Unattended upgrades in Debian

We use Debian for our systems. Not only because we love it, but also because you can harden and secure it very well. One of the many security precausions for Debian-based Linux distributions are unattended upgrades.

Mastering Vim: Motions and marks

This time I’d like to talk about some some useful tips how to move through a file. Vim motions and marks cannot only be helpful to jump to a specific location, but also to select, copy-paste and delete text passages.

Mastering Vim: Opening files

I think every *NIX admin knows this little gem – the Vi or Vim (Vi Improved) text editor. While the origin vi was written by Billy Joy, vim was cloned, improved and released in 1991 by Bram Moolenaar. In the blog series Mastering Vim, I’d like to show you some tips & tricks.

Sending signals to a Docker container

We all know Docker, right? Running processes in Docker containers is nice and we can easily stop, start or restart the container with simple commands. However, you probably don’t want to “fully restart” a container all the time so sending signals to a Docker container becomes important.

Docker Reverse Proxy

When it comes to (simple) web applications, then most of the time Docker is a perfect fit. However, as you begin to migrate your applications into Docker containers, you might ask yourself how to forward all the requests to the different containers. A Docker Reverse Proxy can help!

sysctl tuning on Linux

While most Linux Kernels nowadays come with nice sysctl defaults, there’s always room for improvement. Some parameters can be used for performance tuning, others can be critical for security hardening. What is sysctl? sysctl is an interface to view and dynamically change parameters in Linux and other *NIX operating systems. In Linux, most of the dynamic Kernel settings can be […]