Understanding the bin, sbin, usr/bin , usr/sbin split: "Of course once the split existed, some people made other rules to justify it.
Root was for the OS stuff you got from upstream and /usr was for your site-
local files. Then / was for the stuff you got from AT&T and /usr was for the
stuff that your distro like IBM AIX or Dec Ultrix or SGI Irix added to it, and
/usr/local was for your specific installation's files. Then somebody decided
/usr/local wasn't a good place to install new packages, so let's add /opt!
I'm still waiting for /opt/local to show up..."
'via Blog this'
