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Sep 10, 2017

A service asks for a PEM file, a PKCS#8 key, and an X.509 certificate. Those names describe different things, and mixing them up makes TLS setup …

Dec 13, 2015

A container lab is easier to debug when you know which layer owns the failure. “The container can’t reach the network” could mean a problem …

Jan 2, 2014

You want several disposable Linux environments on one machine. Containers and virtual machines can both get you there, but they do not give you …

Jan 1, 2014

An installer can print “done” while leaving the machine one reboot away from failure. The interesting engineering problem is the transition …