In 2014 I worked for a food delivery startup as sysadmin (pizza.de, now sold at least twice). We used a bunch of shellscripts and m4 to manage a lot of linux s

In 2014 I worked for a food delivery startup as sysadmin (pizza.de, now sold at least twice). We used a bunch of shellscripts and m4 to manage a lot of linux servers and config-files in a similiar fashion to what ansible does (which was not really a thing at the time). It worked ok, but I hate the m4 syntax to this day.