Linux find Command: Complete Guide with Real-World Examples
The Linux find command is one of the most powerful tools in a sysadmin's toolkit. It searches directory trees ...
How to Generate a CSR (Certificate Signing Request) with OpenSSL
A Certificate Signing Request (CSR) is required when purchasing an SSL/TLS certificate from a Certificate Authority (CA). It contains ...
How to Change the Hostname on Linux (AlmaLinux, CentOS, Ubuntu)
Changing a server's hostname is a common task after provisioning or when reorganising infrastructure. This guide covers the correct ...
Bidirectional File Sync with Unison: Installation and Usage Guide
Unison is a bidirectional file synchronisation tool that can sync two directories — locally or over SSH — propagating ...
How to Set Up SSH Key-Based Authentication on Linux (CentOS/AlmaLinux)
SSH key-based authentication is more secure than passwords — it's immune to brute-force attacks, required for automated deployments, and ...
Installing Zimbra Mail Server on CentOS 7 / AlmaLinux
This guide covers installing Zimbra Collaboration Server on CentOS 7 / RHEL 7. Note: Zimbra 8.6 is EOL. The ...
How to Log All SFTP Transactions to a Dedicated Log File
Logging all SFTP file transfers is essential for security auditing, compliance, and troubleshooting accidental overwrites or deletions. By default, ...