20 years back I remember chatting to a sysadmin over beer and the conversation included "Linux mostly does either whatever Solaris does or whatever BSD does, yo

20 years back I remember chatting to a sysadmin over beer and the conversation included "Linux mostly does either whatever Solaris does or whatever BSD does, you just have to check which it is before trying to write anything." (this was not a complaint, we were both veterans of the "How Many UNICES?!?!?!" era)