>> You definitely can use Linux with few simple servers with 128 MB RAM. > > This is not difficult, you just need to run `htop` and perform addition of the RES column (which is in KB unless a unit is shown). Example:

I'm not quite sure what points this makes... That's supposed to fit on 128MB? And it doesn't include memory consumed by the kernel itself (which is not negligible at this scale), and linux needs spare for cache to work remotely decently.

    $ awk '{ tot+=$2 } END { print tot /1024 }' < list
    214.035

Toms root boot (TOMSRTBT) is what you need! Used to fit on a floppy disk.

https://en.wikipedia.org/wiki/Tomsrtbt