(1) Basic linux knowledge

(1) Basic linux knowledge

Finally, I learned about the kernel!

1. What is the difference between a Unix system and a Unix clone system?

2. What is the term "Power-based LInux?

A: Linux runs on a Power or PowerPC processor.

3. What is a user space? What is the kernel space?

A: user space: users use the user space to deal with the operating system.

Kernel space: the zone where the hardware management function works.

4. What is the interface for a user space program to access the kernel?

A: applications developed or used by programmers are also located in the user space. User space cannot directly access the kernel (and thus cannot access hardware resources), but it can be accessed through the kernel-defined outermost routine-system call.

5. What is the connection between user UID and user name?

A: the user logs on with a unique account name. It can also be associated with a unique user ID. The kernel uses this UID to verify the user's file access permissions. For example, a Super User or root user is a special user with no permission restrictions. The UID is 0.

6. How does one list objects associated with users?

7. list various file types supported by Linux?

8. Is shell part of the operating system?

A: shell is not a component of the operating system. It is the main user interface for interacting with the operating system. Shell is a command interpreter.

9. Why file protection and file mode?

10. list the types of information in the structure of the metadata stored in the file?

A: all information about the file

11. What are the fundamental differences between character devices and Block devices?

12. Which component makes the Linux kernel a multi-process system?

13. How can a process become the parent process of another process?

14. What are the similarities and differences between the file tree and the process tree?

15. Is the process ID associated with the user ID?

16. What is the role of assigning process priorities? Can all users change the priority of a process? Why?

17. Is the device driver only used to add hardware support?

18. Why can Linux be transplanted between different architectures?