Introduction Your Linux servers are running smoothly? Fine.Now if something incidentally gets wrong you need also to prepare an emergency plan.And even when everything is going fine, a backup that is directly stored on the same server can still be useful: for example when you need to see what was changed on a specific file, […]
History of Software Engineering Since the 1940s when software engineering started close on hardware level until today on various technologies like embedded systems, web and mobile apps the demand on development process has increased tremendously. As a result in the 1980s the cost of owning and maintaining was twice as expensive as developing software. The […]
Introduction Having a complete history of all typed commands can be very helpful in many scenarios: when several administrators work together on the same server and need to know what was done previously when someone need to redo an older sequence of commands or to understand an undocumented maintenance process for troubleshooting or forensic analysis, […]
Hardware clustering is frequently used in computer systems where high availability and scalability are needed. In horizontal clustering the same application software is typically installed on multiple identical nodes. For web applications load balancing software such as Cisco’s ‘Global Site Selector’ is used to direct client requests to nodes based on rules (fig 1). The […]