Syslog is a message logging standard has been around for decades, but has renewed popularity as a method of log capture with the advent of containerization and centralized logging solutions. Enabling an Ubutu 14.04 or 16.04 host to act as a syslog server only takes a few simple steps.
When tasked with deploying a web application and it is not responsive to your browser requests, sometimes you need to take a step back from the complexity of your full stack and run a quick sanity check. You can use netcat as a simple web server to prove to yourself that the network infrastructure is … Ubuntu: Simulating a Web Server using Netcat
Although virtualization has pushed a self-service culture for infrastructure, it is still common in production environments to need your Network Operations team to open the required ports necessary for any new application deployment. So, while you may be able to create the base virtualized host, you can’t go much further without the network connectivity. And … Ubuntu: Pre-Validate Network ACL and Firewall Connectivity with Netcat
When troubleshooting basic connectivity from your SaltStack minions to your Salt master, the first thing to remember is the basic flow – the minions initiate the connection to port 4505/4506 on the Salt master. With this in mind, if you have modified /etc/salt/minion so that the master is explicitly set and logs are set to … SaltStack: Troubleshooting Basic Network Connectivity of Minion on Ubuntu