System call
a programmatic way which allows the program requests a service from the kernel of the os
5 categories:
- process control
- file manipulation
- device management
- information maintainance
- communication
https://www.youtube.com/watch?v=lhToWeuWWfw&list=PLBlnK6fEyqRiVhbXDGLXDk_OQAeuVcp2O&index=9
https://www.youtube.com/watch?v=EavqupVh8ls&list=PLBlnK6fEyqRiVhbXDGLXDk_OQAeuVcp2O&index=10