Linux — Foundation of Everything

Every system engineer starts here. Linux is not just the OS — it is the environment in which everything else runs.

This category documents everything learned about Linux internals, administration and troubleshooting on RHEL 10.

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What this category covers

Topic	Status
Users, groups, permissions	✅
systemd — units, services, journal	✅
Networking basics — ip, ss, firewall-cmd	✅
LVM — logical volumes, snapshots, extension	✅
Memory — RAM, swap, OOM killer	✅
Processes — ps, strace, lsof, signals	✅
Kernel & sysctl — /proc, /sys, tuning	✅
Bash scripting advanced	⏸
SELinux advanced	🔄

Posts in this category cover Module 01 — Linux Fundamentals and Module 06 — Linux Internals of the syseng-journey roadmap.