Nix on Benny Simmonds

Managing multiple SSH GitHub identities

Fri, 12 Dec 2025 08:07:00 +1100

Now I’m involved in multiple businesses, I’m finding I need to frequently juggle multiple SSH key pairs (aka identities) with choose your favourite git offering (e.g. GitHub). When I push and pull to origins on the same machine, I need to alternate the identities I use.

The best approach is to use an SSH config file to define host aliases. This lets you seamlessly use different keys without manually switching anything.

SSO with Active Directory

Fri, 04 Jan 2019 11:10:10 +0000

Providing SSO by integrating Linux (or FreeBSD) with a directory service, like Microsoft Active Directory (AD), is no where as daunting as it once was, and highlights some fascinating subsystems that enable users to be defined from a variety of data sources (such as LDAP) other than just the traditional /etc/passwd file.

Initial setup

Update /etc/resolv.conf to bind to the AD DNS server. This will enable realmd to discover and join the active directory domain (i.e. kerberos realm).

GnuPG

Sun, 02 Mar 2008 17:16:07 +0000

This semester I have enrolled in a security unit at my local University. Before we get into the mechanics of modern security techniques (mathematical theory, ciphers, protocols, hashing, Kerberos), the first lecture kicked off with a gentle overview of PKI and the basics of using the GNU Privacy Guard, aka GnuPG or GPG for short. In short it is a complete and free implementation of the OpenPGP standard.

Generate a key pair: