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today's howtos

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HowTos
  • Learn IP Command to Manage Networking on Linux

    IP (Internet Protocol) command is used to manage, view network configuration on a Linux system. The command ‘IP’ and its uses are same in all the Linux family – Fedora, Debian, Ubuntu,Red Hat, CentOS and Arch Linux etc. It is the command-line utility that is part of iproute2 package installed in kernel.

    This article is going to demonstrate usage of IP command and how IP command is used to manage networking on Linux system

  • How to get Battery status notification when a battery is full or low

    Linux laptops are good for Nix users, but it often drains the battery.

    I tried many Linux operating systems, but did not have a long battery life like Windows.

    Charging a battery for a longer duration will damage your battery, so unplug the power cable when it is 100% charged.

    There is no default application to notify when the battery charged or discharged, and you need to install a third-party application to notify you.

    For this, I usually install the Battery Monitor app, but it was deprecated, so I created a shell script to get the notification.

    Laptop battery charging and discharging status can be identified using the following two commands.

  • How To Find Currently Logged In Users In Linux - OSTechNix

    A Linux system admin should keep an eye on who is currently logged into the Linux system and what are they up to. We already knew how to find the last logged in users in Linux. How would you identify who is logged on your Linux system at the moment and what they are doing? Easy! This tutorial lists various methods to find currently logged in users in Linux.

  • How to install Linux Mint 20.1 - YouTube

    In this video, I am going to show how to install Linux Mint 20.1.

  • Rescue Your PC With Linux Live CD

    Most Linux distros provide an ISO file you can use to create a Live CD/USB. With this Linux Live CD, you can boot to the OS from your USB drive, test it out and install it if you like. However, do you know that the Live CD can also be used to rescue your PC when it is down? In fact, it is such a useful tool that I would advise you to keep a copy on hand at all times.

  • Setup a Local Web Server on Windows, Mac, and Linux

    When developing a website, a web designer needs to be able to see his webpages in the same way the end user would. Sometimes simply clicking on and viewing your HTML files in the web browser is enough, but if you want to test dynamic content, you will need to set up a local web server. Doing this is quite simple and can easily be accomplished on Windows, macOS, and Linux. There are many types of web servers available, but we use Apache in this tutorial, as it is the most common server around, very easy to set up, and compatible with all major operating systems.

  • How to Install Different PHP (5.6, 7.0 and 7.1) Versions in Ubuntu

    PHP (recursive acronym for PHP: Hypertext Preprocessor) is an open-source, popular general-purpose scripting language that is widely-used and best suited for developing websites and web-based applications. It is a server-side scripting language that can be embedded in HTML.

    Currently, there are three supported versions of PHP, i.e PHP 5.6, 7.0, and 8.0. Meaning PHP 5.3, 5.4, and 5.5 have all reached the end of life; they are no longer supported with security updates.

  • How to Manage Internet provider Company with Odoo

    In this article we are going to see how to manage your internet provider company with Odoo. Why choose Odoo ERP for your internet provider business? Odoo is a web-based business management software. Enterprise Resource Planning, prominently called ERP is considered as the backbone of any business organization for successful business management.

    Internet the world which changes the functioning history of the world. It’s the modernization tool which has provided us with connectivity, communication, information sharing and gathering. People can’t imagine a day without the internet in this era as they have paved the way for online conversions, Wikipedia, banking and many more. Moreover, there is no industry or institution which does not have access to internet facilities.

  • How To Install Wireshark 3.4.2 On Ubuntu / LinuxMint | Tips On UNIX

    Wireshark an open-source protocol analyzer software mainly used to monitor the traffic in a network, analysis, and development.

    Wireshark got its new interface in the version 2.0 series and it is written in QT5 and the latest version of Wireshark is 3.4.2 with new and updated features with no new protocols in this release.

    This tutorial will be helpful for beginners to install Wireshark 3.4.2 on Ubuntu 20.04, Ubuntu 20.10, Ubuntu 18.04, and LinuxMint 20.1

  • How To Encrypt Partition on Linux – devconnected

    In one of our previous articles, we learnt how you can encrypt your entire root filesystem on Linux easily.

    However, in some cases, you may want to encrypt one simple partition that may store some of your important files.

    As you already know, encrypting your disks is crucial. If your laptop were to be stolen, you would probably lose all your personal information.

    However, there are some ways for you to cope with this problem : by encrypting your disk partitions.

    In this tutorial, you will learn about all the steps necessary to encrypt an entire disk partition, secure it with a passphrase or with a keyfile.

    For the example, the article will be illustrated on a RHEL 8 operating system, but there should not be any differences if you use another one.

  • How To Install Nmap on CentOS 8 - idroot

    In this tutorial, we will show you how to install Nmap on CentOS 8. For those of you who didn’t know, Nmap “Network Mapper” is a utility for network exploration or security auditing. It is one of the essential tools used by network administrators to troubleshooting network connectivity issues and port scanning. Most Unix and Windows platforms are supported in both GUI and command line modes.

    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 install of the Nmap security scanner on CentOS 8.

  • How to Install gThumb 3.11.2 in Ubuntu 20.04, Ubuntu 20.10 | UbuntuHandbook

    Gnome photo manager and image viewer gThumb 3.11.2 was released a few days ago. Here’s how to install it in Ubuntu 20.04, Ubuntu 20.10, Linux Mint 20, Pop!_OS 20.04 via PPA.

  • How to record your Linux terminal using asciinema | Enable Sysadmin

    Asciinema might be the application you've been looking for to demonstrate a skill or process that you want your colleagues or students to learn on-demand.

  • 5 advanced rsync tips for Linux sysadmins | Enable Sysadmin

    In a previous article entitled Sysadmin tools: Using rsync to manage backup, restore, and file synchronization, I discussed cp and sftp, and looked at the basics of rsync for moving files around. There are also a couple of other great articles here on Enable Sysadmin on tar and SSH you should take a look at. Copying files to and from remote systems and having an easy way to run a backup of something you're working on (or, for that matter, critical company data) are basic, useful tools in the sysadmin toolbox that I use again and again. Sometimes, however, you may want to do something a little more sophisticated, like move data across a less trusted or slower link. Rsync can provide encryption to protect it in transit, compression to make it flow better, and checksums to ensure you get what you were expecting.

  • How to Create a file in Ubuntu Linux using command & GUI - Linux Shout

    Creating files on Linux is not a cumbersome task, however those who are new to it or just shifting from Windows to Ubuntu like systems, they may face some problem to create files using command line especially.

    Well, even on Linux anybody can create files and folders using a graphical user interface that works just like a charm. Simply right-click and select the New folder or New Document for text files. However, this is not true with every Linux system. For example on Ubuntu right-clicking will give you the only option to create a new folder, thus when it comes to creating a text using GUI you will get stuck.

  • How to Install Arduino IDE on Linux Mint 20

    The Arduino IDE software is an integrated development environment for Arduino that includes a text editor for writing code and a compiler for compiling the code for uploading to your Arduino. The Arduino IDE is supported on many operating systems, and the Linux system is no exception. Many Linux users worldwide can use this tutorial to use the Arduino IDE environment for their embedded experiments. It is available for 32-bit and 64-bit operating systems. In this tutorial, we will use Linux Mint 20 to install Arduino. Even if you do not have this latest version of Linux Mint, you can still apply these steps to your systems.

  • How to Install the latest PHP 8.0 on Ubuntu 20.04 /18.04

    PHP stands for Hypertext Preprocessor. It is one of the oldest server-side programming languages used to create Dynamic and Responsive Web-App.

    The most popular CMS and frameworks like WordPress, Magento, Joomla, Drupal, and Laravel are written in PHP Language.

  • How to install Virtualmin on Ubuntu 20.04 for a cPanel/CentOS-like web hosting control panel - TechRepublic

    For many, Red Hat pulling support from the standard CentOS releases had some serious side effects. One of the biggest dominoes to fall was cPanel--for many web hosting companies, cPanel is the de facto standard control panel. It offers absolutely everything necessary to manage the hosting of your every client's needs.

    Once Red Hat pulled the plug on CentOS 8, cPanel announced they wouldn't be supporting CentOS Stream. The good news is that the company is accelerating their efforts to support Ubuntu Server LTS, and should have that ready to ship by late 2021.

    For those looking to either migrate away from CentOS or are looking for something that can be used on the Ubuntu platform for now (or for good), there's always Virtualmin.

More in Tux Machines

Proprietary Software and Digital Restrictions (DRM)

  • GitHub still won’t explain if it fired someone for saying ‘Nazi,’ and employees are pissed

    The current conflict began the day of the riots in Washington, DC when a Jewish employee told co-workers: “stay safe homies, nazis are about.” Some colleagues took offense to the language, although neo-Nazi organizations were, in fact, present at the riots. One engineer responded: “This is untasteful conduct for workplace [in my opinion], people have the right to protest period.”

  • Amazon Web Services opens first office in Greece

    It said services covered areas from big data analytics and mobile, web and social media applications to enterprise business applications and the internet of things.

  • Critical Microsoft Defender Bug Actively Exploited; Patch Tuesday Offers 83 Fixes

    Researchers believe the vulnerability, tracked as CVE-2021-1647, has been exploited for the past three months and was leveraged by hackers as part of the massive SolarWinds attack. Last month, Microsoft said state-sponsored hackers had compromised its internal network and leveraged additional Microsoft products to conduct further attacks.

    Affected versions of Microsoft Malware Protection Engine range from 1.1.17600.5 to 1.1.17700.4 running on Windows 10, Windows 7 and 2004 Windows Server, according to the security bulletin.

  • Making Clouds Rain :: Remote Code Execution in Microsoft Office 365

    TL;DR; This post is a story on how I found and exploited CVE-2020-168751, a remote code execution vulnerability in Exchange Online and bypassed two different patches for the vulnerability. Exchange Online is part of the Office 365 suite that impacted multiple cloud servers operated by Microsoft that could have resulted in the access to millions of corporate email accounts.

  • Dropbox lays off 11% of its workforce as COO departs

    Dropbox in November provided revenue guidance of $497 million to $499 million for the fourth quarter. The company said at the time that it’s aiming to achieve margins of 28% to 30% in the long term.

  • Technical Error 'Saw 150,000 U.K. Police Records Wiped' From Databases

    Police have been asked to assess if there is a threat to public safety after it was revealed that thousands of police records were deleted in error, including data on fingerprints, DNA, and arrest histories.

    The error, first reported in the Times, saw 150,000 files lost, with fears it could mean offenders go free. A coding error is thought to have caused the earmarking of the files for deletion.

    The U.K. Home Office said the lost entries related to people who were arrested and then released without further action and no records of criminal or dangerous people had been deleted. Home secretary Priti Patel is now under pressure to explain the mistake, which the opposition Labour party said "presents huge dangers" for public safety.

  • January 2021 Linux Foundation Newsletter: Bootcamp Sale, SolarWinds Orion, New Kubernetes & WebAssembly Classes, LFX Webinar Series
  • How I hijacked the top-level domain of a sovereign state

    Note: This issue has been resolved and the .cd ccTLD no longer sends NS delegations to the compromised domain.

    TL;DR: Imagine what could happen if the country-code top-level domain (ccTLD) of a sovereign state fell into the wrong hands. Here’s how I (@Almroot) bought the domain name used in the NS delegations for the ccTLD of the Democratic Republic of Congo (.cd) and temporarily took over 50% of all DNS traffic for the TLD that could have been exploited for MITM or other abuse.

  • Apple begins blocking M1 Mac users from side loading iPhone and iPad applications

    As a refresher, Apple Silicon Macs allow users to run iOS and iPad applications on their Mac, but developers can opt out of allowing their apps to be installed on the Mac. This is the path that many developers have taken, making the necessary change in App Store Connect to remove their app from the Mac App Store.

    But with that being said, until today, you could manually install iOS apps like Netflix, Instagram, and Facebook on an M1 Mac by using their respective IPA files downloaded under a valid Apple ID. Many people were using tools such as iMazing to complete this process.

    9to5Mac has now confirmed that, starting today, this is no longer possible unless the application is available on the Mac App Store. Apple has flipped the necessary sever-side switch to block iPhone and iPad applications from being installed on Apple Silicon Macs.

  • Apple is blocking Apple Silicon Mac users from sideloading iPhone apps

    Apple has turned off users’ ability to unofficially install iOS apps onto their M1 Macs (via 9to5Mac). While iOS apps are still available in the Mac App Store, many apps, such as Dark Sky and Netflix, don’t have their developer’s approval to be run on macOS. Up until now, there was a workaround that allowed the use of third-party software to install the apps without having to use the Mac App Store, but it seems like Apple has remotely disabled it.

    When we tried to install an unsupported app on an M1 Mac running macOS 11.1, we got an error message saying that we couldn’t install it and should “try again later”. You can see a screenshot at the top of this article.

  • Apple TV Plus Free Subscriptions Extended Again, This Time Through July 2021

    The tech giant is extending the free-access period for Apple TV Plus customers who have signed up through its 12-month free subscription offer through July 2021. That’s after it had previously pushed that gratis period to February. So if you were among the first to take the one-year-free deal back in November 2019, that’s turned into 21 months free of Apple TV Plus.

  • Spotify Enters Settlement Talks With PRO Music Rights Founder Jake P. Noch

    But a new legal filing, shared with DMN this afternoon, reveals that Spotify and Noch have officially entered settlement talks. The involved parties “jointly” moved for a 60-day stay, “including discovery and all deadlines,” so that they can “attempt to negotiate a resolution of this matter,” the three-page-long document (dated January 13th, 2021) indicates.

    Furthermore, the filing specifies that Sosa Entertainment, Jake P. Noch, and Spotify “have recently made progress towards a potential resolution of the litigation.” The joint motion doesn’t elaborate upon the terms of this possible agreement – though Noch said in a statement that he’s eager to begin working towards an “excellent resolution” in earnest.

  • The FSF fights for your right to repair

    It is this example of automated vehicles that served as inspiration for the FSF's animated video Fight to Repair.

    However, any technology we use could potentially be co-opted by the proprietary, DRM-controlled subscription model Tesla and the tractor manufacturers are proposing. Imagine your "smart home" having a broken lock, or worse, being broken into, and not having the control, or the simple right to repair the bug. Countless other examples can be found showing us that the key to a free future is the right to repair. We need to fight for a future in which the software used is free in order to maintain ownership and control not only over our technology, but over our lives.

Debian Developers: Christian Kastner, Junichi Uekawa, and Michael Prokop

  • Christian Kastner: Keeping your Workstation Silent

    I've tried numerous coolers in the past, some of monstrous proportions (always thinking that more mass must be better, and reputable brands are equally good), but I was never really satisfied; hence, I was doubtful that trying yet another cooler would make a difference. I'm glad I tried the Noctua NH-D15 anyway. With some tweaking to the fan profile in the BIOS, it's totally inaudible at normal to medium workloads, and just a very gentle hum at full load—subtle enough to disappear in the background. For the past decade, I've also regularly purchased sound-proofed cases, but this habit appears anachronistic now. Years ago, sound-proofed cases helped contain the noise of a few HDDs. However, all of my boxes now contain NVMe drives (which, to me, are the biggest improvement to computing since CPUs going multi-core). On the other hand, some of my boxes now contain powerful GPUs used for GPGPU computing, and with the recent higher-end Nvidia and AMD cards all pulling in over 300W, there is a lot of heat to manage. The best way to quickly dump heat is with good airflow. Sound-proofing works against that. Its insulation restricts airflow, which ultimately causes even more noise, as the GPU's fans need to spin at very high RPMs. This is, of course, totally obvious in hindsight.

  • Junichi Uekawa: It's been 20 years since I became a Debian Developer.

    It's been 20 years since I became a Debian Developer. Lots of fun things happened, and I think fondly of the team. I am no longer active for the past 10 years due to family reasons, and it's surprising that I have been inactive for that long. I still use Debian, and I still participate in the local Debian meetings.

  • Michael Prokop: Revisiting 2020

    Mainly to recall what happened last year and to give thoughts and plan for the upcoming year(s) I’m once again revisiting my previous year (previous editions: 2019, 2018, 2017, 2016, 2015, 2014, 2013 + 2012). Due to the Coronavirus disease (COVID-19) pandemic, 2020 was special™ for several reasons, but overall I consider myself and my family privileged and am very grateful for that. In terms of IT events, I planned to attend Grazer Linuxdays and DebConf in Haifa/Israel. Sadly Grazer Linuxdays didn’t take place at all, and DebConf took place online instead (which I didn’t really participate in for several reasons). I took part in the well organized DENOG12 + ATNOG 2020/1 online meetings. I still organize our monthly Security Treff Graz (STG) meetups, and for half of the year, those meetings took place online (which worked OK-ish overall IMO). Only at the beginning of 2020, I managed to play Badminton (still playing in the highest available training class (in german: “Kader”) at the University of Graz / Universitäts-Sportinstitut, USI). For the rest of the year – except for ~2 weeks in October or so – the sessions couldn’t occur. Plenty of concerts I planned to attend were cancelled for obvious reasons, including the ones I would have played myself. But I managed to attend Jazz Redoute 2020 – Dom im Berg, Martin Grubinger in Musikverein Graz and Emiliano Sampaio’s Mega Mereneu Project at WIST Moserhofgasse (all before the corona situation kicked in). The concert from Tonč Feinig & RTV Slovenia Big Band occurred under strict regulations in Summer. At the beginning of 2020, I also visited Literaturshow “Roboter mit Senf” at Literaturhaus Graz.

Games: Familiars.io, Valve and Godot

  • Familiars.io is a MMO monster catching game where the creatures have permadeath

    Well this is quite unusual. You've played monster catching games before but not like this. Familiars.io put a fresh spin on it all and it's quite ingenious. Developed as a pixel-art retro-looking browser game, it's super accessible since you can play it on pretty much anything that can run some simple graphics in a browser window. It's an MMO too, so you can join up with others and chill out. When you want to, go off and catch some monsters, engage is some PvP and perhaps find a new favourite game waiting for you.

  • What we expect to come from Valve to help Linux gaming in 2021 | GamingOnLinux

    By now you've probably heard either through us in our previous article or elsewhere that Valve are cooking something up to help Linux gaming even further. We have an idea on what one part of it is. Valve already do quite a lot. There's the Steam Play Proton compatibility layer, the new container runtime feature to have Linux games both natively supported and Windows games in Proton run through a contained system to ensure compatibility, their work on Mesa drivers and much more. In Valve's review of Steam in 2020 that we covered in the link above, one thing caught our eye and has been gaining attention. Valve mentioned for 2021 they will be "putting together new ways for prospective users to get into Linux gaming and experience these improvements" so what exactly does that mean? Well, a big part of that might have already been suggested directly.

  • Godot Engine - Dev snapshot: Godot 3.2.4 beta 6

    While our main focus stays on the 4.0 branch, the current stable 3.2 branch is receiving a lot of great improvements, and the upcoming 3.2.4 release is going to be packed with many new features.

Zeroshell 3.9.5 Released

Zeroshell 3.9.5 is ready. In this release TLS 1.0 has been disabled and TLS 1.2 enabled for HTTPS. This improves security and compatibility with new browser releases. Read more