4 Posts

Troubleshooting Disk Space Usage

October 16, 2017 0 Comments ubuntu

A couple years ago, my coworker wrote a great post on finding disk space issues in Linux and how to resolve them. Helped me out this weekend when a critical server was having issues, so wanted to post it here:


For future reference (after reading the post above)

Show filesystem usage:

~$ df -h

Show all

SSH with Duo MFA and Active Directory

August 30, 2017 0 Comments duo, mfa, ubuntu, active-directory

Duo has thorough documentation for adding MFA to your SSH sessions, but there are a couple additional steps needed to also integrate with Active Directory. This post will go through the installation for both Duo and Active Directory for Ubuntu 16.04. For other Linux distros, the Duo documentation linked above has you covered.

System components:

  • Ubuntu 16.04 server

Duo Security - HA Radius Servers

November 18, 2015 0 Comments duo-security, ubuntu

If you are using Duo Security MFA (highly recommended), you may want high-availability for your Duo Radius servers.  Duo doesn't currently have a "supported" solution for this, but keepalived worked great after a quick call to support.  This is also assuming you have followed Duo's instructions to install their radius server (found here)

First, install keepalived (basic instructions