Resources
Resources, Technical Notes, Cheat Sheets and Free Stuff
We are prolific note takers with all our projects. We aim to create and share technical notes, cheat sheets, how to guides, etc based on customer needs or requests.
The authors’ (team) combined experience in the IT industry totals well over 100 years. Our expertise and experience covers a multitude of technologies, computer hardware, operating systems, virtual machines, networking products, data recovery procedures, migrations, etc. Refer to About Us.
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Latest Resources and Technical Notes
Red Hat Linux System Running Slow: Performance Monitoring and Troubleshooting Guide
Red Hat Linux System Running Slow: Performance Monitoring and Troubleshooting Guide A field guide for diagnosing slow...
Managing Linux Services with systemctl – systemd on RHEL 10, 9 and 8
Managing Linux Services with systemctl - systemd on RHEL 10, 9 and 8 A practical guide for Red Hat Enterprise Linux...
SELinux Explained for Beginners
SELinux Explained for Beginners What it protects, how it works, and how to solve everyday access problems Introduction...
Debian and Ubuntu Fault Detection, Analysis, Troubleshooting and Collecting Support Data
Debian and Ubuntu Fault Detection, Analysis, Troubleshooting and Collecting Support Data A troubleshooting guide for...
Red Hat Fault Detection, Analysis, Troubleshooting and Collecting Support Data
Red Hat Fault Detection, Analysis, Troubleshooting and Collecting Support Data A RHEL Linux guide for system...
Protecting Yourself and Your Organisation From AI Enabled Threats
Protecting Yourself and Your Organisation From AI Enabled Threats A guide for people, businesses and government teams....
Ransomware Protection Methods and Recovery Guide
Ransomware Protection Methods and Recovery Guide Practical guidance for users, administrators and architects or...
Ansible Playbooks for Beginners: A Practical Guide
Ansible Playbooks for Beginners: A Practical Guide A practical, Linux-focused introduction to using Ansible safely...
Solaris 11 and Solaris Cluster 4: HA-NFS on a Stretched Two-Node Campus / Metro Cluster Guide
Solaris 11 and Solaris Cluster 4: HA-NFS on a Stretched Two-Node Campus / Metro Cluster Guide Architecture,...
Solaris 11 and Solaris Cluster 4: HA-NFS on a Local Two-Node Cluster Guide
Solaris 11 and Solaris Cluster 4: HA-NFS on a Local Two-Node Cluster Guide Architecture, Implementation, Operations...
Linux HA-NFS on a Stretched Two-Node Corosync and Pacemaker Cluster
Linux HA-NFS on a Stretched Two-Node Corosync and Pacemaker Cluster Corosync, Pacemaker, DRBD 9, XFS, NFSv4 - A...
Linux HA-NFS on a Local Two-Node Corosync and Pacemaker Cluster
Linux HA-NFS on a Local Two-Node Corosync and Pacemaker Cluster A production implementation, validation and operations...
Oracle Linux Desktop – An Enterprise Alternative to Ubuntu (and Windows)
Oracle Linux Desktop – An Enterprise Alternative to Ubuntu (and Windows) Continuation of: Ubuntu Desktop –...
Solaris 11.4 Compliance and Auditing Cheat Sheet
Solaris 11.4 Compliance and Auditing Cheat Sheet A practical whitepaper for critical systems and custom application...
Linux Performance Analysis Tools, Actions and Best Practices
Linux Performance Analysis Tools, Actions and Best Practices Debian / Ubuntu and Red Hat Enterprise Linux / Oracle...
Red Hat and Oracle Linux File Systems Management Cheat Sheet
Red Hat and Oracle Linux File Systems Management Cheat Sheet Platform scope: Red Hat Enterprise Linux 8-10 and Oracle...
Debian and Ubuntu Linux File Systems Management Cheat Sheet
Debian and Ubuntu Linux File Systems Management Cheat Sheet Platform scope: Debian 12-13 and Ubuntu 22.04 LTS, 24.04...
Red Hat and Oracle Linux Storage Management Cheat Sheet
Red Hat and Oracle Linux Storage Management Cheat Sheet Disk, filesystem, LVM, software RAID, multipath, NVMe, iSCSI,...
Debian and Ubuntu Linux Storage Management Cheat Sheet
Debian and Ubuntu Linux Storage Management Cheat Sheet Disk, filesystem, LVM, software RAID, multipath, NVMe, iSCSI,...
Red Hat and Oracle Linux Firewall Management Cheat Sheet
Red Hat and Oracle Linux Firewall Management Cheat Sheet Modern firewalld and nftables guidance for Red Hat Enterprise...
Debian and Ubuntu Linux Firewall Management Cheat Sheet
Debian and Ubuntu Linux Firewall Management Cheat Sheet Practical host-firewall guidance for supported Debian and...
Red Hat and Oracle Linux: Create and Manage a Local DNF/YUM Package Repository
Red Hat and Oracle Linux: Create and Manage a Local DNF / YUM Package Repository Practical cheat sheet for building,...
Debian and Ubuntu: Create and Manage a Local APT Package Repository
Debian and Ubuntu: Create and Manage a Local APT Package Repository Practical cheat sheet for building, securing,...
Linux High Availability Pacemaker Corosync and PCS: Fencing and Quorums Explained and Best Practices
Linux High Availability Pacemaker, Corosync and PCS: Fencing and Quorums Explained and Best Practices A practical...
Linux High Availability with Pacemaker, Corosync and PCS – A Complete Field Guide
Linux High Availability with Pacemaker, Corosync and PCS - Complete Field Guide From first-response troubleshooting to...
UNIX Text-Processing (awk, cut, grep) Cheat Sheet
UNIX Text-Processing Cheat Sheet awk, nawk, cut, grep, egrep, ggrep, and fgrep This guide is aimed at system...
Data: Disaster Prevention vs Disaster Recovery
Data: Disaster Prevention vs Disaster Recovery The Real Cost of Failure and the Business Value of Being Ready A...
Hard Disk making Noises? Here’s what to do.
What to Do If Your Hard Disk Is Making Noises Unusual noises from a hard disk are a warning sign. Acting quickly — and...
Single Points of Failure in IT Infrastructure and How to Eliminate Them
Single Points of Failure in IT Infrastructure and How to Eliminate Them How to identify, design and govern IT...
Red Hat Linux NFS Server Cheat Sheet
Red Hat Enterprise Linux and Oracle Linux NFS Server Configuration and Management General Description of an NFS Server...
Red Hat Linux Networking Cheat Sheet
Red Hat Enterprise Linux and Oracle Linux Networking Cheat Sheet and Guide General Description of Linux Networking...
Debian and Ubuntu Linux NFS Server Cheat Sheet
Debian and Ubuntu Linux NFS Server Configuration and Management General Description of an NFS Server Network File...
Debian and Ubuntu Linux Networking Cheat Sheet
Debian and Ubuntu Linux Networking Cheat Sheet and Guide General Description of Linux Networking Linux networking is...
How to Avoid Data Loss and Achieve a Better RPO Using Backups Replication Snapshots PIT Copies and File Synchronisation
How to Avoid Data Loss and Achieve a Better Recovery Point Objective (RPO) Using Backups, Replication, Snapshots,...
How to Evaluate Whether Your Backups Are Really Protecting You and Your Data
How to Evaluate Whether Your Backups Are Really Protecting You and Your Data A Practical Guide to Backup Design,...
How to Evaluate Backup Products Before You Buy
How to Evaluate Backup Products Before You Buy A Recovery-First Product Evaluation and Test Guide For personal users,...
Personal IT Security Awareness and Best Practice Guide
Personal IT Security Awareness and Best Practice Guide This white paper is written to bring security awareness...
What RTO and RPO Mean to Your Business
What RTO and RPO Mean to Your Business Introduction A practical whitepaper for executives, business managers and...
Red Hat Package Management Cheat Sheet
Red Hat Package Management Cheat Sheet Introduction Keeping the operating system up to date is one of the most...
Debian and Ubuntu Package Management Cheat Sheet
Debian and Ubuntu Package Management Cheat Sheet Keeping the operating system up to date is one of the most important...
Ubuntu Desktop – Migrate from Windows 11 to Ubuntu
Ubuntu Desktop – Migrate from Windows 11 Introduction The shift from Windows 11 to Ubuntu is increasingly...
wget Cheat Sheet and How To Guide
wget is a command-line utility that allows you to download files from the internet. It supports HTTP, HTTPS, and FTP...
Introduction to Data Protection and Recovery
Introduction to Data Protection and Recovery Data is one of the most valuable assets you own - whether you are a home...
Secure Shell (ssh) Cheat Sheet and How To Guide
Secure Shell (ssh) Cheat Sheet and Guide General Description of SSH Secure Shell (SSH) is a cryptographic network...
Best Practice Designs for High Availability and Disaster Recovery
Designing Your IT Infrastructure for High Availability and Disaster Recovery and Best PracticesIntroduction The...
rsync Cheat Sheet and How To Guide
rsync Cheat Sheet and How To Guide Overview: What is rsync? rsync (remote sync) is a powerful file synchronization...
IT Systems Inventory and Configuration Register
IT Systems Inventory and Configuration Register A free, client-brandable spreadsheet template created by KAOS Data....
bash Shell Command Recall Cheat Sheet and How To Guide
Introduction Is typing the worst part of your administration tasks? Cannot type fast, effectively, properly? Then...
How to Avoid Data Loss and Get Greater Recovery Point Objective (RPO) with Backups
This is Part 1 of a common topic of discussion to achieve greater recovery point objective (RPO). This part will cover...
Data Recovery from Hard Disks and Frequently Asked Questions
Data Recovery from Hard Disks: Frequently Asked Questions A practical customer guide to hard-disk data recovery. This...