All Linux distros have their Linux filesystems laid out in accordance to the Filesystem Hierarchy Standard. Linux administrators need to understand what the different directories are, and the purposes for which each directory is used.
This is a linux administration tutorial from BeginLinux Guru. It tells about the linux directory structure on a linux file system. ... https://www.youtube.com/watch?v=lpyKA30GCPY
Is Linux Secure? Well, yes and no. Linux does have certain design characteristics that make it more secure than Windows, but it can be configured in an insecure manner. In fact, Linux administrators need to know that an out of the box installation on a Linux server is definitely not secure. In this video, the BeginLinux Guru shares some general knowledge about secure Linux configuration.
Links to referenced articles:
https://it.slashdot.org/story/20/04/19/0040223
https://www.fudzilla.com/news/50858-attacks-on-supercomputers-were-crypto-miners
Purchase links for my book, Master Linux Security and Hardening, Second Edition:
Directly from Packt Publishing:
https://www.packtpub.com/cloud-networking/mastering-linux-security-and-hardening-second-edition
From Amazon:
https://amzn.to/2zgWXiR
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https://www.youtube.com/watch?v=qQbWmQzxtUQ
In "systemd Basics Part 1", we'll cover the "systemctl poweroff" and "systemctl reboot" commands. We'll also see how you can still use the old "shutdown" commands for more flexibility with administering your Linux servers. For both present and aspiring Linux systems administrators, learning systemd is an absolute must.
A linux administrator tutorial from beginlinux guru.
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https://www.youtube.com/watch?v=AEvyaObN2g8
This systemd security flaw, which was accidentally introduced in 2015, creates a DNS security flaw on affected systems. It works by allowing an attacker to perform a buffer overflow attack against an affected Linux system, which in turn would either crash the machine, or allow the attacker to perform a remote code execution attack. The referenced article indicates that the flaw is present on Ubuntu 16.10 and Ubuntu 17.04, but it would also be present on other Linux distros that use the affected versions of systemd. If you're a Linux administrator, you need to get these affected systems patched as soon as possible. Linux security after all, is very important.
Link to article:
http://www.theregister.co.uk/2017/06/29/systemd_pwned_by_dns_query/
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https://www.youtube.com/watch?v=tjBM6tB2bfM
File permissions and directory permissions settings work the same on both Linux and Unix. To set either Linux permissions or Unix permissions, just use the chmod command. To change the default permissions settings on file that you want to create, use the umask command. This is good information both Linux systems administrators and Unix systems administrators.
Hopefully, this will help you effectively use linux and unix file permissions.
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https://www.youtube.com/watch?v=K9FEz20Zhmc
This Ethereum Classic airdrop scam will cause you to have your Ethereum stolen from you. I encountered this scam via an advertisement on Ethereum Classic faucet, but you might also see it advertised on other cryptocoin faucets or cryptocurrency faucets. It's a classic cryptocoin scam or cryptocurrency scam, so don't fall for it. Trust me, cybersecurity awareness is extremely important.
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https://www.youtube.com/watch?v=W1TS9NLGguA
In this chapter of systemd Basics, we'll look at systemd targets, and how they equate to the old Red Hat style of runlevels. We'll see how to use the systemctl utility to change from one target to another, and to set the default target.
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https://www.youtube.com/watch?v=10Ijrc9k71g
FreeIPA provides centralized identity management on Linux networks, similar to what Active Directory does for Windows networks. In this lesson, we'll look at how to install FreeIPA on a CentOS 7 server.
Check out my new book at Packt Publishing, "Mastering Linux Security and Hardening".
https://www.packtpub.com/networking-and-servers/mastering-linux-security-and-hardening
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https://www.youtube.com/watch?v=oCFEY2d8PSM
In this next video of the Basic Linux and Unix series, we'll look at how to use the useradd utility to create user accounts on non-Red Hat systems, such as Arch Linux, Slackware, Debian, or Ubuntu. We'll then look at the adduser utility, which is unique to Debian, Ubuntu, and anything that's derived from them.
I hope that you enjoy this basic Linux tutorial for Linux beginners. Remember, if you want to become a good Linux systems administrator, you want to become good at the Linux command prompt.
Be sure to check out my Amazon affiliate bookstore!
http://astore.amazon.com/beginlinuxguru-20
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https://www.youtube.com/watch?v=qyOuq_cb_7s
In this lesson, we'll look at how to manage Linux daemons, or Linux services as they're now called, using the systemctl utility of systemd.
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https://www.youtube.com/watch?v=IuDmg75n6FU