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How To Ignore SSL Warnings in curl
Making curl ignore SSL warnings Sometimes your testing scenario or cycle is so far ahead of your infrastructure that you don't even have time or opportunity to procure proper SSL certificates for you...
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Linux Kernel 5.5
Linux Kernel 5.5 Yesterday Linux Kernel 5.5 was released, almost exactly 2 months since the Linux Kernel 5.4. Here's what I find interesting in this release: improved Raspberry Pi 4 support – that's...
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Uninstalling minikube
Deleting minikube Don't remember how, but I ended up with two Kubernetes installs on my mcfly desktop with macOS: the one that came with Docker Desktop for macOS and the minikube variety that I must...
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Kali Linux 2020.1
Kali Linux 2020.1 This time I'm definitely installing it on my Raspberry Pi 4! Kali Linux just released the very first release of the year 2020 with the following much welcome improvements: Single...
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How To Extract XZ Files
XZ archives can be unpacked using XZ utils I've come across XZ files more than once, most recently when downloading Kali Linux. It should be a fairly common knowledge now, but some operating systems...
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Show Files Installed by a Debian/Ubuntu Package
List files in a Debian/Ubuntu package with dpkg-query Sometimes it's not enough to know that a certain package is installed on your Linux system. You want to know the full list of files installed by...
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Unix Tutorial Digest – February 2nd, 2020
Unix Tutorial Digest – January 2020 For those staying up late to watch Super Bowl LIV and those just looking for a few interesting links, here's the monthly summary of Unix/Linux news and Unix...
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shutdown vs halt
shutdown vs halt Getting the difference between shutting a Unix system down versus halting it is kind of important. Graceful shutdown It's important that your Unix/Linux system completes startup or...
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Failed Login Attempts for root User
Failed login attempts Wow, things are much worse than I expected! I'm reinstalling one of the dedicated hosts for Tech Stack. Kicked off the reinstall with CentOS 8 and came back a few hours later, to...
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Secure Keyboard Input in bash Scripts
Secure keyboard input in bash I needed to create a very simple bash script that required a password to be provided using keyboard and then used further in the script. Turns out, there's just a way to...
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Run Ansible Tasks for Specific OS Release Version
Red Hat Ansible I already know and have explained how easy it is to make an Ansible task run only on a specific Linux distro family (Debian/Ubuntu or RedHat/Centos), but recently needed to go even...
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Resume Downloads with curl
Resuming downloads with curl If you're on an unstable WiFi hotspot or simply forgot about a curl download and shut down your laptop, there's a really cool thing to try: resume download from where you...
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Host Key Verification Failed
Host key verification failed When reinstalling servers with new versions of operating system or simply reprovisioning VMs under the same hostname, you eventually get this Host Key Verification Failed...
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Project: Password Protect a Website with nginx
nginx logo I needed to keep a few older websites online for a short little while, but didn't want to leave them wide open in case older CMS systems were vulnerable – so I decided to protect them with...
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Systemd Startup Times with systemd-analyze
systemd-analyze Systemd had the goal of optimising startup times from the very beginning. It is therefore no particular wonder that it has a tool for precise startup timing and analysis:...
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Debian 10.3 Released
Debian Linux Pretty cool! I almost missed that Debian 10.3 got released last week. This is a corrective release, meaning it's about improving stability and security rather than about introducing major...
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Basic Kubernetes Cluster with 2 VMs
I'm researching for my next Unix Tutorial Project, so today I'm spinning up two new Ubuntu 19.10 VMs and configuring them as Kubernetes Master and Kubernetes Node, accessible from my macOS desktop....
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SSH Reference Mindmap
I haven't shared this on Unix Tutorial before, but I'm a huge fan of mindmaps. I create and use them all the time for any process or knowledge that I am working with. It seems to me that all the Unix...
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Use visudo to Check SUDO Config Syntax
syntax check with visudo -c I'm working on a longer post about editing sudoers with visudo or editing /etc/sudoers directly (you should avoid this if possible), but for now here's just a quick note on...
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Tower 4.0 for Mac
Tower 4.0 is out! Great news! Tower (I still keep calling it Git Tower) released version 4.0 recently, with a number of bug fixes and a great new feature. I'm not a software developer, but find myself...
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