SSH Tunneling and Port Forwarding on Linux: -L, -R, -D and ProxyJump
Learn SSH local, remote and dynamic port forwarding, ProxyJump bastion access, persistent tunnels with systemd, and how to…
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PostgreSQL Install and Secure Setup on Linux (Roles, pg_hba.conf, TLS)
Install PostgreSQL on Linux and secure it: roles, listen addresses, pg_hba.conf rules, TLS, baseline tuning, and backup verification.
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Ansible Roles Tutorial: Structure, Templates and Reuse
Organise Ansible playbooks into reusable roles: directory layout, tasks, templates, handlers, defaults, testing and requirements.yml.
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Nginx Rate Limiting and Security Headers: Hardening Guide
Harden nginx with limit_req rate limiting, stricter login limits, security response headers, TLS settings and version hiding.
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Linux auditd Guide: Audit File Access and Privileged Commands
Configure auditd on Linux to watch critical files, log privileged commands, persist rules and search the audit log.
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Restic Encrypted Backups on Linux: Repository, Retention and systemd Timer
Set up restic for encrypted, deduplicated Linux backups: init, first backup, excludes, retention, systemd timer and restore drills.
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LUKS Disk Encryption on Linux with cryptsetup (Complete Guide)
Encrypt a data disk with LUKS and cryptsetup: format, open, mount, keyfile auto-unlock, crypttab, and header backup.
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WireGuard VPN Server Setup on Linux (Step-by-Step Guide)
Build a WireGuard VPN server on Linux: keys, wg0.conf, NAT and firewall rules, client configs, and peer management.
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Samba File Sharing on Linux (Complete Guide)
Set up Samba on Linux for Windows- and macOS-compatible file sharing: configure smb.conf, create Samba users, and secure…
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NFS Server Setup on Linux (Complete Guide)
Set up an NFS server on Linux: install packages, configure /etc/exports, open the right firewall ports, and mount…
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