Regards, NMK.
On 23-Mar-08, at 2:19 PM, Mehul Ved wrote:
I have not checked with non RH systems.
It's 65534 on Debian Etch here.
-2 on opendarwin
On Mon, Mar 24, 2008 at 12:30:19PM +0400, Nadeem M. Khan wrote:
On Mon, Mar 24, 2008 at 11:52 AM, Ravindra Jaju ravindra.jaju@gmail.com wrote:
On Mon, Mar 24, 2008 at 11:13 AM, Nadeem M. Khan nadeem.m.khan@gmail.com wrote:
It has an entry in the passwd file. That makes it a valid linux user. 65535 or 65536 is its GID on RH based systems. Thats default. You can ofcourse change the name, the GID, or whatever.
Oh, interesting. Can you point to some official reference for this?
Please google for "valid linux user".
Users that have an entry in /etc/passwd are valid linux users, as opposed to users that login through directory services.
Errr, no. Any user whose informaion can be accessed via getpwent(3) are valid Linux users. This is regardless of whether the information is in LDAP, NIS, NIS+, Radius, a RDBMS, /etc/passwd, or any other sort of store.
I would like to see which 'Linux standard' sets uid '65535 OR 65536'
It isn't a Linux standard, it's a Sunos-ism.
Of course, [devdas@devdas-b ~]$ getent passwd nobody nobody:x:99:99:Nobody:/:/sbin/nologin [devdas@devdas-b ~]$ cat /etc/redhat-release CentOS release 4.6 (Final)
SunOS tradition was 65535.
Devdas Bhagat
On Mon, Mar 24, 2008 at 7:40 AM, Pradnyesh Sawant spradml@gmail.com wrote:
Hello, today I noticed heavy disk utilization. I did top to find this:-
nobody 10204 10203 6 10:06 ? 00:00:05 /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype
You might want to check the cron(s) for a scheduled process and also tell the list about the distribution you are using. Additionally, if you have a tool like Beagle turned on and using NFS mounted shares, that information would be of help too.
On Mon, Mar 24, 2008 at 7:40 AM, Pradnyesh Sawant spradml@gmail.com wrote:
Hello, today I noticed heavy disk utilization. I did top to find this:-
nobody 10204 10203 6 10:06 ? 00:00:05 /usr/bin/find / -ignore_readdir_race ( -fstype NFS -o -fstype nfs -o -fstype nfs4 -o -fstype
can somebody kindly throw some light on this _nobody_ and what is he doing on my m/c?
Seems you are using Debian.. Check /etc/cron.daily/find
-
Abhishek Ambe rkar [अभिषेक ] -
Devdas Bhagat -
Kenneth Gonsalves -
Mehul Ved -
Nadeem M. Khan -
Pradnyesh Sawant -
Raj Mathur -
Ravindra Jaju -
Sankarshan Mukhopadhyay