what is the right command(sequence) for adding new tool?

There are lots of ways to do this.

There could be a plug-in for Fusion that exported a LinuxCNC-formatted tool table (in the current format), or a utility for LinuxCNC that output a Fusion format tool table. This would work poorly with the current tool table, which knows too little about the tools to be all that useful to Fusion. If the tool database was implemented then this would be less of a problem. ]

And then the paragraph above, with Fusion replaced by FreeCAD.

I don't know of a universal standard for sharing tool table data.

So as Fusion 360 is used by a large portion of us as it is available at no cost it should be supported.
Also, Autodesk are open on their formats.

Sorry, but I will never ever use or even try Fusion 360 or any other software from Autodesk.
I don't support companies, that have robbery as base of their comercial doing ...
Autodesk: you can use our software, but your work belongs to us. FUCK NO!

If you send me a tool table from fusion, I will have a quick look - but I definitively won't spend much time on it.
.

Then there is the freecam world ...

Do you have some links?

The only good solution I know, that runs on linux systems is CamBam - and that is shareware. Not expensive and worth every dime, but not free.
But it runs on linux and there is support for linux ...

My first choice!

Deskproto is another affordable CAM - not free too and it does not run on linux.
But it runs standalone without network access, so yes, it would be a choice.

If you know any CAM system, that runs on linux and has support for linux, I would be happy to hear about it.
.

... with Fusion replaced by FreeCAD.

Sorry Andy - but here I disagree completely.
FreeCAD is bullshit and is not usable if you want to do CAD in serious.
The developer don't have a leader - any one codes on its own nose, which leads to fully incompatible worksheets. I followed freecad for some years, but then I gave up - for me, its crap only and not worth to spend the time in learning how to work withit.

cheers Reinhard

Why are you so harsh on FreeCAD? I've only played with it a little bit in the past year, but I thought it made pretty nice tool paths once I figured it out. I really don't have much experience with other CAD programs though, but working with FreeCAD was very different from the one CAD/CAM I do know. (Enroute)

Hi Todd,

as long as you only play withit, things seem to be acceptable.
Just try to realize a "real" nontrivial Model and apply changes that happen during time being.
... and then tell me, that freecad did not waste your time, broke your model without recovery-possibility ...

What do you consider non-trivial?
This? forum.freecadweb.org/viewtopic.php?f=24&t=39967
Or maybe this? forum.freecadweb.org/viewtopic.php?f=24&t=39829
Or what about this? forum.freecadweb.org/viewtopic.php?f=36&t=38264

I'm no expert on FreeCAD, but it seems like some people are able to do some real and non-trivial work in it to me!

I have to agree with Moz on this, although i am not using freecad, but i did try it several times after the initial "there is nothing here" try to choose a "workbench", then things change, a lot.
At that time i was not aware there is a CAM for it so i moved on to BlenderCAM, and this is a beast! Learning it seems very hard at the start, but as you learn bits and pieces, things tend to get quite enjoyable after a while.