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Deleting a file does not always remove its contents right away. A raw disk image may still contain deleted file entries and data in space the filesystem has marked for reuse. The tools in this guide examine three layers of a disk image: files that still exist, deleted files the filesystem can identify, and raw […] The post A Linux Toolkit for Disk Image Recovery appeared first on Atomic Spin.
A practical Bash scripting guide for Linux users who know the command line but haven't committed to writing scripts yet. Covers variables, conditionals, loops, functions, error handling, and real-world examples you can actually use.Continue reading...
If your Linux server is bogged down by disk I/O, your first step may often be to use the top command in the terminal to check load averages.Continue reading...
I started bitwise because I was tired of opening the KDE calculator. Seven years, one Hacker News front page and sixteen distributions later, here's what I learned — mostly about how hard it is to get software to people.
Bash history does a lot more than scroll up. Learn how to configure HISTSIZE, timestamps, multi-terminal sync, and search shortcuts to get real productivity gains at the command line.Continue reading...
A practical guide to creating, managing, and tuning swap files and swap partitions on Linux using mkswap, swapon, and swapoff, with real commands and common troubleshooting fixes.Continue reading...
I recently reinstalled my main desktop from scratch: Debian testing via Kali underneath (read first before judging) and XFCE on top. One of the reasons I keep coming back to XFCE is its built-in power management.Continue reading...
Learn how to tune Linux kernel parameters using sysctl and /proc/sys for better network throughput, memory management, file I/O, and server security. Includes a ready-to-use baseline config.Continue reading...
The /proc filesystem is a live window into the Linux kernel: process state, memory layout, CPU counters, network stats, and writable kernel tunables, all accessible with nothing but cat and grep. This guide walks through the most useful files and per-process directories with practical examples.Continue reading...
A practical guide to DNS resolution on Linux: how /etc/resolv.conf, systemd-resolved, and dig work together, and how to troubleshoot common nameserver failures.Continue reading...
Password-based SSH login is a liability. This guide walks through generating SSH key pairs with ssh-keygen, deploying public keys, disabling password authentication, and managing multiple keys cleanly with ~/.ssh/config.Continue reading...
The nc command (netcat) is a lightweight but surprisingly powerful networking tool for port testing, file transfers, banner grabbing, and connectivity debugging. This practical guide covers the flags and real-world usage patterns that Linux users and sysadmins actually reach for.Continue reading...
If you've ever looked at your server and wondered why it's using swap even though plenty of RAM is available, you're not alone. This is a common scenario on Linux systems, and it can impact performance if not addressed.Continue reading...
Hard links and soft links in Linux both use the ln command but behave very differently. This practical guide explains exactly how each works, when to use which, and how to avoid the common pitfalls that catch even experienced sysadmins.Continue reading...
Linux is a powerful and versatile operating system that can be used for a wide range of purposes. For many system administrators, the command line interface is the primary way to interact with the system.Continue reading...
Update (one year later): The verdict is in. I went with the TP-Link SG2210XMP-M2, and after a full year in the rack it's been running flawlessly: fanless, multigig, VLANs and not a single issue.Continue reading...
This article is inspired by our LinuxCommunity.io forum discussion thread (thanks to users @tmick and @shybry747 for the feedback). Let's walk through what Podman is and how to use it as a Docker alternative on Linux.Continue reading...
The watch command runs any Linux command repeatedly at a set interval and displays the output full-screen, making it one of the quickest ways to monitor live system activity without writing a script. This guide covers all the key options with practical examples for real sysadmin use cases.Continue reading...
I’ll admit, I hesitated a bit before writing this post. The whole point of this linuxblog.io and linuxcommunity.io forum is to bring together like-minded Linux users and professionals so we can troubleshoot, share ideas, and learn from one another.Continue reading...
Nginx TLS tuning won't fix a slow application, but it does cut handshake overhead and improve connection reuse, which shaves milliseconds off every HTTPS request.Continue reading...
tmpfs lets you mount a filesystem entirely in RAM. Here is how Linux already uses it, how to create your own mounts, and where it actually makes sense to use one.Continue reading...
A practical guide to Linux user and group management using useradd, usermod, userdel, groupadd, gpasswd, and chage. Covers real-world examples, common mistakes, service accounts, and safe account removal.Continue reading...
One of the major shifts in developer ergonomics has been the introduction of functional pipelines to most popular languages. A pipeline is a chain of operations on a set of data that transforms the data into another shape or value. It is made functional by using lambda functions as the primary way of specifying behavior. git ls-files | grep -o "\.\w*$" | sort | uniq -c Linux has always been built around this idea; programs accept text input and produce text output. This allows you to chain programs together with pipes (|). The above example finds all tracked files in a git repo, then matches…
In January, we introduced our Nightly package for RPM-based Linux distributions. Today, we are thrilled to announce it is now available for Firefox Beta! Firefox Beta is great for testing your sites in a version of Firefox that will reach regular users in the coming weeks. If you find any issues, please file them on […] The post Firefox Developer Edition and Beta: Try out Mozilla’s .rpm package! appeared first on Mozilla Hacks - the Web developer blog.
A friend was using GDAL’s ogr2ogr command to import some data to PostGIS recently, and as part of the import they were doing a reprojection of the data. They got the following error: PROJ: Cannot open https://cdn.proj.org/uk_os_OSTN15_NTv2_OSGBtoETRS.tif: schannel: the certificate or certificate chain is based on an untrusted root They’ve had various SSL errors on […]
I came across a recent article on making Linux system calls from a Wine process. Windows programs running under Wine are still normal Linux processes and may interact with the Linux kernel like any other process. None of this was surprising, and the demonstration works just as I expect. Still, it got the wheels spinning and I realized an almost practical application: build my pkg-config implementation such that on Windows pkg-config.exe behaves as a native pkg-config, but when run under Wine this same binary takes the persona of a Linux program and becomes a cross toolchain pkg-config,…
Hi. I recently gave a talk in KernelTLV Meetup. The talk was uploaded to YouTube, so if you’re interested, go a head and watch it. The Talk is in Hebrew, but the slides are in English. The slides can be found here: DMA Survival Guide from Kernel TLV
Hi. In this post I will share a git pre-commit hook I created for aiding with code beautification. In Linux, I work in two different coding styles: User space and Kernel. The Linux kernel has a very specific coding style and every commit to kernel must adhere to that style. The Linux kernel provides a […]
I created pre-installed Ubuntu Server 15.04 64bit Virtualbox image to be used for various server side setups. It can be freely downloaded and used by you. all packages were updated to the current date (9/5/15). openssh server was installed and set to default port File can be downloaded from here: Link: UbuntuServer1504VboxImage.tar.bz2 MD5: eff64b08b8e2fc4ceb668a4e1a62b82d The […]