Linux/Unix Terms You Should Know: Part 3

Part of the learning curve of a new Linux server is learning all of the terminology. You might not be familiar with some of them even if you have experiencing working on other operating systems. In part 3, we will look at some more of these terms.

daemon – This is a program that is often started at boot time and continues to run on the system in the background. Another term for a daemon is a service. If a daemon is not started at boot, you can usually still start or stop it on demand. Some daemons may include the web server, database server and DNS server.

hostname – This is the formal name of the server that designates how it will be recognized on the network. Every server has a hostname, and it will generally be a unique name on that network. For internet-connected servers, their hostnames will be part of a fully qualified domain name (FQDN).

kill – In part 2, you learned about processes. In the event that you need to stop an unresponsive process, the “kill” command can handle that. In general, killing a process involves typing “kill” followed by the process identification number (PID). If you need to kill a process based on the name and are not worried about killing any processes associated with it, use “killall”.
In part 4, we will explore some common Linux commands that you will likely need to know when you start work on your sever.

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