[Dnsmasq-discuss] deleting entries from dhcp-hostsfile in dnsmasq

[Simon Kelley]

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On 10/04/15 16:00, jsb wrote:
> Thanks! I tried dhcp_release. It deletes the dhcp lease from 
> /var/lib/misc/dnsmasq.leases file. However, the mac address entry 
> does not get deleted from dhcp-hostsfile. I want to make sure that 
> particular  machine gets unregistered from my dnsmasq server. In 
> order to delete this particular mac address from dhcp-hostsfile, 
> should this file be parsed? Thanks,Jay
> 
> 

The dhcp-hostfile is just an input to dnsmasq, it doesn't control the
contents of that file at all. I guess you need to find whatever is
generating that file on your system, and alter that. Note that once
the mac address has gone from  the dhcp-hostsfile, you need to send
dnsmasq SIGHUP to make it re-read the new state of the file.


Cheers


Simon.

> 
> On 09/04/15 21:34, jsb wrote:
>> Hello,I am using dhcp-hostsfile=/home/clients file to dynamically
>>  add a new system/host (mac address). Is there a way to delete a
>>  system/host mac address from this file using a command? or
>> should this file be parsed and deleted for a mac
>> address?Thanks,Jay
> 
> 
> There's a small command-line utility called dhcp_release which is
> in the directory contrib/wrt in the dnsmasq source distribution.
> It's included in Debian/Ubuntu packages, I'm not sure about other 
> distros.
> 
> That will allow you to delete an arbitrary DHCP lease.
> 
> 
> Cheers,
> 
> Simon.
> 
> 
> 
> 
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