End Fed Antenna
How to build an End Fed Antenna for 10m/20m and 40m. It is also possible to build one for 80m and 160m. I used this manual from PD7MAA http://pa-11019.blogspot.com/2012/04/149-transformer-for-endfed-antennas-35.html. I…
Using Rigol oscilloscope under Linux
Controll and view Rigol oscilloscope with DS Remote under Linux. I'm using a Rigol DS1202 with Ubuntu 20.10 (Groovy). First install DS Remote: sudo apt-get update sudo apt-get install g++…
Securing SSH with FIDO U2F (YubiKey) on Debian
FIDO devices are supported by the public key types "ecdsa-sk" and "ed25519-sk", along with corresponding certificate types. This is supported in OpenSSH from version 8.2. Debian Buster (stable) delivers version…
Ubuntu Yubikey U2F Auth
Yubikey is a hardware security device. You can use it for two-factor authentication. Here is an example setup for two-factor login for Ubuntu Linux. I recommend to use at least…
Monitoring VMWare vSphere with Grafana and Telegraf
Collector Configuration You need the latest Telegraf version which includes the vSphere Plugin! On Ubuntu or Debian you can get it with: wget https://dl.influxdata.com/telegraf/releases/telegraf_1.14.5-1_amd64.deb sudo dpkg -i telegraf_1.14.5-1_amd64.deb Now add…
Installing Galera Cluster with MariaDB
Galera give you some nice cluster features. Like true Multi-Master configuration, synchronous replication, conflict detection and impromes the maintenance of your MariaDB servers with automatic provisioning, node isolation and rolling…
Your own search engine part 2: web interface
Please read part 1 first. Once we have built the search engine, we need a nice web interface for it. I created a simple one with AJAX Solr. You can…
Docker on Debian 10 managed with Cockpit
With Cockpit, you can also manage docker containers. Here is a small example setup: Install Docker apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -…
Servermanagement with Cockpit on Debian 10
Cockpit is an easy and simple remote management software for Linux servers. It is now included in Debian 10 Buster.It runs on several Linux distributions, including Debian, Ubuntu, Fedora, CentOS,…
Two-factor authentication with Guacamole 1.1.0 (Part 4)
You can add totp-auth to your Guacamole login process. You can use any TOTP App like "Google Authenticator" or "OTP Auth" to add a two-factor authentication to Guacamole. First download…