Learn beyond the lab
Practical exam guides, troubleshooting notes and skill-building insights from RCW IT Training.
Linux Troubleshooting: Boot Failures, Read-Only Roots and Phantom Disk Usage
Linux and RHEL · Troubleshooting guide
Read article →Linux Troubleshooting: High Load with Idle CPU, and SSH Logins That Crawl
Linux and RHEL · Troubleshooting guide
Read article →VMware Troubleshooting: Stuck Snapshots, Consolidation Alerts and Datastores That Fill Up
VMware vSphere · Troubleshooting guide
Read article →VMware Troubleshooting: vCenter STS Certificate Expiry and VMs That Lose Network After vMotion
VMware vSphere · Troubleshooting guide
Read article →GCP Troubleshooting: SSH Timeouts, 403 Permission Denied and Quota Exceeded Errors
Google Cloud · Troubleshooting guide
Read article →AWS Troubleshooting: EC2 Reachability Failures, S3 AccessDenied and EBS Volumes That Fill Up
AWS · Troubleshooting guide
Read article →Azure Troubleshooting: VMs Stuck Starting, NSG Blocks and Entra ID Sign-In Failures
Microsoft Azure · Troubleshooting guide
Read article →Azure Virtual Desktop (WVD) Simulation: AZ-140 Question with Answer and Explanation
Microsoft Azure · AZ-140 simulation · Exam practice
Read article →Intune Troubleshooting: Enrollment Failures, Devices That Will Not Sync and Win32 App Installs
Microsoft Intune · Troubleshooting guide
Read article →Windows Autopilot Device Association: A Step-by-Step Setup Guide
Microsoft Intune · Step-by-step guide
Read article →Intune Remote Help Unattended Access: Setup Guide (Remote Sign-In)
Microsoft Intune · Step-by-step guide
Read article →Endpoint Privilege Management: Support-Approved Elevations in Intune
Microsoft Intune · Step-by-step guide
Read article →Windows Autopatch Hotpatching & Update Readiness: A Setup Guide
Microsoft Intune · Step-by-step guide
Read article →macOS Recovery Lock in Microsoft Intune: A Step-by-Step Guide
Microsoft Intune · Step-by-step guide
Read article →Enterprise Storage Troubleshooting: Latency Spikes, Missing LUNs and Multipath Path Failures
Enterprise Storage · Troubleshooting guide
Read article →Veeam Troubleshooting: Failed Jobs, VSS Indexing Errors and Snapshot Removal Warnings
Veeam Backup · Troubleshooting guide
Read article →Commvault Troubleshooting: Jobs Waiting on Mount Paths, Offline Clients and Media Agent Pressure
Commvault · Troubleshooting guide
Read article →Dell PowerEdge Troubleshooting: iDRAC Access, POST Failures and Degraded PERC Arrays
Dell PowerEdge · Troubleshooting guide
Read article →Pure Storage FlashArray Troubleshooting: Capacity Alerts, Hosts Missing Volumes and Replication Lag
Pure Storage · Troubleshooting guide
Read article →Active Directory Troubleshooting: Replication Failures, DNS Errors and Lingering Objects
Active Directory · Troubleshooting guide
Read article →Active Directory Troubleshooting: Broken Trust Relationships, Kerberos Time Skew and Missing GPOs
Active Directory · Troubleshooting guide
Read article →15 Common RHCSA Mistakes — and How to Avoid Them
A focused exam guide to persistence, SELinux, storage, permissions, verification and time management.
Read article →Basic Sales Skills: A Practical Guide for Beginners
Build trust, discover customer needs, communicate value and agree on a clear next step.
Read article →Veeam Immutable Backup Design: Advanced Patterns for Ransomware Resilience
Veeam Backup · Advanced technical guide
Read article →Veeam Recovery Objectives: Turning Backup Jobs into Proven Recovery
Veeam Backup · Advanced technical guide
Read article →TrueNAS ZFS Storage Architecture: Vdev Layout, Capacity and Failure Domains
TrueNAS Storage · Advanced technical guide
Read article →TrueNAS Snapshots and Replication: A Practical Disaster-Recovery Design
TrueNAS Storage · Advanced technical guide
Read article →VMware Cloud Foundation Workload Domains: Design for Lifecycle and Isolation
VMware Cloud Foundation · Advanced technical guide
Read article →VMware Cloud Foundation Network Security: NSX Segmentation and Operations
VMware Cloud Foundation · Advanced technical guide
Read article →AWS Multi-Account Security Baseline: Guardrails that Scale
AWS · Advanced technical guide
Read article →AWS Resilience and Disaster Recovery: Selecting the Right Pattern
AWS · Advanced technical guide
Read article →Microsoft Intune Zero-Touch Windows Deployment: Autopilot Design
Microsoft Intune · Advanced technical guide
Read article →Microsoft Intune Compliance and Conditional Access: A Layered Control Model
Microsoft Intune · Advanced technical guide
Read article →Kubernetes Workload Failures: CrashLoopBackOff, ImagePullBackOff, Pending and OOMKilled
Kubernetes · Detailed troubleshooting guide
Read article →NGINX 502 and 504: Reading Upstream Errors Like the Error Log Does
NGINX · Detailed troubleshooting guide
Read article →PostgreSQL Locks and Deadlocks: Finding the Session That Blocks Everyone
PostgreSQL · Detailed troubleshooting guide
Read article →Terraform State, Locks and Drift: Recovering a Broken Plan
Terraform · Detailed troubleshooting guide
Read article →Ansible Playbook Failures: Unreachable Hosts, Failed Tasks and Idempotency
Ansible · Detailed troubleshooting guide
Read article →DNS Failures: NXDOMAIN, SERVFAIL, Slow Lookups and Split-Horizon Traps
Networking · Detailed troubleshooting guide
Read article →NFS and SMB Mount Failures: Stale Handles, Permission Denied and Hung Mounts
Storage · Detailed troubleshooting guide
Read article →Redis Latency, Evictions and Persistence: Reading INFO Like an Incident Report
Redis · Detailed troubleshooting guide
Read article →Microsoft Security Patch Roundup — Week of August 25, 2026
Microsoft Security · Weekly official patch update roundup
Read article →GCP Troubleshooting: GKE Upgrade Failures — Node Pool Repair, PDBs and Quota
Google Cloud · Detailed troubleshooting guide
Read article →Linux Troubleshooting: Packet Loss — Ring Buffers, Softirq, Duplex and MTU
Linux · Detailed troubleshooting guide
Read article →VMware Troubleshooting: ESXi Purple Screen (PSOD) — Reading the Dump and Finding the Cause
VMware vSphere · Detailed troubleshooting guide
Read article →Backup Troubleshooting: VSS Shadow Copy Failures — Writers, Event IDs and Shadow Storage
Backup · Detailed troubleshooting guide
Read article →Storage Troubleshooting: ZFS Degraded and Faulted Pools — Scrub Errors, Resilver and Disk Replacement
Storage · Detailed troubleshooting guide
Read article →Storage Troubleshooting: Fibre Channel Zoning, Missing LUNs and Path Loss
Storage · Detailed troubleshooting guide
Read article →GCP Troubleshooting: Cloud SQL Connection Failures — Auth, Connector and Private IP
Google Cloud · Detailed troubleshooting guide
Read article →Linux Troubleshooting: Boot Failures — grub rescue, initramfs and Emergency Shell
Linux · Detailed troubleshooting guide
Read article →Backup Troubleshooting: Object-Store Backups with rclone and restic — Throttling, Checksums and Object Lock
Backup · Detailed troubleshooting guide
Read article →VMware Troubleshooting: Datastore Full — Snapshots, Thin Disks and Space Reclamation
VMware vSphere · Detailed troubleshooting guide
Read article →GCP Troubleshooting: Cannot SSH to a VM — Firewalls, OS Login and Serial Console
Google Cloud · Detailed troubleshooting guide
Read article →Storage Troubleshooting: iSCSI Login Failures and Multipath Path Flapping
Storage · Detailed troubleshooting guide
Read article →Backup Troubleshooting: rsync and restic Failures, and Restore Verification
Backup · Detailed troubleshooting guide
Read article →Linux Troubleshooting: No Space Left on Device When df Shows Free Space
Linux · Detailed troubleshooting guide
Read article →VMware Troubleshooting: vMotion Failures, Timeouts and Compatibility Errors
VMware vSphere · Detailed troubleshooting guide
Read article →Microsoft Security Patch Roundup — Week of August 26, 2026
Microsoft Security · Weekly official patch update roundup
Read article →Microsoft Security Patch Roundup — Week of August 28, 2026
Microsoft Security · Weekly official patch update roundup
Read article →Microsoft Security Patch Roundup — Week of August 29, 2026
Microsoft Security · Weekly official patch update roundup
Read article →Microsoft Security Patch Roundup — Week of August 29, 2026
Microsoft Security · Weekly official patch update roundup
Read article →Microsoft Security Patch Roundup — Week of August 30, 2026
Microsoft Security · Weekly official patch update roundup
Read article →Microsoft Security Patch Roundup — Week of September 1, 2026
Microsoft Security · Weekly official patch update roundup
Read article →Exam simulators · Timed & practice modes
Certification Practice Exams
430+ realistic multiple-choice questions with instant feedback, detailed explanations, flagging and a scored report. Practice mode or a timed exam that feels like the real thing — each exam opens on its own page.
Cisco CCNA
Exam 200-301Networking fundamentals, switching, routing, IP services, security basics, wireless and automation.
SECCisco CCNA Security
Exam 210-260 IINSAAA, 802.1X/ISE, firewalls, IPS, IPsec & SSL VPNs, cryptography and network hardening.
VCFVMware Cloud Foundation
VCF (5V0-31.x style)SDDC Manager, workload domains, bring-up, vSAN, NSX, lifecycle management and operations.
CCE-VCitrix CCE-V
Exam 1Y0-403Designing Citrix Virtual Apps & Desktops: FlexCast, provisioning, NetScaler, profiles and DR.
Unofficial self-study practice. CCNA, Cisco, VMware and Citrix are trademarks of their respective owners; not affiliated with or endorsed by them.
Public learning catalogue
Practice by technology
Explore independent labs, simulators and challenges through a catalogue organised by group, technology, content type and specialist subcategory.
RHCSA Certification Practice
62 original, independent challenge labs mapped task by task to the published EX200/RHEL 10 skill areas. Every lab evaluates modeled state, awards a score out of 100 and supports the RCW IT Training completion certificate.
IT Incident Response
Eight incoming tickets — lockouts, 502s, mail outage, disk pressure, VPN, certificates, onboarding vs incident, and a compromised jump host. Train like an L1 analyst using the evidence in each ticket.
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Show off your scores, build your Skill Passport, and put your friends on the spot.