netcat – The Mighty One

terminal

Once in awhile sshd will break on your server, maybe after an update and you need to send long lines, maybe a cipher list from one server to another. Typing on console it’s an option […]

Enable Debug For Shell Scripts

terminal

Debugging shell scripts comes handy, especially when unexpected things happen. Trust me, they do. I use two different approaches, based on what’s needed: debug while running it or when ran in the background, maybe by […]

Linux: Keep That Process Running

For whatever reasons a process can crash. The best is always to find out why and fix it. However, sometimes you can have higher priority tasks and you want that process to be running. With […]

NGINX Headers For Docker

In case you run docker behind nginx some of your container might need specific headers otherwise a browser trying to access them might want to connect to a local or private address, something like https://127.0.0.1:8080. […]

How To Extend HDD

How to extend ZFS on FreeBSD How to extend ext4 on Ubuntu using LVM (Linux Volume Group)

LibreNMS & docker-compose

librenms

If you don’t know LibreNMS, it is a great monitoring tool with auto discovery, auto operating system detection, custom alert settings, extended application support and more. For details check out: https://www.librenms.org, https://github.com/librenms I was recently […]

Fun With /etc/cron.*

If you are reading this you probably know what /etc/cron.hourly/ , /etc/cron.daily/ and so on does. What you might not know is that on CentOS, RHEL, Fedora you can name a script living in these […]