Basic command Linux

1. pwd command
2. cd command
3. ls command
4. cat command
5. cp command
6. mv command
7. mkdir command
8. rmdir command
9. rm command
10. touch commamd
11. locate command
12. find command
13. grep command
14. sudo command
15. df command
16. du command
17. head command
18. tail command
19. diff command
20. tar command
21. chmod command
22. chown command
23. jobs command
24. kill command
25. ping command
26. wget command
27. uname command
28. top command
29. history command
30. man command
31. echo command 
32. zip, unzip command
33. hostname command
34. useradd, userdel command
35. vi command
36. sudo command
37. lscpu command
38. lsblk command
39. df -h command
40. free -m command
41. exit command
42. clear command