Notes
Short technical notes from the people who build Teach Zone.
Move from basic process inspection to practical performance analysis with ps, top, pidstat, perf, load average, memory metrics, and systemd tools.
Learn how to investigate Linux storage performance with iostat, vmstat, pidstat, fio, df, and mount information before changing filesystem or kernel settings.
A practical network troubleshooting workflow using ip, ss, ping, curl, dig, traceroute, and systemd tools, starting with the local machine and moving outward.
Learn how to inspect, start, stop, enable, troubleshoot, and create systemd services without turning service management into trial and error.
Understand Linux ownership and permission bits through practical examples, including chmod, chown, groups, umask, and safe troubleshooting.
A calm introduction to the Linux command line: navigation, files, permissions, processes, packages, and a few habits that make the terminal less intimidating.