Get to know Docker in 15 minutes

This post introduces the evolution of Docker, commonly used Docker commands and caveats that a long-time IT pro ran into as a first time Docker user.…

Read this article

Cross Compile for Debian Stretch Using sbuild on Ubuntu 18.04

This article describes using sbuild to cross compile Debian packages on a Ubuntu machine. I assume the reverse (though I didn't test) is equally true. sbuild requires Debian Stretch or later, and should work on Debian derived distributions.BackgroundMany systems are based on a Debian distribution that native compilation isn't…

Read this article

User Space Bootstrap in EdgeRouter Firmware 2.0

BackgroundUbiquiti released firmware v2.0.0 for EdgeRouter models at the turn of 2019. FW 2.0 is based on Debian Stretch and has been in development for the past two years or so. Cavium models come with Linux kernel 4.9.y. ERX series come with kernel 4.14.…

Read this article

A Simple Tool to Test malloc Performance

I was porting this very interesting feature to an older Glibc version for ARMv7. I need a simple tool to gauge any performance boost (or drop for that matter). Surprisingly few information is available on this topic. I didn't search hard but most papers on malloc performance dating back to…

Read this article