A rather obscure OS, Minix3 ,...
When I did this, I still had not learned about the 'import' command on ImageMagick and was
using 'scrot', which is fine, but ever since I found out how to use the 'import' command, I no
longer use scrot.
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These are a couple more,
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Minix3 was not as easy to get running as OpenBsd.
OpenBsd pretty much "just worked", with Minix3 it was a bit more complicated. I found
that there are packages from the NetBsd sources that will work though.