Sebastian Mogilowski's Blog

Systemadministration

Securing SSH with FIDO U2F (YubiKey) on Debian

  • 8. März 2021
  • Linux / Systemadministration
  • 1 Comment

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…

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Ubuntu Yubikey U2F Auth

  • 16. Februar 2021
  • Linux
  • 0 Comments

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…

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Monitoring VMWare vSphere with Grafana and Telegraf

Monitoring VMWare vSphere with Grafana and Telegraf

  • 13. Juli 2020
  • Systemadministration / Virtualization
  • 0 Comments

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…

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Installing Galera Cluster with MariaDB

  • 4. Juni 2020
  • Linux / Systemadministration
  • 1 Comment

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…

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Docker on Debian 10 managed with Cockpit

  • 7. Mai 2020
  • Linux / Systemadministration
  • 0 Comments

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 -…

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Servermanagement with Cockpit on Debian 10

  • 7. Mai 2020
  • Linux / Systemadministration
  • 2 Comments

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,…

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Two-factor authentication with Guacamole 1.1.0 (Part 4)

  • 6. Mai 2020
  • Systemadministration
  • 6 Comments

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…

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Setup LDAP/AD authentication for Guacamole 1.1.0 (Part 3)

  • 6. Mai 2020
  • Systemadministration
  • 14 Comments

If you don't want to add all your users to the guacamole db for authentication you can combine the DB authentication with LDAP authentication. (You don't have to modify your…

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Your own search engine with Apache Nutch 1.16 on Debian 10

  • 9. April 2020
  • Allgemein / Linux / Systemadministration
  • 1 Comment

In 2016, I wrote an article for the Linux Magazine about an personal search engine: * Suchmaschinenserver im Eigenbau (Ausgabe 02/2016)* Go Find It (Issue #186 / May 2016) A…

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Setup Windows 10/Server 2016 RDP to work with Guacamole 1.1.0 (Part 2)

  • 24. März 2020
  • Linux / Systemadministration
  • 1 Comment

Currently Guacamole 1.1.0 is not compatible with the default encryption of Windows. If you disable NLA it should work. Open Registry editor 'regedit' and make the following settings: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp]…

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