How to change DNS server by command line?
What is your experience in changing DNS server?
Is there a standard way to do this? I know I can change DNS using /etc/resolv.conf, but in my case I have several hundreds of DHCP clients and I want to automate the process to change DNS automatically every time they get new address and I am not going to take care of writing scripts.
Dnsmasq provides a mechanism for this. You can set the DNS servers at startup using one of the options described in the dnsmasq man page.
How to change DNS in Ubuntu command line?
In this article, I'll show you how to connect a Raspberry Pi to the net using the dd-wrt firmware which in turn will change your router DNS IP address.
The following guide was updated to reflect the current release of the firmware for the DD-WRT and Linux distributions. Most users will be able to follow this tutorial to a tee as the settings required are all the same. You'll have to enter into the router console first and then update the files to save your configuration after modifying them.
Note: You should be able to run this tutorial on any Raspian image as I haven't tested any other Linux OSes. Download DD-WRT Firmware / Setup Image. DD-WRT is a free open source firmware for 802.11n routers manufactured by Mikrotik. It allows you to extend your wireless LAN network and protect your privacy.
To begin with, this tutorial doesn't really require you to download a file. If you do, the following link can be used to easily locate a version of DD-WRT for Raspberry Pi that best suits your needs; however, keep in mind that it's a beta release.
Once you download and extract the archive, the firmware should appear on your desktop or directory. If it didn't, you may need to open a terminal./dd-wrtImageInstall
Once this has completed, DD-WRT will flash (update) the firmware image to your router's memory on the next reboot. After that you will be presented with a splash page informing you that the firmware was successfully flashed. It may take a few minutes for this to complete depending on your hardware.
Configure Your Router's Settings. Next we will navigate to the Router's web address on 192.168.1
If you haven't already, you need to log in to your router. To do so either click on "Web Based Settings", choose "Network Settings", click "Router Settings" or type this into the address bar: "" From here, we will be configuring your connection through the web interface which may be slightly different from your router's physical interface.
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