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Conceptually this is similar to the Stripped Solaris approach I refined from Tony Bates back in 2008 which he implemented for a major FI with nine-nines of uptime for years. Since 2013 Google and others have taken this idea further (CoreOS, Ubuntu Snappy, Redhat Atomic) with the concept of core operating systems with the key benefits (again some borrowed from Solaris),

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Here are the differences between a minimal virtual machine, minimal and normal per Bonsai Framework setup instructions (no updates though) and then fresh reboot.

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Code Block
languagebash
free -h # how much memory used
ps aux | wc -l # how many processes (including the two to run this command)
df -h | grep root # how much disk used (not going to bother counting the small 30MB for boot
dpkg --get-selections | wc -1l # how many packages installed

Ubuntu 16.04.1

Running inside of VMWare Fusion. 2GB Memory and 2 CPU's assigned.

AttributeMinimal Virtual MachineMinimal *unchecked standard system utilitiesNormalRecently Ubuntu Snappy 15.04Microsoft Azure Default Image
Packages

217
236 (with open+ openssh-ssh-client)
251 (with open+ openssh-ssh-server)

223

430

[*] standard system utilities selected
no ssh

438 (+ openssh-server)

2 core packages containing minimal utilities439489 (built with ssh)
Memory Used (measured shortly after Initial boot)35 MB62 MB80 83 MB165 MB (this does not look right)97 96 MB

Tasks (minus 2 to run the commands)

* System needs time to settle after boot.

Initial boot - 8:00PM
202 200 - 8:00PM
161162 - 9:30PM

Initial boot - 9:22PM22
178 176 - 9:45PM45
169 167 - 10:12PM12
169 167 - 10:24PM 24

223 (did not let it settle)

Initial Boot - 10:50
223 - 10:53
186 - 10:56
186 - 11:11 

174 (did not let it settle)152 (double check this does not look right)

133 - 2:20
133 - 3:04

Disk Space Used733 735 MB992 MB1.3 GB639 MB1.9 GB (need to double-check this on a fresh install)3 GB
Key Advantage

Reduced fat due to uniformity of virtual machines.

Minimal to run a normal Server.Already includes popular admin packages.Upgrade core OS as 1 package and revert btw OS upgrades quickly. Made for pure Cloud.

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