Redhat tuned-adm
Installing and configuring Tuned To start using tuned we will first need to install the packages for it: [root@server ~]# yum install […]
chattr and lsattr: Make Files Immutable or Append-Only on Linux
Updated for 2026: this started life as a four-command tip. It deserved better — chattr is one of those tools […]
How to Install Only Security Updates on RHEL 9/10 and AlmaLinux 9/10 (DNF)
Updated for 2026: the original version of this post covered the yum-plugin-security era — RHEL 5, 6 and 7, all […]
Updating Dell PowerEdge servers via bootable media / ISO
Credit DELL: http://www.dell.com/Support/Article/ca/en/cabsdt1/SLN296511 This article provides information about how to update all the firmware for your Dell PowerEdge servers in […]
Netapp Thick / Thin Provisioning
Updated for 2026: this guide was originally published in February 2017. It has been rewritten for clustered ONTAP. The 7-mode […]
How to Check MySQL and MariaDB Database Sizes from the Command Line
Updated for 2026: the original snippet answered “how big are my databases?” with one query and a typo. The query […]