Tech Republic Security

FEBRUARY 25, 2020

For security reasons, you might need to create a Linux user without the ability to log in. Jack Wallen shows you how.

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Tech Republic Security

MARCH 28, 2023

Learn how to protect your Linux server from the fork bomb denial-of-service attack with this video tutorial by Jack Wallen. The post How to prevent fork bombs on your Linux development servers appeared first on TechRepublic.

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Tech Republic Security

FEBRUARY 19, 2021

Jack Wallen shows you how to gain a bit more security on your Linux servers by blocking users from adding cron jobs.

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Network World

FEBRUARY 3, 2025

A challenge for enterprises that operate large-scale network infrastructure has long been how to maintain performance while updating critical systems. The Linux Foundations networking division (LF Networking) is helping to address that challenge with the L3AF project, which is based on eBPF (extended Berkeley Packet Filter ) technology.

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Tech Republic Security

JANUARY 21, 2021

Jack Wallen walks you through some of the steps you can take to check for and mitigate distributed denial of service attacks on a Linux server.

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Network World

NOVEMBER 6, 2024

There are several ways to loop “forever” on Linux commands. This post provides some examples of how to do this. In practice, this means only until you decide to stop looping. You might do this while typing commands on the command line, or, more likely, within your scripts. It’s quite easy.

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Tech Republic Security

SEPTEMBER 18, 2020

Looking for an easy to use encryption tool to protect data on your Linux servers? Jack Wallen shows you how to install and use gocryptfs to serve that very purpose.

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Network World

MARCH 4, 2025

There are quite a few tools that can help test your connectivity on the Linux command line. ping statistics 3 packets transmitted, 3 received, 0% packet loss, time 2003ms rtt min/avg/max/mdev = 2.867/4.361/5.859/1.221 ms On Linux systems, the pings will continue until you type^cto stop them. ping 192.168.0.11 ms ^C 192.168.0.11

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Tech Republic Security

AUGUST 13, 2020

Want to hide files and folders from your Linux desktop file manager? Jack Wallen shows you one handy method.

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Tech Republic Security

AUGUST 13, 2021

With Webmin, you can better secure and manage your instances of Rocky Linux. Jack Wallen walks you through the process of getting this web-based tool up and running.

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Tech Republic Security

JANUARY 7, 2021

Jack Wallen shows you an easy way to determine if your Linux server is under a DDoS attack and how to quickly stop it.

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Network World

AUGUST 20, 2024

There are quite a few ways to extract words and substrings from lines of text on a Linux system, replace them with other strings, select delimiters, and even get rid of white space at the beginning and end of lines. set -- 01234567890abcdef $ echo $1 01234567890abcdef Wrap-up Linux provides many commands to help you manipulate text.

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Tech Republic Security

JUNE 30, 2021

Jack Wallen installed 1Password on Linux and found it to be a fantastic solution for password management. Follow his tutorial on how to get this proprietary solution installed on your open source OS.

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Tech Republic Security

FEBRUARY 28, 2020

If your desktop of choice is Linux, you don't have to be without a 2FA tool, thanks to OTPClient.

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Tech Republic Security

NOVEMBER 24, 2020

If you've had files deleted by a hacker or you've accidentally removed them, Jack Wallen shows you how to recover that missing data with a handy tool called testdisk.

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Tech Republic Security

NOVEMBER 3, 2016

For a deep penetrating scan of your Linux servers and desktops, turn to the Lynis auditing tool. Check out how to install and use Lynis.

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Tech Republic Security

FEBRUARY 10, 2023

A new Linux version of Royal ransomware is targeting VMware ESXi virtual machines. Learn more about this security threat and how to protect from it. The post Royal ransomware spreads to Linux and VMware ESXi appeared first on TechRepublic.

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Tech Republic Security

SEPTEMBER 13, 2021

Learn tips on how you can use the Linux openssl command to find critical certificate details. SSL certificates are an integral component in securing data and connectivity to other systems.

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Tech Republic Security

APRIL 8, 2024

Read about a supply chain attack that involves XZ Utils, a data compressor widely used in Linux systems, and learn how to protect from this threat.

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Tech Republic Security

APRIL 7, 2022

If you work on headless Linux servers, you might want to have a command-line password storage tool. Jack Wallen shows you how to use GnuPG and pass for this purpose. The post How to safely store passwords on a Linux server appeared first on TechRepublic.

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Tech Republic Security

NOVEMBER 6, 2020

If you're not sure how to view your SSH certificates, Jack Wallen walks you through the steps on Linux, macOS, and Windows.

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Tech Republic Security

OCTOBER 22, 2020

Adding a user with admin privileges on Linux is easier than you think. Jack Wallen shows you how.

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Tech Republic Security

OCTOBER 2, 2019

Lure possible attackers into a trap with a Kali Linux honeypot.

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Network World

AUGUST 9, 2024

It’s not just knowing how to set up and maintain your servers and understanding how system commands work that makes you a good system administrator. I spent more than 30 years managing Linux servers. Rule 17: Never stop picking up new skills Managing Linux servers can be a very time-consuming and demanding task.

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Tech Republic Security

AUGUST 5, 2021

You'll also learn why disabling the Linux login banner helps make your Linux servers more secure.

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Network World

OCTOBER 19, 2020

Deploying password-quality checking on your Debian-based Linux servers can help ensure that your users assign reasonably secure passwords to their accounts, but the settings themselves can be a bit misleading.

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Tech Republic Security

SEPTEMBER 30, 2021

Jack Wallen shows you how to install this platform on Rocky Linux. If you're looking for one of the best vulnerability scanners on the market, Nessus might be the ticket.

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Network World

JUNE 24, 2024

The Linux find command makes it easy to find files on your system – even if you don’t remember their names or exactly when you last updated them. name TheEnd -delete Wrap-up There really are a lot of very useful options to help you find files on your Linux system – so many, in fact, that it may take a while to digest them all!

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Tech Republic Security

MAY 24, 2021

Looking to eke out as much security as you can from your Linux servers? Jack Wallen shows you how you can limit the information would-be ne'er-do-wells get by disabling the login banner.

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Linux How To Security 388

Tech Republic Security

MARCH 10, 2022

Find out how to mount a remote directory on a Rocky Linux server to a local directory with the help of SSHFS. The post How to use SSHFS to mount remote directories on Rocky Linux appeared first on TechRepublic.

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Network World

JULY 15, 2024

The rm (remove) command is the most obvious way to remove files that you no longer need on your Linux system, and it includes some very useful options. The rm command The rm command simply removes a file and is one of the basic commands that just about every Linux user needs on a routine basis. There are complications, however.

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Tech Republic Security

OCTOBER 16, 2020

If you've had files deleted by a hacker or you've accidentally removed them, Jack Wallen shows you how to recover that missing data with a handy tool called testdisk.

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Tech Republic Security

NOVEMBER 13, 2020

Jack Wallen walks you through the process of putting in place a temporary fix against SAD DNS for your Linux servers and desktops.

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Tech Republic Security

FEBRUARY 15, 2021

To keep your Linux servers and desktops as secure as possible, you should check for (and remove) legacy communication services. Jack Wallen shows you how.

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Tech Republic Security

JANUARY 21, 2021

If you're not sure how to view your SSH certificates, Jack Wallen walks you through the steps on Linux, macOS, and Windows.

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Tech Republic Security

MAY 28, 2020

Protecting your Linux servers against SYN attacks and IP spoofing isn't nearly as hard you think. Jack Wallen shows you how.

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Tech Republic Security

JUNE 25, 2021

If you need to gather information on user logins for your Linux servers, Jack Wallen has just the tool for you.

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