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Generally only suggested for Intel NIC, RPi uses a Broadcom NIC.

I would also recommend the zswap mod if you intended to use an interface other than Axis, there is a reference to that in the index.

Once you have networking setup you can configure your Mesa card as you would for a normal PC, there are plenty of threads on the forum regarding this subject, there is nothing particular to the RPi platform in this respect.

ah great! i managed to get connection to the mesa card and wifi simply through the sudo menu-config . like i said, i had gone through all the posts mentioned above, but going through them with index page you mentioned helped quite alot. now i can ping the card at 10.10.10.10 and get responses.

my next question is,

auto eth0
iface eth0 inet static
address 10.10.10.100
netmask 255.255.255.0

is sufficient in the interface file or shall i also add

hardware-irq-coalesce-rx-usecs 0 after netmask? and whats the significance of this line? Thanks again!

As the image is there is no root password, it is too easy to mess up the system when using root. As I stated in my first post you need to use sudo. It would be best for you to search to how to use the sudo command for tasks that require elevated privileges.
Teaching one how to use Linux is not something that I am willing to do on the forum and quite frankly there are many quality tutorials on the net.
This one www.debian.org/doc/user-manuals#debian-handbook whilst it maybe for an earlier version of Debian it is a good start, and you should be able to find something in your native language.

what is the root id and password sir? i only know the default user credentials "cnc" with password "cnc"

Please read the major thread regarding the RPi, it's a sticky.

Regarding editing files under
/etc you will require super user privileges, please use your favourite search engine to learn how to use sudo.

Once again it is not very helpful when a user says that something doesn't work without any error messages or the sort.

Once in the main RPi image thread I have written examples,covering many circumstances regarding network setup and what needs to be addressed in the network file.

There is even a sticky thread that is an index to the main RPi image thread.
forum.linuxcnc.org/38-general-linuxcnc-q...l-images-only#325007