90 Linux Commands frequently used by Linux Sysadmins

There are well over 100 Unix commands shared by the Linux kernel and other Unix-like operating systems. If you are interested in the commands frequently used by Linux sysadmins and power users, you’ve come to the place. Recently, I published a five-part series covering commands often used by Linux sysadmins. Below I’ve listed the 90 […]

Linux Commands frequently used by Linux Sysadmins – Part 5

This is the final part of the five-part series entitled: Linux Commands frequently used by Linux Sysadmins. So far, we’ve covered over 50  commands regularly used by Linux sysadmins and power users. Refer to part 1, part 2, part 3, and part 4. This article will look into another set of commands and command-line tools […]

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 60 commands often used by Linux Sysadmins and power users. Refer also to part 1, part 2, […]

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 often used by Linux Sysadmins and power users. Also, see Part 4 and Part 5. […]

atop – For Linux server performance analysis

We’re all familiar with top, a real-time system monitor. Some prefer htop and previously I mentioned iotop for use with storage read/write monitoring. Lets looks at another popular tool for Linux server performance analysis: atop.   Advantages of atop Atop is an ASCII full-screen performance monitor which can log and report the activity of all server processes. One feature […]

Using CentOS CR (Continuous Release) Repo

CentOS (Community Enterprise Operating System) is a Linux distribution that attempts to provide free, enterprise-class, community-supported computing platform functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL). CentOS is run by volunteers who work directly with Red Hat’s RPM source files and pushing them to CentOS for release. At times the project will fall behind […]

Linux Performance: Almost Always Add Swap. Part 2: ZRAM

Previously, we looked at how swap space, particularly swapping, can severely slow down Linux performance. We then tweaked Linux kernel parameters to make better use of server memory and to avoid heavy swapping. That article created some debate and good arguments for and against swap space. For example, if you have more than enough memory […]

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 these […]

Enable Automatic Updates – Fedora/Red Hat/CentOS + Bonus Tip

As a reminder, Red Hat Enterprise Linux is based on Fedora Linux and CentOS is a 100% compatible rebuild of Red Hat Enterprise Linux. With that out of the way, lets move on. Linux server security is crucial to Linux server administration. Part of keeping Linux servers secure, is to install security updates shortly after they […]

Choosing the Best Linux Server Distro 2019

Are you trying to decide on a Linux server distro (distribution) in 2019? This article will help guide you based on the strengths of the Linux server distributions available. If you are looking for desktop advice, have a look at Choosing the Best Linux Distro 2019, for Desktop.   Best Linux Server distro 2019 The first […]