Systems, Linux and Database Notes
GNULinuxClub is a personal collection of practical notes on Linux, Unix, databases, command-line tools and engineering troubleshooting.
The focus is useful technical reference: commands, fixes, database issues, migration thinking and small engineering lessons that are easy to forget.
Start here
- Linux Troubleshooting — boot, filesystems, storage and practical fixes.
- Command Line — useful Linux and Unix command notes.
- Linux Basics — filesystems, permissions and core concepts.
- Networking — DNS, SSH, Samba, interfaces and network tools.
- Database Notes — Oracle, PostgreSQL and troubleshooting notes.
- Engineering Notes — migrations, support and systems thinking.
- Systems Administration — packages, services, storage and security.
- All Notes — browse the complete cleaned technical archive.
Recent notes
Recent posts from the technical notes collection.
- AWS ECS vs EKS: Simplicity vs Cloud Portability — Which Should You Choose?
- Who Thought Banks Would Move from Oracle to PostgreSQL?
- Back Up an Oracle Schema with Data Pump
- Recover or Reinstall the GRUB Bootloader
- Download Files from a Directory with wget
- How to Check Directory Size in Linux Using du
Core topics
Linux administration, shell commands, Oracle and PostgreSQL, networking, filesystems, permissions, operational cleanup and engineering notes from real systems work. Browse all notes →