From time to time I have a need to analyze Apache access logs real quick. In most cases, website owners are noticing some strange activity or unusual traffic peak and…
Tag: Linux
Recently I noticed that one of my OpenVPN servers stopped working. It was just after the update on the Ubuntu 16.04.4 LTS. What I found was that the service failed…
In theory, MySQL replication should work without problems even if the servers are restarted, databases created and removed, data flowing in and out… Sometimes, however, there are errors that are…
I just started to install Ubuntu Server 18.04 Bionic Beaver on new servers. I noticed an interesting thing – once the server is installed, I typically install additional software such…
I own an old laptop which is powered by the Linux operating system. It was always starting in about 20 seconds, but recently I noticed that I have to wait…
I own an electricity meter which is sending 800 impulses per kWh of the power usage. I used to connect it to the Arduino board which was counting these impulses and…
It is said that there are two kinds of people: those who do the backups and those who will. Once you suffer from data loss, you will remember to perform…
From time to time I have a need to manually review logs gathered in the longer time period. I have to merge them together, filter irrelevant information and review most…
On some of our servers, the WordPress installations (but also other apps) are located in the users’ directory. Apache server is accessing them through the symlinks or via specific directory…
My Express-based Node.js application is in most cases used on the localhost since it is still in early development stage. However, I would like to start using Internet-facing domain name…