Networking, system administration and more
Networking, system administration and more
Choosing 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 moreThese are the steps I use to get a dump of all password hashes from a domain controller and then crack the hashes with hashcat or john. Excluding the dumping of password hashes, these steps are all executed on a Linux host. If you are trying to do this completely […]
Read moreWhen working with lists of IP’s with Puppet there are some common tasks that you will most likely encounter: Aggregate IP’s – As an example, if you have a firewall rule and the source list is like this: That list can be condensed into a single rule for only 192.0.2.0/24. […]
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 moreTo debug some issues with DNS (specifically EDNS related issues) I thought I would use Scapy so that I could craft the packets the exact way I wanted. As the issue was only occurring for some queries but not others due to the queries being sent to different front end […]
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