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waltinator
Asked: 2018-11-17 07:23:34 +0800 CST

Ubuntu 16.04 Network Manager DHCP and PXE setup. Can't find `dnsmasq.conf`

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I'm about to upgrade my (seperate computer) firewall (Going from IPCop to IPFire). I'd like to use PXE to boot the upgrade on the firewall.

I depend on the firewall system for DHCP, so when it's down for reinstallation, nobody will get an IP address.

I think I know the magic to add to dnsmasq.conf to cause it to serve DHCP, but, I don't see /etc/dnsmasq.conf. Using locate says: 

$ locate dnsmasq.conf
/etc/dbus-1/system.d/dnsmasq.conf
/snap/core/5548/etc/dbus-1/system.d/dnsmasq.conf
/snap/core/5662/etc/dbus-1/system.d/dnsmasq.conf
/snap/core/5742/etc/dbus-1/system.d/dnsmasq.conf
/usr/share/doc/dnsmasq-base/examples/dnsmasq.conf.example

This is probably due to my use of Network Manager.

I plan to use dhcpd-hpa to serve the PXE stuff. Are there landmines?

networking pxe dhcp

1 Answers

  1. Best Answer

    @JackyChan After the cp /usr/share/doc/dnsmasq-base/examples/dnsmasq.conf.example /etc/dnsmasq.conf, I did 

    inotifywatch -t 180 -v --event access /etc/dnsmasq.conf /etc/dnsmasq.d/ /etc/dnsmasq.d-available/

    while, in another window, did 

    sudo service NetworkManager restart

    inotifywatch detected no accesses.

    After further research, I put the file (all #comments and blank lines, for now) in /etc/NetworkManager/dnsmasq.d/dnsmasq.conf, and ran 

    inotifywatch -t 180 -v --event access /etc/NetworkManager/dnsmasq.d/dnsmasq.conf

    while, in another window, did I 

    sudo service NetworkManager restart

    inotifywatch saw 7 accesses to /etc/NetworkManager/dnsmasq.d/dnsmasq.conf

    The directory /etc/NetworkManager/dnsmasq.d is where dnsmasq.conf is sought, for a NetworkManager controlled dnsmasq

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