chrony Not Syncing? Troubleshooting Time Sync on Linux
Fix chrony not syncing on Linux: read Not synchronised, 506 and 0 sources online errors, check the daemon,…
Read tutorial →Linux
Browse step-by-step tutorials in this topic.
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…
Read tutorial →
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.
Read tutorial →
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.
Read tutorial →
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.
Read tutorial →
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.
Read tutorial →
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.
Read tutorial →
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.
Read tutorial →
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…
Read tutorial →
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…
Read tutorial →