LinuxBlog.io

Bash history does a lot more than scroll up.

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.

I recently reinstalled my main desktop from scratch: Debian testing via Kali underneath (read first before judging) and XFCE on top.

Learn how to tune Linux kernel parameters using sysctl and /proc/sys for better network throughput, memory management, file I/O, and server security.

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.

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.

Password-based SSH login is a liability.

The nc command (netcat) is a lightweight but surprisingly powerful networking tool for port testing, file transfers, banner grabbing, and connectivity debugging.

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.

Hard links and soft links in Linux both use the ln command but behave very differently.

Servers give you warnings before they fail.

Linux is a powerful and versatile operating system that can be used for a wide range of purposes.

Update (one year later): The verdict is in.

This article is inspired by our LinuxCommunity.io forum discussion thread (thanks to users @tmick and @shybry747 for the feedback).

Last week I walked into an empty 5 × 4 ft storage room.

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.

I’ll admit, I hesitated a bit before writing this post.

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.

tmpfs lets you mount a filesystem entirely in RAM.

Every so often, something surfaces in the LinuxCommunity.io forums that deserves a wider audience.