port

Java: Spring Boot application as a service using SysV on Ubuntu 14.04

Although in modern architectures you typically see Spring Boot executable jars running as the primary process of a container, there are still many deployment scenarios where running the jar as a service at boot time is required. With Ubuntu 14.04, we can use SysV to run a Spring Boot application at boot time.   This will Java: Spring Boot application as a service using SysV on Ubuntu 14.04

Java: Spring Boot application as a service using systemd on Ubuntu 16.04

Although in modern architectures you typically see Spring Boot executable jars running as the primary process of a container, there are still many deployment scenarios where running the jar as a service at boot time is required. With Ubuntu 16.04, we can use the built-in systemd supervisor to run a Spring Boot application at boot Java: Spring Boot application as a service using systemd on Ubuntu 16.04

Ubuntu: Using tcpdump for analysis of network traffic and port usage

tcpdump comes standard on Ubuntu servers and is an invaluable tool in determining traffic coming in and out of a host. As network infrastructures have become more complex and security conscious, validating network flow from client hosts through potentially multiple proxies and ultimately to a destination host and port has become more important than ever. Ubuntu: Using tcpdump for analysis of network traffic and port usage

SaltStack: Troubleshooting Basic Network Connectivity of Minion on Ubuntu

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