CPU Usage vs Load

Don’t confuse the two!

SSH into the DMZ via a bastion host

Are you a sysadmin? If so, your life likely revolves around SSH. If not, you’re one step closer…

sudo make Raspberry Pi a Kiosk

The Raspberry Pi is one nifty little gadget. Install Raspbian and it becomes a capable desktop. Load…

Transactions Are Probably Not As Simple As You Think

Transactions run concurrently, even at serializable isolation level. Many developers mistakenly assume that transactions are run one after another…

PostgreSQL Backups with Logrotate

Coursemology v2 runs a pg_dump every hour to backup the database. It would be nice if a few past backups are kept, and the system automatically prunes the oldest ones to keep the disk usage in check. Hmm that sounds familiar, another program already does the same thing…

Taking the Windows Subsystem for Linux for a spin

Liberate your terminal from the boundaries of the 80x25 serial console

As a sysadmin, I use SSH a lot. More accurately, my world revolves around SSH.

ESTL’s apps run in virtual machines, but I have to manage the bare metal servers when the occasional…

Helping product owners make the leap

Much Ado About Infra

ESTL is a full-stack engineering team. Deploying and maintaining physical infra is very much part of our DNA. It may be…

Using Vim to Create some Test Data

To make it easy for instructors with many students to add them to a course, Coursemology allows…