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linux

April 18, 2022

SSH Key Generation

The ssh-keygen utility is used for ssh key generation. This post will walk you through how to generate a new ssh key, configure its use, and use it for authentication against the hosts or systems you need to authenticate to. At the end we will walk through how to test ssh key and password … [Read more...] about SSH Key Generation

docker,  linux,  ssh

vault pki secrets engine

March 9, 2022

Vault PKI – How to run a CA with Hashicorp Vault

This article will demonstrate how to run a CA (Certification Authority) with Hashicorp Vault using the vault pki secrets engine. The examples provided will be in the form of a development environment using Docker. Before continuing it may be helpful to read our previous article on running vault in … [Read more...] about Vault PKI – How to run a CA with Hashicorp Vault

docker,  linux,  SSL Certificates,  vault

certbot apache ubuntu

February 24, 2022

certbot apache ubuntu

This article will demonstrate how to automate the renewal of SSL certificates, specifically letsencrypt certificates, using the certbot utility with apache on an ubuntu OS. The examples in this article will work on Ubuntu 18.04 and greater. They may also work on previous version of Ubuntu but if … [Read more...] about certbot apache ubuntu

letsencrypt,  linux,  SSL Certificates

Perl DBI

February 7, 2022

Perl DBI – Database connections with perl

What is Perl DBI? It is the Perl Database Interface which supports database programming with perl. As any good interface does, it provides a user facing set of methods and variables to make database connections and commands with. The interface hides the underlying details of the database being used, … [Read more...] about Perl DBI – Database connections with perl

docker,  linux,  perl

sendmail vs postfix

December 17, 2021

Sendmail vs Postfix – Mail Transfer Agent Comparison

Sendmail vs Postfix - both are Mail Transfer Agents (MTA) used for sending mail from a Linux host. The primary concerns when deciding which MTA to use come down to performance, ease of use, and security. Postfix is the most commonly used MTA, for good reason. It is a security oriented mail server … [Read more...] about Sendmail vs Postfix – Mail Transfer Agent Comparison

linux

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