Servers

#Docker· October 29, 2026·11 min read

How to Inspect and Clean Docker Containers and Images Safely

List Docker containers and images, check mounts and rollback needs, choose targeted removal or pruning, and diagnose disk space that stays full.

#Security· October 29, 2026·9 min read

UFW Firewall Rules for SSH and Web Hosting

Set UFW rules for SSH, HTTP and HTTPS on an Ubuntu VPS. Preserve remote access, test new connections, and spot Docker or cloud firewall exceptions.

#Security· October 29, 2026·12 min read

Secure SSH Access to a VPS Without Losing Your Login

Harden SSH on an Ubuntu or Debian VPS with key-based admin access, effective-config checks, firewall choices, and a safe apply, test, and rollback sequence.

#Security· October 29, 2026·15 min read

TLS Certificates on Linux: Set Up Certbot and Verify Renewal

Choose an ACME method, install Certbot on Ubuntu/Nginx, verify the public HTTPS certificate, and test renewal, deployment, and expiry monitoring.

#Security· October 29, 2026·17 min read

Isolate WordPress Sites on One Server with Separate PHP-FPM Pools

Separate WordPress PHP users, pools, sockets, files, and databases on one Ubuntu VPS. Includes staged migration, rollback, and two-way access tests.

#Operations· October 29, 2026·9 min read

How to Read Linux Server Logs When a Website Fails

Trace a failed website request through NGINX or Apache logs, journalctl, PHP-FPM and proxy evidence. Find the right source before changing your server.

#Operations· October 29, 2026·9 min read

Linux Crontab Guide: Syntax, Examples, and How to Check Jobs

Use crontab every 5, 10, or 15 minutes, check user and system syntax, and troubleshoot cron logs, exit codes, and task output.

#Operations· October 29, 2026·9 min read

How to Manage Linux Services with systemctl and Read Their Logs

Manage Linux services with systemctl: choose start, restart, enable, or reload, inspect unit-specific journal entries, and confirm application behavior.

#Operations· October 29, 2026·11 min read

How to Find Large Files and Check Disk Usage on Linux

Check the affected Linux filesystem, trace large directories and files, distinguish inode and Docker usage, and verify recovery without unsafe cleanup.

#Operations· October 29, 2026·14 min read

Linux VPS Backup and Restore Checklist

Inventory files, databases, and volumes, compare backup methods, and use a recovery acceptance record to check whether your Linux VPS can be restored.