"Everything is a file" in UNIX
25:09
Learning the Linux File System
34:45
1.6 Everything is a File
45:16
Unix system calls (1/2)
52:06
A Personal History with Linux and BSD Unix
9:00
The (Actual) UNIX Philosophy
5:16
Unix Pipeline (Brian Kernighan) - Computerphile
21:24
Signals. I spent 2 years to understand this part.
44:21