My system provides DNS services, using dnsmasq, to several different subnets. I wish to log specific queries to different files – as I want to identify, and maybe even respond to certain DNS queries of the IoT network. The (excellent) utility dnsmasq is unable to split the logging into multiple log files, or filter logging…
There are two topics I would like to describe here, for later reference (by myself, of course. This blog is my extended memory). The first is about how to create a bootable ISO out of RHEL extracted ISO, and the other is about how to download only specific update, or make your own RHEL updates…
I have had a problem with RPI Zero. The system was working fine, and then it did not. I am using Raspbery Linux (Debian-based) with kernel 5.10.17+. Once a while (usually with network load) the system loses connectivity. Everything seems to be fine, if you have a serial/USB console there, but the wireless network fails….
All ZFS users are familiar with ‘zpool iostat’ command, however, it is not easily translated into Linux ‘iostat’ command. Using large pools with many disks will result in a mess, where it’s hard to identify which disk is which, and going to a translation table from time to time, to identify a suspect slow disk….
I have had an interesting experience with HPE servers, where the BIOS was defined to allow max performance (in contrast to ‘balanced’ mode), but still – the CPU was not at max all the time. While we generally, strive to a greener computing, when having low-latency workload, we expect a deterministic performance. We want our…
With the update to version 8 (or, if to be accurate, according to common documentations, 8.3 and above), VNC configuration has had a major overhaul, and it is entirely different. Most documentations will refer to using ‘gnome’ as the desktop manager, however – if you want something lightweight with minimal impact (both package-wise and performance-wise),…
