I self host a Grav site among other things on a 15 Euro VPS.
Also, I started with Ghost but the fact that they locked up the newsletter side of business to a single provider and were unwilling to rework things at the time made me walk away. Yes, I know you could go code side, and add others, but that was a complicated setup in itself. Grav works perfectly for me.
Not exactly Linux, but Haiku. Been rooting for them for years. Because I used BeOS and I must admit, it was light years ahead of the rest. Haiku though does not seem to be doing too well.
The irony
I’m sorry. I thought I had replied to this. Yes. That Grav.
Grav.
I am currently using this to do exactly what you are doing. I moved from Ghost cause of many reasons. Can share links in PM if you want.
Used this in an 05 Jetta until earlier this year. It handled calls too.