"Linux Commands" Linux common commands

The purpose of the system creation is to manipulate the file

1, Linux: See everything is a file

2. PWD View current path

3, "/" on behalf of the root directory, CD (chage directory) Replacement directory

4, how to view the root directory of files and disk? LS View the current directory of files or directories, Ls-l: View details, the size of the details in bytes to represent the size, ls-lh:h (human) represents the user-friendly display, Ls-lha: Hidden file humanized display

5, how to determine whether it is a file or directory? "D ..." begins with a directory,

6. Ls-a: Show hidden files

7. Vim. Test to create a hidden file

8. Vim file name, press "I" button, then enter content, then press Esc key, enter double colon +wq button, save exit

9, view the contents of the file two ways: Cat file name more file name: Enter can be viewed in one line, the Space page by page to look over

10. Create Directory: mkdir

11, MV file 1/(the directory can also be moved), the file will be deleted file 1, if the directory file will be placed under the file 1 below

12, create the directory can be recursively created mkdir-p shandong/heze/danxian/yanglouzhen/liuzhaicun/t/t for recursion

13. Tree Shandong View trees structure, directory organization

14, man view the command's document command--help simple view Help

15. Help command to view Linux built-in commands

16. grep Find Code

17, Tar zcvf demo.tar.gz Linux.log demo own definition name, tar.gz usual habit Linux.log will pack into demo.tar.gz

18, sz demo.tar.gz download package

19. Df-h Disk Utilization

20, Du-sh the current directory size

21, Free-m server memory, the last value of the second row indicates the server's remaining memory

22. Top command on the server to see which program compares memory consumption

23, the current server IP address: IP A can be displayed

24. Add System User Useradd Boy

25, modify the file belongs to the group chown boy.boy file name User (owner). User group (genus Group)

26, rwxr-xr--R=read 4, W = write 2 x = Excute 1 Execute, three a group of RWX user rights,-XR user group permissions r--other permissions, General folder permissions 755

27, chmod Modify Permissions

28, command line switch user Su-user name

29. CPU:

User: The CPU that the process takes up

System: CPU of the operating system itself

Idle:cpukongxianlv

Iowait:cpu time to wait for IO than

30. Kill Process Number elimination process

31. rm File Delete File

32, Mem (memory):

Total: All memory

Usage: Memory usage

Free: Memory Idle

Cached: Caching

Buffered:

33. Find/-name *list* fuzzy Search

34, Find/-size 80m | Xrang LS-LH

"Linux Commands" Linux common commands