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mc_rph
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Joined: 31 May 2003
Posts: 10

PostPosted: Fri May 21, 2004 6:12 pm    Post subject: ntop error Reply with quote

When I try to start ntop I get the following error:

bash-2.05b# ntop
Fri May 21 20:05:46 2004 ntop will be started as user nobody
Fri May 21 20:05:46 2004 ntop v.3.0 SourceForge .tgz MT (SSL)
Fri May 21 20:05:46 2004 Configured on May 21 2004 20:03:03, built on May 21 2004 20:03:34.
Fri May 21 20:05:46 2004 Copyright 1998-2004 by Luca Deri <deri@ntop.org>
Fri May 21 20:05:46 2004 Get the freshest ntop from http://www.ntop.org/
Fri May 21 20:05:46 2004 Initializing ntop
Fri May 21 20:05:46 2004 Checking eth0 for additional devices
Fri May 21 20:05:46 2004 Resetting traffic statistics for device eth0
Fri May 21 20:05:46 2004 DLT: Device 0 [eth0] is 1, mtu 1514, header 14
Fri May 21 20:05:46 2004 Initializing gdbm databases
Fri May 21 20:05:46 2004 Now running as requested user 'nobody' (65534:65534)
Fri May 21 20:05:46 2004 **FATAL_ERROR** ....open of /var/lib/ntop/prefsCache.db failed: File open error
Fri May 21 20:05:46 2004 1. Is another instance of ntop running?
Fri May 21 20:05:46 2004 2. Make sure that the use you specified can write in the target directory

Any clues?

TIA,
mc_rph
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golloza
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Joined: 14 Mar 2004
Posts: 427

PostPosted: Fri May 21, 2004 6:22 pm    Post subject: Reply with quote

Quote:
Fri May 21 20:05:46 2004 2. Make sure that the use you specified can write in the target directory


Did you make this sure?

ls -l /var/lib/ntop
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mc_rph
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Joined: 31 May 2003
Posts: 10

PostPosted: Fri May 21, 2004 7:12 pm    Post subject: yes I did Reply with quote

This just gives:

bash-2.05b# ls -l /var/lib/ntop
total 0

Don't know why "ls" should do anything but it for sure does not solve my problem....

Thanks anyway,
mc_rph
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golloza
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Joined: 14 Mar 2004
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PostPosted: Fri May 21, 2004 7:36 pm    Post subject: Reply with quote

I meant
ls -l /var/lib

This will show you if nobody has write access to /var/lib/ntop
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mc_rph
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Joined: 31 May 2003
Posts: 10

PostPosted: Sat May 22, 2004 9:38 am    Post subject: Reply with quote

golloza wrote:
I meant
ls -l /var/lib

This will show you if nobody has write access to /var/lib/ntop



That did it, I simply missed the part about "user nobody" and thought root can write - so what....

Thanks a million,
mc_rph
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chrisis
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Joined: 22 May 2003
Posts: 112
Location: Auckland

PostPosted: Mon May 24, 2004 11:42 am    Post subject: Reply with quote

What should ls -l /var/lib/ntop show?

I am getting this error when I try to start ntop:

Code:

Wait please: ntop is coming up...
24/May/2004 23:38:36 ntop v.2.2c MT (SSL) [i686-pc-linux-gnu] (05/24/04 11:22:26 PM build)
24/May/2004 23:38:36 Copyright 1998-2003 by Luca Deri <deri@ntop.org>
24/May/2004 23:38:36 Get the freshest ntop from http://www.ntop.org/
24/May/2004 23:38:36 Initializing ntop
24/May/2004 23:38:36 SSL is present but https is disabled: use -W <https port> for enabling it
24/May/2004 23:38:36 Initializing gdbm databases
24/May/2004 23:38:36 **FATAL_ERROR** ....open of /var/lib/ntop/prefsCache.db failed: Can't be writer

I don't have a file called /var/lib/ntop/prefsCache.db.  Even if I touch and have a zero sized file, I still get the error.

I have done chmod 0666 on that directory.  I also tried chown nobody:nobody (previously everything was owned by root).

I have even tried starting ntop using /etc/init.d/ntop start, but I just get the [!!].  I don't know how to troubleshoot that response!  (I have uncommented the options in /etc/conf.d/ntop).

Any ideas?
24/May/2004 23:38:36 **FATAL_ERROR** Possible solution: please use '-P <directory>'

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Marlo
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Joined: 26 Jul 2003
Posts: 1591

PostPosted: Wed Aug 18, 2004 12:06 pm    Post subject: Reply with quote

The solution:
Code:
chown -R nobody:nobody /var/lib/ntop/ /usr/share/ntop
and
Code:
ntop -A

close the thread
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