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Troubleshoot Linux kernel panic with kdump crash tool

Kernel panic is a critical issue that manifests as a system freeze. If you're not familiar with what a kernel does, it is the core of an OS. Linux itself is a kernel, which enables developers to create numerous distributions. A serious enough error at the kernel can cause an event known as kernel panic. This is similar to Window's blue screen of death, but instead of seeing a blue screen, you simply see a log output on a black screen. Kernel panic can occur due to bad memory, driver crashes, malware or software bugs. To identify the cause of kernel panic, you can use the kdump service to collect crash dumps, perform a root cause analysis and troubleshoot the system. To get started, you should have two VMs that run CentOS. This tutorial uses CentOS 8 as the Linux distribution for both the Network File System (NFS) server and client. If you configure the client to send the crash dumps to an NFS share, you can centrally gather and analyze a crash dump without using the system that is affected by kernel panic. Below are the IP addresses of the NFS server and client. Your addresses may differ depending on your subnet configuration, but both addresses are necessary. Read more

CopyQ Clipboard Manager 3.12.0 Released (Ubuntu PPA)

Advanced clipboard manager CopyQ 3.12.0 was released yesterday with new script function, dark mode improvements, and various bug-fixes. CopyQ is a free open-source clipboard editor with editing and scripting features. Read more

espanso: An Open Source Cross-Platform Text Expander That Will Help You Type Faster and be More Productive

If you’re using keyboard macros or mouse macros, you’re probably already saving a lot of time to get things done. But, you can’t just use macros to type everything. Yes, maybe a thing or two, but not a lot of things. And, for that very reason, a text expander should come in very handy. In this article, I’ll take a look at espanso, which is an open-source text expander. Read more

GNOME: Cover Thumbnailer and 4K

  • Cover Thumbnailer Shows Folder Thumbnails For Image And Music Directories (Nautilus, Caja, Thunar)

    For music folders (needs to have cover.jpg/png inside the folder), the application lets you choose the thumbnail resize method (crop or preserve), and if to allow mosaic or not. For the pictures folder, you can choose the maximum number of pictures to show on the thumbnail. Besides the default Pictures and Music folders, you can add extra folders, and ignore folders if you wish.

  • GNOME Optimizations Continue In Striving For Faster 4K Experience

    Canonical's Daniel Van Vugt has been engaged in several weeks now in optimizing GNOME for a faster 4K experience particularly when using Intel graphics but many of these optimizations pan out for other GPUs and resolutions too. Over the past week he's been working on yet more optimizations. We have been reporting on many of Daniel's significant performance optimizations and he's seemingly had no shortage of finding areas to optimize. As part of his status update for the weekly Ubuntu desktop team reports, Daniel noted, "Continued progress toward making 4K (or any resolution) faster and smoother..."