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.
- 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
- Shut Down Linux After a Set Time
Core topics
Linux administration, shell commands, Oracle and PostgreSQL, networking, filesystems, permissions, operational cleanup and engineering notes from real systems work. Browse all notes →