Linux classroom commands

Linux classroom commands-general Linux technology-Linux technology and application information. For details, refer to the following section. Producer: Ning Chunyan? (String) _ (Space)

1. Command-input (a c r o s I) a, I commonly used

2. Command-last line (:)

3. Return to command mode ESC

4. mkdir _/directory (create directory)

4.1 rmdir/rm _/directory /? (Delete a directory or/file)

4.2 rm _-r _/directory (delete all files under this directory)

4.3 rm_abcd ?, Rm_a *

4.4 mv _? 1 _? 2, mv _? _/Directory, mv _/directory (move or change the file name)

4.4 cp (copy a file)

4.5 cp _-r _/directory

5. touch _? 1 _? 2 _? 3 ...... (Create a file)

6. vi _? (Open a file)

7.: q! : Wq (exit, strong retreat, save and Exit)

8. PAGE63

9. yy (copy), p (paste)

10 .:/? (Forward search ):?? (Reverse search) n (Continue search)

11. v (visual mode, mainly used for multi-row replication)

12. PAGE68/69, for example, 3, 5 W _? (Copy the content of a file to another file)

13.: 1, $ _ s /? 1 /? 2/g (? 2 content replacement? 1 content, g replace all)

14. PAGE70, dd (delete a row), x (delete a character)

15. vi _-o _? _?, Vi _-O _? _? (Horizontal split, Vertical Split display file)

16. PAGE73 (let's take a look)

17. PAGE104! Ls, ls _-l (long file), LL, ls_a (hidden file), ls_al (Query file information in the current directory), ls _/, ls _ directory, ls _ -- ver, dir

18. ls _ parameter | grep _? (View include? Directory or file)

18.1 clear (clear screen), date (display date)

19. man _ command, command _ -- help,-h, help _ command, info _ command (view command parameters)

20. q, ctrl + z, ctrl + c (exit parameter view), enter, space, ctrl + q (same as alt + f4 in windows ),

20.1 yelp (equivalent to win Help and Support)

21. history (view history commands. The default value is 1000)

22. R (read permission) W (write) X (execution)

23. root (who owns it), root (which group belongs)

24. Blue (directory), Green (executable), red (system), light blue (connection)

25. halt (shutdown), init _ 0, shutdown-h (time)

25.1 reboot (restart), init_6

26. ALT + F2, ALT + F3 ............ ALT + F6 (open multiple virtual interfaces)

27. TAB (file name completion)

28. pwd (view the current user location)

29. du _?, Du _-s _/directory (view the file, the directory's capacity)

30. cd _/directory (change working directory) cd ~, Cd (return to the root working directory ),

Cd ~ Username, exit (exit Terminal)

31. file _? (View File Types)

32. tail _?, Head _? (Display the last/first lines of the file)

33. mount _/dev/cdrom, cd _/mnt/cdrom (mount the file system/hardware and enter)

34. umount _/mnt/cdrom (unmount)

35. PAGE101, find _. _-name _ "y *. *" (search for files starting with y in the current directory)

36. grep _? _ File name

37. cat _? (View File Content)

38. less _? (View the file content, B flip the page, 0-then p, view by file percentage)

39. PAGE112, useradd _? (Add user), passwd _? (Add password)

40. PAGE104, Set permissions

41. su _ User Name (switch user, but do not change permission/environment)

42. su _-User Name (switch user, change permission/environment)

43. chmod u + r, g + x/user

44. ls-ld/directory (view directory permissions)

45. gpasswd-a/-d/-r username group name

-A: Add a specified user to the group.

-D. delete a specified user from the group.

-R: Delete the group password.

Set the group password by using the gpasswd command when no option is used

46. chmod o + w/directory/file name

47. chown user name/directory/file name

48. chown-R user name/directory

49. groupadd group name

50. useradd-g group name username, userpsswd/passwd _ % username % (Change User Password)

Cat/ect/passwd | grep User Name

51. userdel-r user name

52. groupdel group name

53. groupmod group name

54. vipw/etc/passwd (manually modify the user configuration file)

55. vigr (manually modify the group configuration file)