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How to enable LUKS disk encryption with keyfile on Linux

Par : Vivek Gite

We can easily add a key file to LUKS disk encryption on Linux when running the cryptsetup command. A key file is used as the passphrase to unlock an encrypted volume. The passphrase allows Linux users to open encrypted disks utilizing a keyboard or over an ssh-based session. There are different types of key files we can add and enable LUKS disk encryption on Linux as per our needs:

  1. Passphrase keyfile - It is a key file holding a simple passphrase.
  2. Random text keyfile - This is a key file comprising a block of random characters which is much more resistant to dictionary attacks than a simple passphrase-based key file.
  3. Binary keyfile - We can defile an image, video, or any other static binary file as key file for LUKS. It makes it harder to identify as a key file. It would look like a regular image file or video clip to the attacker instead of a random text keyfile.

Let us see how to enable LUKS disk encryption with a key file.

The post How to enable LUKS disk encryption with keyfile on Linux appeared first on nixCraft.

Raspberry Pi Pico released and available at $4 only

Par : Vivek Gite

Raspberry Pi Pico released and available at $4 only
Last year, the Raspberry Foundation also released a brand new version of the Raspberry PI PC (personal computer), and it is directly built into a small-sized keyboard. Now there is more good news for hackers and hardware developers. They just announced their first microcontroller-based product named Raspberry Pi Pico. This small device is priced at only US $4. Unbelievable price. Let us find out about Raspberry Pi Pico hardware specs and software support.

The post Raspberry Pi Pico released and available at $4 only appeared first on nixCraft.

duf – Disk Usage/Free Utility for Linux, BSD, macOS & Windows

Par : Vivek Gite

duf - Disk Usage Free Utility for Linux, BSD, macOS & Windows
We use the df command to show how much disk space is free on mounted file systems in Linux, macOS, and Unix-like systems. We also have the du command to estimate file space usage. We now have another fancy and fantastic looking tool called duf to display statistics on free disk space in Unix, Linux, macOS, *BSD, Android, and Windows written in Golang.

The post duf – Disk Usage/Free Utility for Linux, BSD, macOS & Windows appeared first on nixCraft.

How to unlock LUKS using Dropbear SSH keys remotely in Linux

Par : Vivek Gite


On Linux, we encrypt our partitions and entire disk using Linux Unified Key Setup-on-disk-format (LUKS) for security and privacy reasons. We unlock LUKS protected disk by providing a passphrase at boot time. You need to be in front of your computer or use a remote console to open the encrypted disk under Linux at boot time. However, if your system is in the basement, remote datacenter/office, or upstairs office, you won't able to unlock and boot your Linux box. We can use the Dropbear SSH server for LUKS encrypted Debian or Ubuntu or any other Linux distro via SSH to solve this problem. Let us see how to unlock LUKS using Dropbear SSH keys in Linux at boot time.

The post How to unlock LUKS using Dropbear SSH keys remotely in Linux appeared first on nixCraft.

Significant vulnerabilities that crippled IT world this decade (2010-2020)

Par : Vivek Gite

Significant vulnerabilities that crippled IT world this decade 2010-2020
The last ten years in the computer and IT security world are crippled with so many vulnerabilities. We saw massive cloud computing adoption and end-users using mobile devices with high speed 4G LTE networks. A threat actor may have exploited such weakness in modern computers and networks. Let us look into top vulnerabilities and the attack surface in this decade (2010-2020) that affected Linux/Unix, macOS, IT, cloud-computing, and computers in general.

The post Significant vulnerabilities that crippled IT world this decade (2010-2020) appeared first on nixCraft.

How to write FreeBSD image to USB disk for installation using dd command

Par : Vivek Gite

FreeBSD is an open-source and free Unix-like operating system descended from the Berkeley Software Distribution (BSD). This quick tutorial explains how to download and prepare the USB stick/pen drive to install FreeBSD 12.2 to install FreeBSD using the target computer's USB port.

The post How to write FreeBSD image to USB disk for installation using dd command appeared first on nixCraft.

How to change LUKS disk encryption passphrase in Linux

Par : Vivek Gite

How to change LUKS disk encryption passphrase in Linux
We use encryption to protect mobile devices. For instance, I always use LUKS disk encryption to protect all files stored on my SSD. Dm-crypt (Cryptsetup and LUKS) open-source disk encryption is transparent disk encryption and a great way to keep your data secure. However, changing passphrase is a bit of a challenge for new Linux users and developers. This step-by-step guide explains how to find LUKS slots assigned to you and change your passphrase on a Debian/Ubuntu, CentOS/RHEL, OpenSUSE/SUSE other Linux distros.

The post How to change LUKS disk encryption passphrase in Linux appeared first on nixCraft.

How to restart CentOS or RHEL server safely

Par : Vivek Gite

I use the reboot command to reboot our PostgreSQL server running on RHEL 7. We have a development server running on CentOS 7 too. However, sometimes I noticed database corruption or file issues. Is there is a safe reboot command that will do a graceful reboot for our CentOS or RHEL 7 server without causing any issues? What is the best way to appropriately restart CentOS/RHEL over ssh?

The post How to restart CentOS or RHEL server safely appeared first on nixCraft.

How to configure Intel Wifi on Debian Linux when you get firmware: failed to load iwlwifi-8265-36.ucode error

Par : Vivek Gite

I have an Intel Corporation Wireless/WiFi 8265 / 8275 (rev 78) card. How do I configure this card? I always get an error, "iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-36.ucode". How do I load iwlwifi-8265-36 firmware and enable this driver card on Debian Linux version 10/11 and assign an IP address using DHCP?

The post How to configure Intel Wifi on Debian Linux when you get firmware: failed to load iwlwifi-8265-36.ucode error appeared first on nixCraft.

Top 7 Linux GPU Monitoring and Diagnostic Commands Line Tools

Par : Vivek Gite

nvtop
A video card is a special circuit board that controls what is displayed on a computer monitor. It is also called a graphics processing unit (GPU), which calculates 3D images and graphics for Linux gaming and other usages. Let us see the top 7 Linux GPU monitoring and diagnostic command-line tools to solve issues.

The post Top 7 Linux GPU Monitoring and Diagnostic Commands Line Tools appeared first on nixCraft.

Raspberry Pi 400 Desktop PC: Complete specs and pricing

Par : Vivek Gite

Raspberry Pi 400 Desktop PC
The Raspberry Foundation released a brand new version of the Raspberry PI PC (personal computer), and it is directly built into a small-sized keyboard. The Raspberry Pi 4 model was released in June 2019, and the 8GiB version recently. Let us see Raspberry Pi 400 technical specification and other details.

The post Raspberry Pi 400 Desktop PC: Complete specs and pricing appeared first on nixCraft.

Linux set up bluetooth speaker to stream audio from your Android / iOS mobile phone

Par : Vivek Gite

So how do you stream audio from your Apple iOS or Google Android phone to your laptop speaker? Let us see how to set up a Bluetooth speaker to stream audio from your Android / iOS mobile phone to your Linux based laptop or desktop that got better audio speakers.

The post Linux set up bluetooth speaker to stream audio from your Android / iOS mobile phone appeared first on nixCraft.

bashtop – Awesome Linux resource monitor that shows usage and stats for processor, memory, disks, and network

Par : Vivek Gite

bashtop in action
There is a new kid in town for resource monitoring on Linux called bashtop. As the name suggests, the entire tool coded in the bash script itself that displays usage and stats for CPU, RAD, HDD/SSD, network, and other resources. Let us see how to install and use bashtop, which is an awesome Linux resource monitor. You don't need a Linux desktop to install it. You can also install this app on macOS/FreeBSD provided that you meet software requirements.

The post bashtop – Awesome Linux resource monitor that shows usage and stats for processor, memory, disks, and network appeared first on nixCraft.

10 Linux commands to know the system

Par : Vivek Gite

10 Linux command to know the system
Here are 10 Linux command to know the system and increase your productivity quickly.

The post 10 Linux commands to know the system appeared first on nixCraft.

Linux Slimbook Laptop with AMD Ryzen 4000 released

Par : Vivek Gite

Slimbook
KDE project and Slimbook released a new Linux ultrabook with AMD Ryzen 4000 CPU that comes with eight cores, 16 threads, and a Plasma desktop. Let us look into laptop hardware specifications and other information.

The post Linux Slimbook Laptop with AMD Ryzen 4000 released appeared first on nixCraft.

8GB Raspberry Pi 4 released for $75 – Specifications

Par : Vivek Gite

8GB Raspberry Pi 4 released for USD 75
Back in June 2019, the Raspberry PI 4 model was released, and it was an incredible update over the older model with up to 4GB ram. Today we see the long-rumored 8GB Raspberry Pi 4 released and priced at the just US $75. Here are the complete specs for an updated 64-bit credit card size Raspberry PI 4 8GB model with Linux desktop computer level of performance.

The post 8GB Raspberry Pi 4 released for $75 – Specifications appeared first on nixCraft.

System76 Announces AMD Threadripper Linux Workstations

Par : Vivek Gite

System76 is a Denver, Colorado-based American computer manufacturer. They are specializing in the sale of Linux powered laptops, desktops, and servers. Last year System76 announced two Intel laptops with Coreboot, which as an alternative to proprietary BIOS using Intel 10th Gen CPUs. Now, System76 updated its Linux workstations line and ship with the latest AMD chips for CPU-intensive workloads. But how much of a difference can 64 cores AMD CPU make?

The post System76 Announces AMD Threadripper Linux Workstations appeared first on nixCraft.

Thinkpad update firmware on Linux (X1 extreme/P1 gen2)

Par : Vivek Gite

I have ThinkPad P1 Gen 2 or X1 Extreme 2nd Laptop. Can I easily Install ThinkPad firmware updates on Linux using GUI?

The post Thinkpad update firmware on Linux (X1 extreme/P1 gen2) appeared first on nixCraft.

Dell XPS 13 Developer Edition 2020 Ubuntu Laptop Announced

Par : Vivek Gite

Look like Dell listing to customer feedback. Dell XPS 13 Developer Edition is the ultimate Linux laptop for developers and Linux enthusiasts/power users. The Dell XPS 13 Developer Edition 2020 now supports 10th Gen Intel CPU and 32GB ram. This system comes pre-installed with Ubuntu Linux 18.04, but you can install any other distro.

The post Dell XPS 13 Developer Edition 2020 Ubuntu Laptop Announced appeared first on nixCraft.

Helios64 Arm-Based Linux NAS announced

Par : Vivek Gite

Helios64 is an upgraded version Helios4 of ARM-based NAS SBC (Single-board computer) for Linux. This NAS (Network Attached Storage) comes with 5 SATA 3.0 port, M.2 sata slot, LPDDR 4 ram, and hexacore SoC. Let us see some details about the Helios64 Arm-Based Linux NAS SBC, including pricing and hardware specs information.

The post Helios64 Arm-Based Linux NAS announced appeared first on nixCraft.

Kubuntu Linux Focus Laptop Announced

Par : Vivek Gite

Kubuntu is a free and open-source version based upon Ubuntu Linux. Kubuntu flavor uses KDE instead of GNOME desktop. Now, the Kubuntu project announced the first authorized laptop called Kubuntu Focus in collaboration with MindShareManagement Inc, and Tuxedo Computers. Let us see technical specs and other information.

The post Kubuntu Linux Focus Laptop Announced appeared first on nixCraft.

Linux check the physical health of a USB stick [ Flash drive ]

Par : Vivek Gite

How do I check the physical health of a USB stick in Linux operating systems? How do I check USB flash drive in Linux? Can you tell me Linux command to test and detect bad sector in USB flash memory or pen drives?

The post Linux check the physical health of a USB stick [ Flash drive ] appeared first on nixCraft.

Ubuntu Linux 19.10 released: New Features and Download

Par : Vivek Gite

Ubuntu Linux 19.10 released and will be supported for nine months till July 2020. It is codenamed as Eoan Ermine. The newer release comes with updated Linux kernel 5.3.x, NVIDIA drivers for gaming or AI programming, ZFS on root, OpenStack Train, and more. Let us see what's new in Ubuntu 19.10 and how to upgrade 19.04 to 19.10 using the command-line options.
Ubuntu Linux 19.10 desktop

The post Ubuntu Linux 19.10 released: New Features and Download appeared first on nixCraft.

Modern Linux Laptops with Coreboot Firmware From System76

Par : Vivek Gite

Are you looking for modern Linux laptops with coreboot? The wait is over. Coreboot is a free and open-source software. The coreboot project aimed at replacing the proprietary BIOS firmware and blobs. System76 recently announced two Intel laptops with Coreboot, which as an alternative to proprietary BIOS. These laptops are using Intel 10th Gen CPUs.

The post Modern Linux Laptops with Coreboot Firmware From System76 appeared first on nixCraft.

Dell announces new Linux XPS 13 developer edition 7390 laptop

Par : Vivek Gite

Dell recently announced the new XPS 13 developer edition powered by Ubuntu Linux and Intel's 10th generation Comet Lake CPUs. The new device will soon be available in the US, Canada, and European markets. It is good news for both developers and Linux enthusiast who wants Linux laptop with preloaded Ubuntu operating systems. Let us see new Linux XPS 13 developer edition specs and other information.

The post Dell announces new Linux XPS 13 developer edition 7390 laptop appeared first on nixCraft.

How to install networked HP printer and scanner on Ubuntu Linux

Par : Vivek Gite

I have HP Officejet Pro printer and scanner. How do I install HP Officejet Pro network printers and scanners on Ubuntu Linux? How can I install HP printer on Ubuntu Linux?

The post How to install networked HP printer and scanner on Ubuntu Linux appeared first on nixCraft.

How to check CPU temperature on Ubuntu Linux

Par : Vivek Gite

How do I check CPU temperature in Ubuntu Linux using a command line and GUI tools on my Thinkpad laptop or Desktop computer?

The post How to check CPU temperature on Ubuntu Linux appeared first on nixCraft.

How to check CPU temperature in OpenSUSE Linux

Par : Vivek Gite

How do I check CPU temperature in OpenSUSE Linux using a command line and GUI tools on my Thinkpad laptop?

The post How to check CPU temperature in OpenSUSE Linux appeared first on nixCraft.

Raspberry PI 4 Released – Complete specs and pricing

Par : Vivek Gite

A new version of the Raspberry PI 4 model has been released, and it is incredible update over the older model. A few years ago, I got Raspberry Pi 3 . It was my first 64-bit ARM board. It came with a 64-bit CPU. Here are the complete specs for an updated 64-bit credit card size Raspberry PI 4 desktop computer level of performance.

The post Raspberry PI 4 Released – Complete specs and pricing appeared first on nixCraft.

How to determine number of CPUs on Linux using command line

Par : Vivek Gite

I am a new Linux system admin. How do I obtain the number of CPUs and cores in the Linux system from the command line? How do I determine the number of CPUs on Linux?

The post How to determine number of CPUs on Linux using command line appeared first on nixCraft.

How to check hard drive health on FreeBSD

Par : Vivek Gite

How do I read my hard disk/SSD health using smartctl command on FreeBSD operating system? How can I hard drive health on FreeBSD and find out if my disk is dying?

The post How to check hard drive health on FreeBSD appeared first on nixCraft.

Helios4 Arm-Based Open Source NAS SBC For Linux/FreeBSD

Par : Vivek Gite

Helios4 is ARM-based open source NAS SBC (Single-board computer) for Linux. This NAS (Network Attached Storage) comes with 4 SATA 3.0 port and comes with ECC memory. Let us see some details about the Helios4 Arm-Based Open Source NAS SBC and ongoing Kickstarter camping.

The post Helios4 Arm-Based Open Source NAS SBC For Linux/FreeBSD appeared first on nixCraft.

How to find Intel NUC BIOS version and model on Linux

Par : Vivek Gite

I installed Linux on Intel NUC. I need to find Intel NUC BIOS version. How do I find out BIOS version, date, and model name of my Intel NUC using Linux command-line options?

The post How to find Intel NUC BIOS version and model on Linux appeared first on nixCraft.

How to install networked HP printer and scanner on Fedora Linux

Par : Vivek Gite

I have HP Officejet Pro printer and scanner. How do I install HP Officejet Pro network printers and scanners on Fedora Linux? How can I install HP printer on Fedora Linux? How do I add a HP network printer on Fedora Linux?

The post How to install networked HP printer and scanner on Fedora Linux appeared first on nixCraft.

How do I know if my Linux is 32 bit or 64 bit?

Par : Vivek Gite

I need to find out if my Linux server is running on 32-bit or 64-bit system. How do I know if my Linux is 32 bit or 64 bit?

The post How do I know if my Linux is 32 bit or 64 bit? appeared first on nixCraft.

How to check RAID configuration in Linux

Par : Vivek Gite

I need to check RAID configuration in Linux. How do you check your current software RAID configuration in a Linux-based server powered by RHEL/CentOS or Debian/Ubuntu Linux?

The post How to check RAID configuration in Linux appeared first on nixCraft.

How to install Nvidia driver on CentOS 7 Linux

Par : Vivek Gite

I am a new CentOS 7 Linux desktop user. I need to use Nvidia software for my video editing software and other purposes. How do I install the Nvidia driver on CentOS 7 Linux?

The post How to install Nvidia driver on CentOS 7 Linux appeared first on nixCraft.

Raspberry $25 Pi 3 Model A+ Released – Complete specs and pricing

Par : Vivek Gite

The Raspberry Pi is a small single-board computer (SBC) developed by the Raspberry Pi Foundation. It supposes to promote the teaching of computer science, programming for kids and in developing countries. The new Raspberry Pi 3 Model A+ comes with 1.4GHz clock speed, 5GHz wireless networking and improved thermals of Raspberry Pi 3B+ in a smaller form factor. It costs $25.

The post Raspberry $25 Pi 3 Model A+ Released – Complete specs and pricing appeared first on nixCraft.

Open Source Linux Powered System76 Thelio Desktops Is Here

Par : Vivek Gite

Thelio Linux Desktop
The top 500 most powerful supercomputers on the planet run Linux operating system. Linux has a 100% market share of those machines and a large share of cloud computing, VMs, and bare metal market too. Obviously, developers and people who care about their privacy need Linux pre-installed so that they can get back to work ASAP. System76 released new desktop systems with Linux pre installed. The Thelio desktops computer available with both AMD and Intel CPU. AMD is more user-friendly to the Linux and provides a better price-performance ratio.

The post Open Source Linux Powered System76 Thelio Desktops Is Here appeared first on nixCraft.

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