Linux: ncdu and mc to manage large directories

Creating, modifying, and deleting files are everyday tasks performed in any operating system, even more so by Sysadmins, Developers, and Programmers. For the most part, these tasks are fast enough when managing a handful of files. However, on Linux and especially with servers, you may at some time have to manage millions or even billions […]

Checkout these 100% Free tools by Solarwinds

SolarWinds believes observability is about understanding the complete state of your application and infrastructure environment. Developers and support personnel must have comprehensive and consistent infrastructure and application performance metrics, visibility into application performance down to the line of code, the ability to trace service relationships, and a comprehensive view into related logs. With their integrated […]

Home Lab Beginners guide – Hardware

Until recently, and for well over the past decade, my wife and I have been nomads. Moving from the Caribbean to Miami, New York, Las Vegas, Vancouver, and now back home. This has meant that for many of those years, my home office basically comprised of a few laptops and screens. These days, we are more […]

htop and top Alternatives: Glances, nmon

Previously we looked at top, atop, and indirectly (due to its popularity) htop. But are there other alternatives worth looking at? Regarding system health and performance, this is a matter of preference regarding the displayed data most important to you. We all prefer different ways of viewing the same thing. Update: also consider btop. htop […]

bash: /usr/bin/rm: Argument list too long – Solution

Over time, the storage used on Linux systems you manage will grow. As a result, you will, at some point, try to delete, move, search, or otherwise manipulate thousands of files using commands such as rm, cp, ls, mv, and so on, which are all subject to this limitation. As such, you will eventually come […]

MySQL 8 sample config (my.cnf example) and tuning.

A while back, I wrote the article Tuning MySQL my.cnf? Avoid this common pitfall! With the release of MySQL 8 I wanted to paste some of a my.cnf config file for discussion, suggestions and questions. With the launch of the blog’s tech forums, I’m hoping that the performance tuning tips that emerge will be from […]

25 Best CDN Providers 2022

A content delivery network, also referred to as a content distribution network (CDN), is a geographically distributed network of data centers containing proxy servers. CDN providers serve internet content, including web objects (text, graphics, and scripts), downloadable objects (media files, software, documents), applications (e-commerce, portals), live-streaming media, to name closer to and thus faster, to end-users. Some of the […]

Could not increase number of max_open_files to more than… (Solution)

A quick solution to the warning “Could not increase number of max_open_files to more than” when starting MySQL or MariaDB. For some background, read How MySQL Opens and Closes Tables. Here’s an excerpt: “The table_open_cache and max_connections system variables affect the maximum number of files the server keeps open. If you increase one or both of […]

What is iowait and how does it affect Linux performance?

I/O wait or iowait, wait, wa, %iowait, or wait% is often displayed by command-line Linux system monitoring tools such as top, sar, atop, and others. On its own, it’s one of many performance stats that provide us insight into Linux system performance. I/O wait came up in a recent discussion with a new client. During our […]

Free vs. Available Memory in Linux

At times we will need to know precisely how our Linux systems use memory. This article will examine how to use the free command-line utility to view memory usage on a Linux system. In doing so, we will clearly define the difference between free vs. available memory on Linux systems.   Free vs. Available memory […]