Hi. As some know now, I have an article about encrypting and protecting Linux – while using TPM to prevent the need to enter the encryption passphrase every time the system boots. This is one of the most popular article in this blog, and for a very good reason – people want their computers (especially…
Diving videos tend to be blueish. There are tools to automatically fix it, or at least – enhance the video so that the colours appear more natural. Unfortunately, most of these tools either don’t work well with Linux, or with my phone. After a short investigation, I was able to produce a satisfactory result with…
The IO scheduler blk_mq was designed to increase disk performance – better IOps and lower latency – on flash disk systems, with emphasis on NVME devices. A nice by-product, is that it increases performance on the “older” SCSI/SAS/SATA layer as well, when the disks in the back are SSD, and even when they are rotational…
Every Linux admin is familiar with the long time running through a large directory tree (with hundred of thousands of files and more) can take. Most are aware that if you re-run the same run-through, it will be shorter. This is caused by a short-valid filesystem cache, where the memory is allocated to other tasks,…
This blog is my extended memory, and as such, its task is to remind me things I tend to forget, saving me the time required to search them again. So here is another one of these things. The network settings syntax for RHEL8/OEL8 or any of their compatible systems, when you want to pass these…
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…
