Practice Exams:

Latest Posts

LPI 101-500 – 109.3: Basic Network Troubleshooting

ifconfig, hostname This chapter is called Basic Network Troubleshooting. The description says candidates should be able to solve network problems on client computers. That sounds worse than it is. You won’t find a bug in the exam that you need to fix. You just need to know the tools that could fix them. And of course you need to know how to use them. And there are different programs here that can take on different tasks. The tasks in this area would be general connectivity routing and the connections themselves….

Read More

LPI 101-500 – 109.2: Persistent network configuration

nmcli So we are now on the subject of persistent network configuration. I have now switched to my live system here, so I’m no longer using the virtual system for this lesson. This is because I wanted to show something with a WiFi connection that does not work with my virtual system. Because an Ethernet interface is virtualized here and not a WiFi interface, I have not yet figured out how to change that and whether you can do it at all. Accordingly, I am now on my live system…

Read More

LPI 101-500 – 109.1: Basics of Internet Protocols part 2

Subnet masks We come to the subnet mask. The computer can use the subnet mask to determine which network it is itself in. Because, as already briefly mentioned, a computer can only communicate directly with another computer if they are in the same network segment. If they are not, the computer knows that it has to send the data, data to the router. We have just talked about the network classes, and the subnet masks have always been mentioned here. Without going into more detail, you will notice that we…

Read More

LPI 101-500 – 109.1: Basics of Internet Protocols part 1

OSI model, ports, address classes So we are back to a completely new topic. Topic 109 deals with the basics of networks in general, and specifically the basics of Internet protocols. This topic becomes not very practical, but very theoretical. I don’t like it either, but unfortunately it has to be. Okay, well, let’s start first of all, very briefly about the story. I wouldn’t expect there to be any questions, but it’s useful to be able to say at least a little. The Internet as we know it today…

Read More

LPI 101-500 – 108.4: Manage printers and printing processes

CUPS, lpr, lpq, lpadmin, lpc This chapter deals with managing printers and printing processes. The printing system used almost exclusively under Linux is called Cups. Cups stands for common Unix printing solution or common Unix printing system. In most operating systems, including including Linux, the printing process is similar. I’m talking about the concept of the queue here. A file that is selected for printing via a program is first placed in a so called printer queue by a print client program, for example Lpr. If there are several files…

Read More

LPI 101-500 – 108.3: Basics of Mail Transfer Agents (MTA)

sendmail, postfix, mailq Before we go into practice, we must first discuss three terms so that you understand the relationships a little better. This chapter deals exclusively with the socalled mta, but I have to mention the other services too. The transmission of emails is usually done by three programs. First we have the mua, then the mda and the mta. mua stands for mail user agent. A male user Agent is an email client program that each of us probably works with on a daily basis, or at least…

Read More

LPI 101-500 – 108.2: System logging

syslog, rsyslog In the Linux environment. It is the absolute standard that various events are recorded in log files. This includes events from various programs, but also events from the Linux system itself. In a professional environment, you can hardly do without logs. If something doesn’t work, you can consult the relevant log files and then usually find out what is wrong in the relevant case. In order for the corresponding log files to be written at all, linux needs a program that takes on these tasks. As almost always,…

Read More

LPI 101-500 – 108.1: Manage the system time

date, hwclock This chapter summarizes the time. Every computer has battery powered hardware clock or cmos clock. It is of course essential that this hardware clock is battery operated, otherwise you would have to reset it every time the computer is switched off. It continues to run like a normal clock or watch, even when it is switched off. The time of this hardware clock can be set in bios or oaf. linux only uses this hardware clock when starting the operating system. The time from the cmos clock is…

Read More

LPI 101-500 – 107.3: Localization and Internationalization

Character codes, iconv This chapter is about localization and international. nationalization, sorry, so to speak, about language settings. Let’s first clarify what is meant by localization. Localization means that a linux system is adapted to the guidelines of a corresponding country or culture. Of course, the first thing to be mentioned here is the language. But there are other things too. For example, the notation of the date format, currencies times, sometimes even colors in graphic programs, and so on. In principle, internationalization is the generic term for localization. A…

Read More

LPI 101-500 – 107.2: Automate system administration tasks by scheduling jobs

cron, crontab This chapter deals with the recurring automatic execution of tasks. For example, it would of course make sense to regularly back up certain petitions, for example, the home petition. But we all know it. We don’t always think about it and neglect the whole thing more often. Or another example on server systems that run 24 hours a day, it might make sense to delete certain log files regularly or to save them accordingly if they are important and everything is automated. And that’s what this chapter is…

Read More