My question may sound basic but I haven't found a way to do it.
I can edit my hosts data massively but is there a way to do it for names ?

For example I would like all my servers toto_tata1, toto_tata2, toto_tata3 to be named toto.tata1, toto.tata2, toto.tata3...

I tried via interface, va hosts.conf file without success so far.
Any help would be appreciated