today's howtos

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Using DNSSEC with (Free) IP
The DNS infrastructure contains a growing number of critical information such as services records pointing to authentication services, TLSA records, SSH fingerprints and the like. DNSSEC signs this information, the client can trust the information DNS sends. It protects against forged information through cache poisoning. This article shows how to achieve a DNSSEC protected DNS environment with the help of FreeIPA
This article was taking some time to write as I wanted to see how it behaves in the long term. The initial setup was done in early January 2018. The lab setup is made with RHEL7.4 using stock IPA 4.5.0. and later upgraded subsequently to RHEL 7.9 with IPA 4.6.8. So my test setup was running for a long time before I decided to publish this article.
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How To Install Rocket.Chat on Ubuntu 20.04 LTS - idroot
In this tutorial, we will show you how to install Rocket.Chat on Ubuntu 20.04 LTS. For those of you who didn’t know, Rocket.Chat is one of the most popular open-source chat software. A fantastic alternate to both Slack and compensated live chat software. It’s free, what is unlimited and it’s a bunch of cool features like Video chat, Screen sharing, Mobile apps, and more.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step by step installation of Rocket.Chat open-source chat software on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian based distribution like Linux Mint.
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How To Find Last Logged In Users In Linux - OSTechNix
In this tutorial, we will see how to find last logged in users in Linux using last, lastb and lastlog commands with examples.
As a Linux system administrator, you should routinely check the login date and time of the users in your Linux server. It gives you some useful details such as how many users are active, how many users are inactive and when do they log in and for how long etc. If some user accounts haven't been used for a long time, you can simply lock them if they are no longer needed. You can also use the last login dates when auditing your Linux servers and investigate which user could have caused the problem. Fortunately, the GNU/Linux operating system includes the triplet commands namely last, lastb and lastlog to display the recent users' login dates.
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Download and install CentOS 7 Server Minimal ISO on PC or virtualbox
On one hand, where CentOS 8 Linux will stop getting further updates in December of this year, CentOS 7 Linux still has a long time to reach the end of its life that is stipulated in 2024. Thus, if you want to start with this server Linux distro then still you have enough time, and here will let you know how to install CentOS 7 minimal version on Server, PC, or VirtualBox.
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7 Bash tutorials to enhance your command line skills in 2021 | Opensource.com
Bash is the default command line shell on most Linux systems. So why not learn how to get the most out of it? This year, Opensource.com featured many great articles to help you leverage the power of the Bash shell. These are some of the most-read articles about Bash:
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USB Audio on a Boombox - https://purpleidea.com/
I decided I should get a small portable boombox to practice my dope dance moves. I currently still suck because I think I spend more time computering than out on the floor. In any case, in a stroke of luck, I happened upon a used boombox that was getting discarded due to a broken CD player. Nobody seemed either able or interested in getting USB audio working, so I took it home and gave it a go!
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Maxim Burgerhout: Shut up, auditd!
On my tiny, Raspberry Pi based Fedora systems, I have a lot of audit messages in my journal. And I mean a lot, I mean like over 50,000 over the course of 9 days. That’s over 5,500 per day. Or, to put it plainly: too many.1
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The 7 most used Linux namespaces | Enable Sysadmin
Check out this brief overview of what the seven most used Linux namespaces are.
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digiKam 7.7.0 is released
After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release.
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Dilution and Misuse of the "Linux" Brand
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Samsung, Red Hat to Work on Linux Drivers for Future Tech
The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world.
Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility.
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