I was a Bitcoin fan before it was popular. That means I had thousands of Bitcoins. It also means I sold my thousands of Bitcoins for less than $1 each. Still, the technology fascinates me, and although cryptocurrencies have risen and fallen, I'm still a fan. more>>
Engineers love to think that they make decisions based on pure logic and merit. But of course, everyone has biases in terms of programming languages, editors and other technologies—biases that probably can be defended in technical terms, but that often come down to an emotional argument as much as a technical one. more>> […]
Following on its resounding success with its Sidekiq MiniPCIe card, wireless communications systems specialist Epiq Solutions recently added the Sidekiq M.2 state-of-the-art, small form-factor, software-defined radio (SDR) card. more>>
Although most music lovers stream or download music today, the stubborn pre-millennials among us have legacy CD collections at home. This demographic is the perfect target group for Nativ Disc, a bit-perfect CD Ripper that allows users to import up to 12,000 CDs—in lossless FLAC, uncompressed WAV or lossy MP3 format—into their Nativ Vita high-resolution musi […]
This article focuses on flaws in Android's stock web libraries, while acknowledging related exploits. Some modern Android browsers have critically weak encryption and other dangerous flaws that cannot be patched or otherwise corrected. This weakness extends to multiple browsers and applications and is determined by the linkage to the system webcore on o […]
A project I'm involved with has made me think about how there are always many solution paths for any given problem in the Linux universe. For this other project, I wanted to cobble together a version of grep that let me specify proper regular expressions without having to worry about the -E flag and get a context for the matches too. more>> […]
The "5" in Naztech's new Roadstar 5 Car Charger refers to the abundant five ports offered by the device, intended to end in-vehicle debates on who gets to charge their device next. Naztech says that its new charger delivers superior charging power and speed while protecting tablet and smartphone batteries and motherboards. more>> […]
Before upgrading my virtual machine, I would like to make a snapshot. I want to revert a domain/VM to a snapshot if something goes wrong with my upgrade. Is there a command to create a snapshot of virtual machine (VM) while it is running? Does qemu-kvm support live snapshot creation?
I am a regular Linux system user. In Linux (especially CentOS), I am used to applying updates a few times a week using yum command, but how do I do that on my OpenBSD severer? How do I apply updates on OpenBSD operating system?
My Linux shell user can modify their password using the passwd command. How can I force users to choose the secure password that will prevent users from using stupid passwords like "abc123", "password", "123456" and so on? How do I setup password quality requirements on my Debian or Ubuntu Linux server?
Kernel-based Virtual Machine (KVM) is a virtualization module for the Linux kernel that turns it into a hypervisor. How can I install KVM with bridged networking, setup guest operating system as the back-end virtualization technology for non-graphic Ubuntu Linux 16.04 LTS server?
How do I configure Postfix MTA to send eMail using an external cloud-based SMTP server (with username: password) from a web server on Linux or Unix-like system? How do I configure an Ubuntu server and postfix as the relay server (smarthost)?
I am getting the following error in my cron job log file /var/log/cron.log: Aug 22 01:59:01 server2 cron: Error: bad username; while reading /etc/cron.d/backups I have job entry as follows to run a job at 00:50 every day for root user: 50 0 * * * /etc/cron.d/backups How do I fix this problem on Linux or Unix-like system?
I am a new sysadmin and CentOS user. My system is configured to use DHCP. How can I switch from DHCP to static IP address configuration in a CentOS 7 desktop system? How do I setup a static TCP/IP address on my CentOS Linux 7 or Red Hat Enterprise Linux 7 server using command line option?