System Calls Courses

操作系统原理（Operating Systems）
Peking University via Coursera

Operating System
Indian Institute of Technology Delhi via Swayam

Linux kernel Module and driver Programming for x86
Udemy

Architecture 2001: x86-64 OS Internals
OpenSecurityTraining2 via Independent

Socket Programming in C
Udemy

Linux Course - Engineering, UGC-NET - Ravindrababu Ravula
YouTube