commit b52b10

2026-08-13 23:18:29 Niklas Polke: Added usr directories descriptions

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`linux/linux directory structure.md` ..
@@ 7,4 7,10 @@
	/var/ # variable application and system data (e.g. cache, tmp, database) - variable
	/var/log/otterwiki/ # system and application log files - log
	/run/otterwiki.sock # runtime data since boot (e.g. sockets, locks) - exist only until the next reboot - run
+	/usr # system-wide applications and data
+	/usr/bin # user commands and programs
+	/usr/sbin # system administration commands
+	/usr/local # locally installed software
+	/usr/local/bin # locally installed user programs
+	/usr/local/sbin # locally installed admin programs
	```