You Should Know this Shortcuts.

 

Here are some commonly used keyboard shortcuts:

1. Ctrl + C - Copy
2. Ctrl + V - Paste
3. Ctrl + X - Cut
4. Ctrl + Z - Undo
5. Ctrl + Y - Redo
6. Ctrl + A - Select all
7. Ctrl + F - Find
8. Ctrl + S - Save
9. Ctrl + N - New document/window
10. Ctrl + O - Open
11. Ctrl + P - Print
12. Ctrl + B - Bold
13. Ctrl + I - Italic
14. Ctrl + U - Underline
15. Ctrl + T - New tab(Web browser)
    
16. Ctrl + W - Close current tab/window(web browser)
    
17. Ctrl + Shift + T - Reopen the last closed tab(Web browser)
18. Ctrl + Shift + Esc - Open task manager (Windows)
19. Ctrl + Alt + Delete - Open task manager (Windows)
20. Alt + Tab - Switch between open windows
21. Windows key + D - Show desktop
22. Windows key + L - Lock screen
23. Windows key + E - Open File Explorer
24. Windows key + R - Open Run dialog box
25. Windows key + S - Open search bar (Windows)
26. F1 - Open Help menu
27. F2 - Rename selected file/folder
28. F5 - Refresh
29. Ctrl + Shift + N - Create new folder
30. Ctrl + Shift + Esc - Open task manager (Windows)

Note that some of these shortcuts may vary slightly depending on the operating system or application you're using.