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LPI 101-500 – 107.1: Manage user and group accounts and associated system files

useradd, userdel, passwd In the working life of a system engineer or classic administrator. We will often be confrontated with topics from the following lessons because this is about users in general create users, create groups, change passwords, delete users and so on. So let’s maybe be start by creating a user. The command for this is user ad. Let’s take a look at the man page user at user ad create a new user or update default new user information. Of course we have various options here which are…

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LPI 101-500 – 106.3: Accessibility

Accessibility This lesson is about accessibility. What kind of auxiliary programs are there and what do they look like? First of all, we can say that most linux distributions have such auxiliary programs. preinstalled or are part of the standard and have been implemented directly with ubuntu. You can find these programs in Settings and Universal Access. At the top of the window we find two words for people with visual impairments. First of all, we can set a high contrast. Here you see, we get the greatest possible contrast…

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LPI 010-160 – User Accounts and Groups part 3

Managing Groups In this lesson, I want to show you how to manage groups. This includes creating a group, adding people to those groups and renaming a group. So before we can get started here, we need to create a user. And I’m going to do that by using pseudo. I’m going to put the user adm, which says create me a matching home directory for this username and whatever that username is going to be. In my case I’m going to use Tim. Then I’m going to go ahead…

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LPI 010-160 – User Accounts and Groups part 2

Creating Accounts from the Shell In this lesson, I want to show you how to create a new user account from within your shell. So I’m already logged into my terminal here as my standard user of deon training. If I want to create a new user, I have to do that using sudo because I have to be a root or an admin to create new users on a system. So let’s go ahead and use pseudo. We’re going to use add user, which is the command we want…

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LPI 010-160 – User Accounts and Groups part 1

Understanding User Accounts Let’s talk about user accounts. Like most other modern operating systems, Linux is a multiuser operating system. This means that a single Linux computer can support many users. Each of these can have their own unique account. Now, in previous videos I’ve referred to accounts in passing but we really haven’t covered them in detail yet. In this video we’re going to describe the important account principles and some commands that can be used to work with these accounts. As we move further along in the course…

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LPI 010-160 – Networking Basics part 2

Network Protection These days, one of the most pressing issues involving technology revolves around system security and data protection. In this lesson, we’re going to discuss a few basic tips to help prevent your Linux system from getting compromised. First, shut down unused servers. Linux’s major security vulnerabilities aren’t inside of worms or viruses like they are with Windows. Instead, Linux risk is going to be sitting on the fact that outsiders can try to break in and abuse server programs that are running 24 hours a day, seven days…

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LPI 010-160 – Networking Basics part 1

Network Features Networking is a critical part of modern computing. Most Linux distributions are already capable of creating network connections automatically for you. On some rare occasions, though, this process simply doesn’t work right. Or there may be a need to tweak the connection or debug a problem that’s occurring. To begin, there are some common networking terms and definitions that we need to discuss. DNS is our first one. DNS is the domain Name system. And DNS is a global network of servers that translates between host names and…

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LPI 010-160 – Managing File Ownership and Permission part 2

Using Sticky Bits When investigating the Linux directory tree, there are going to be certain file types that are going to require special attention from you. Sometimes a user may just want to be aware that these special files exist and how they’re handled because they’re going to deviate from what is expected based on what has been previously covered in the other videos we’ve talked about. For example, a user could delete a file without having write permission to it. Now this may seem like a bug after all…

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LPI 010-160 – Managing File Ownership and Permission part 1

Setting Ownership Linux is a multiuser operating system like we’ve talked about before now, because of this we have lots of users accessing the same system so how does a user secure their files against unwanted access by those other users? Well. Linux handles these tasks through two types of features. When you’re dealing with files and directories, this is known as ownership and permission. Every file has an associate, owner or account with that file or directory it’s linked to. It as well as its associated group. Now, in…

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Google Professional Data Engineer – VPCs and Interconnecting Networks part 8

VPC Network Peering Another way to connect networks across Google cloud platform is by using Vpc network peering. This can be used to connect networks which are in different projects as well as in different organizations. Vpc Network Peering differs very significantly in a structural way from shared Vpc. The main logical differences are the networks that are peered are administered illustratively separate, they have their own firewall rules and policies and can be administered separately. And the second point of difference is that you can peer networks from different…

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