I would be interested in a Swift port for Linux server-side/command line dev. Not so much client UI dev. Swift on Linux servers could help Apple sell more Macbooks to developers.
And Microsoft puts money on F#, Haskell and OCaml, all of which already have better Linux support.
Swift is great for pushing functional programming down the throat to mainstream developers that wish to target iOS, but it is no more pragmatic than OCaml or F#.
For the OP use case, targeting Linux server software is already better served by the languages I mentioned.