[CentOS] process identification

Fri Sep 19 14:15:27 UTC 2014
Richard Ray <kqt4at5v at gmail.com>

On Fri, 19 Sep 2014, Ulf Volmer wrote:

> On 09/19/2014 03:58 PM, kqt4at5v at gmail.com wrote:
>> On Fri, 19 Sep 2014, Reindl Harald wrote:
>>> Am 19.09.2014 um 15:45 schrieb kqt4at5v at gmail.com:
>>>> I am running CentOS 6.5. I know this is not a CentOS specific problem.
>>>> Netstat shows several open ports and no pid.
>>>>
>>>> tcp    0  0 *:48720                 *:*                 LISTEN      -
>>>> tcp    0  0 *:43422
>>>> *:*                 LISTEN      -
>>>> udp    0  0 *:50216                 *:*
>>>
>>> alias netstat='/bin/netstat --numeric-hosts --numeric-ports --notrim
>>> --programs -u -t'
>>>        /bin/netstat
>
>> This netstat show exactly the same. Lsof does not show these ports.
>
> This looks like these port are opened by kernel, not by a process, for
> example like nfs.
>

How can I know for sure?