Tutorials
In-depth technical tutorials, guides, and infrastructure best practices.
Install and Secure FreeBSD 15.1 on a VPS: SSH, pkg, Firewall, and Updates
Install and secure FreeBSD 15.1 on a VPS with SSH keys, pkg, time sync, safe PF firewall rules, rollback steps, and the right system update method.
Fix Windows VPS Black Screen After RDP Login Without Losing Remote Access
Fix a Windows VPS black screen after RDP login. Check Explorer, display settings, hung sessions, and graphics policies while keeping a recovery path ready.
Fix An Internal Error Has Occurred in Windows Remote Desktop
Fix an internal error that has occurred in RDP with simple steps. Test the client, VPN, TLS certificate, Event Viewer logs, and server load.
How to Fix RDP Port 3389, Services, and Firewall on a Windows VPS
Windows VPS remote desktop cannot connect? Use the console, test port 3389, check TermService, firewall, and NLA with simple PowerShell steps.
Fix Windows VPS Disk Full | Free C: Drive Space with PowerShell
Windows VPS disk full? Find what uses your C: drive, clean it safely with PowerShell and DISM, extend the disk, and set an 85% alert.
Linux Disk Space Not Freed After Deleting Files: How to Fix It
Deleted files, but Linux disk space is still full? Find deleted open files with lsof, identify the process, and reclaim space safely.
Troubleshoot Proxmox Backup Server: Failed Backups, Locks, GC, and S3 Fixes
Troubleshoot Proxmox Backup Server: fix failed backups, datastore locks, garbage collection, verify errors, and PBS 4.2 S3 cache problems.
How to Deploy GitHub Actions Runner Controller Scale Sets on K3s
Learn how to deploy ARC scale sets on k3s with Helm. Set up GitHub auth, min/max runners, Docker or Kubernetes mode, metrics, and test autoscaling.
Configure Encrypted Off-Site Sync Jobs in Proxmox Backup Server 4.2
Set up encrypted off-site sync in Proxmox Backup Server 4.2, tune parallel workers, verify backups, and test a full disaster recovery restore.
How to Use S3-Compatible Storage with Proxmox Backup Server 4.2
Learn how to use the S3 datastore with Proxmox backup server 4.2. Set up the endpoint, size the cache, watch request stats, and test restores.
bpftrace Troubleshooting: Find Slow CPU, Disk, Syscalls, and Network
Learn Linux performance troubleshooting with bpftrace. Go from top, iostat, and ss to short scripts that find CPU, disk, syscall, and network delays.
How to Fix Ceph HEALTH_WARN and HEALTH_ERR on Proxmox VE
A simple Proxmox Ceph troubleshooting runbook with commands and a safe order to fix OSD, PG, and monitor issues.