Networking, system administration and more
Networking, system administration and more
systemd can provide a service named resolved to handle DNS resolution. This service can handle DNS over TLS, DNSSEC validation, DNS caching, Multicast DNS resolution and more. Depending on the Linux distribution, resolved may be used by default. On these systems there should be a symlink from /etc/resolv.conf to a […]
Read moreI needed to run some simple tasks from a PowerShell session on a remote Windows computer. I thought this would be no problem – just fire up the PowerShell container that Microsoft provides and start a remote session but of course it is never that easy. I will be using […]
Read moreWhile updating some servers I ran into an issue when updating the available packages. These servers are using the third party repository packages.sury.org to get alternative PHP releases. The error was: Some sources suggested replacing the GPG key in /etc/apt/trusted.gpg.d/php.gpg: [SOLVED] The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic […]
Read moreChoosing a specific cipher to use for SSH can have a large performance impact when transferring files using tools that use SSH as a transport. For testing, I decided to benchmark the impact of using scp with various ciphers locally on my laptop as well as a VPS from Linode. […]
Read moreAfter ugrading Kubuntu 20.10 (Groovy) to 21.04 (Hirsute), I started getting the following error when trying to build any Docker containers: Various Googling pointed to the result; simply installing the gnome-keyring package resolved the problem: After doing that everything worked as expected. EDIT: After using the OS some more, I […]
Read moreThe wp-cron.php script for WordPress handles various scheduled events (such as checking for updates, publishing scheduled posts and more). By default this will be executed at each page load (to check if anything needs to be done). A common recommendation is to disable this and instead run it as a […]
Read moreAt the time of writing, the Linode Longview agent is not working with MariaDB 10.5 onwards. This happens because there is a hard coded binary name in the Perl script responsible for determining if MySQL monitoring is required; from MariaDB 10.5 the binary name has changed from mysqld to mariadbd. […]
Read moreFor convenience I like to name the interfaces for my desktop/laptop in an easy to remember convention so that I don’t need to think about what the interface names are at all when running things like tcpdump. The best way I have found to do this is with udev rules. […]
Read moreThe KDE Plasma Thermal Monitor widget has an annoying issue where the temperature sources will sometimes show as “Off” after rebooting. This seems to have broken around Ubuntu Groovy for me. This is a well known issue as referenced on the KDE forum among other places. To fix, I edited […]
Read moreWith VMWare 6.7U1 now released I decided to upgrade a small cluster of servers to the new release. As I run VMWare vCenter (the appliance version) I also wanted to upgrade that. The first issue I can into is the appliance showed no updates available. From the “Update” tab on […]
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