How does which command work Linux?

Related questions

1. What is USR in Linux?
2. What is TID on stress test?
3. What is Pthread_exit?
4. What is ThreadId?
5. What is Pid_t in C?
6. How do I run a Pthread program in Linux?
7. What is ischemic dilation?
8. What is soft and hard limit in Linux?
9. What is a normal heart lung ratio?
10. What is Pthread_self?

Tags

1. #owners
2. #command
3. #created
4. #interpreter
5. #directory
6. #superficial
7. #commands
8. #current
9. #directories
10. #level
11. #typing
12. #known
13. #respective
14. #files
15. #along
16. #working
17. #displays
18. #permissions
19. #talks
20. #kernel