Linux Commands frequently used by Linux Sysadmins – Part 4

We are now up to part 4 of this five-part series entitled: Linux Commands frequently used by Linux Sysadmins. By the end of this series, we will cover at least 50 commands. Thus far, we touched on around 40 commands often used by Linux Sysadmins and power users. Refer to Part 1, Part 2, and Part 3. Let’s […]

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 […]

How to install vsftpd on CentOS 8 for FTP with Security

Disclaimer: It’s strongly recommended that you use SSH and SFTP (SSH File Transfer Protocol) instead of FTPS (FTP with Security). FTPS is now obsolete. SFTP is installed by default on Unix, Linux, and Mac systems as part of the OpenSSH package and is supported by almost all free and commercial file transfer tools. (i.e. Filezilla, Cyberduck) If for some reason you still […]

100+ Application Monitoring tools and Server Monitoring Solutions

Looking for application monitoring tools and server monitoring solutions? On this page, I’ve listed the top application performance monitoring (APM), server monitoring, and observability solutions to date. The listings are updated frequently as APM and observability solutions continue a rapid evolution. While I haven’t tested all of these solutions, I’ve used more than a third […]

Linux Commands frequently used by Linux Sysadmins – Part 3

Last week and the week before, I published part 1 and part 2 of this five-part series entitled: Linux Commands frequently used by Linux Sysadmins. Those two articles took us a bit deeper into what I believe are around 50 to 100 commands frequently used by Linux Sysadmins and power users. Let’s jump into part 3 with another […]

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 with an insight into Linux system performance. I/O wait came up in a recent discussion with a new client of […]

Linux Commands frequently used by Linux Sysadmins – Part 2

Last week, I published part 1 of this five-part series entitled: Linux Commands frequently used by Linux Sysadmins. That first article scratched the surface of what I believe are 50 to 100 commands used frequently by Linux Sysadmins and power users. Let’s jump into another set of commands and command-line tools often used for analysis, troubleshooting, and […]

Linux Commands frequently used by Linux Sysadmins – Part 1

What are some of the Linux commands used by Sysadmins and power users on a daily basis? In this article, I’ve listed 10 such commands, frequently used. Suggestions and feedback welcome. Also see Part 2, Part 3, and Part 4. Some people consider Linux as a being a complicated operating system, geared toward expert users only. However, as a […]

20 Leading Companies Share How COVID-19 is Accelerating the Future of APM

One year ago, I asked 12 of the leading providers of application performance monitoring (APM) and other SaaS-based monitoring services: what will the future of APM look like in 2020?  They pointed to the rise of AIOps (Artificial Intelligence for IT Operations), Big Data, and Digital Experience Monitoring (DEM) as the core advancements in this space. […]

bashtop – the ‘cool’ top alternative.

Meet bashtop, an esthetically pleasing system monitor, written completely in Bash. Yup, you can view all 5000 lines of code, by simply opening /usr/bin/bashtop with a text editor or view on Github. Over the years, the available options for command-line system monitoring tools have grown quite a bit. There is top, htop, glances, nmon, ytop, gtop, vtop, and […]