Docker in Production: Volumes, Networks, and Compose Secrets
Moving Docker from development to production requires thinking carefully about data persistence, network isolation, and secret management. This guide covers production‑ready patter...
Full Disk Encryption with LUKS and TPM2 on Linux
LUKS full disk encryption protects your data at rest, and pairing it with TPM2 allows passwordless unlocking on trusted hardware. Walk through the full setup from scratch.
Hardening Your SSH Server: Beyond Password Authentication
A default SSH configuration is often the weakest point in a Linux server's security. This guide covers key‑based authentication, fail2ban, port knocking, and essential SSHD configu...
Podman Rootless Containers: The Secure Alternative to Docker
Run containers without root using Podman: user namespaces, subuid setup, ports, volumes, Compose, and Quadlet units that start your containers at boot.
Setting Up WireGuard VPN on a Linux Server
Set up a WireGuard VPN server on Linux: key generation, server and client configs, IP forwarding and NAT, firewall rules, and how to troubleshoot a tunnel.
LVM Deep Dive: Logical Volume Management for Flexible Storage
Learn LVM step by step: physical volumes, volume groups, logical volumes, growing filesystems online, snapshots, moving data between disks and LVM on LUKS.
Systemd Units Explained: Services, Timers, and Sockets
A practical guide to systemd units: writing service files, replacing cron with timers, socket activation, drop-in overrides, logs and sandboxing.
Writing Robust Bash Scripts: Error Handling and Best Practices
Write Bash scripts that fail safely: strict mode, quoting, ERR and EXIT traps, temp files, argument parsing, locking, and ShellCheck, with tested examples.
Mastering `find` and `xargs` for Powerful File Operations
Practical find and xargs recipes: match by name, age, size and permissions, handle spaces with -print0, use -exec +, prune folders, run jobs in parallel.