Linux Command Memo (CentOS 7)

1. Create directory testdir:mkdir  testdir
2. Enter directory testdir:cd testdir
3. Create empty file in TestDir 1:   Touch 1
4. Create empty file in TestDir 2:   Touch 2
5. Delete file 2:rm 2
6. Delete Empty directory: RmDir dirname
7. Delete Non-empty directory: RM-RF dirname
8. Copy file: CP 1 2 (copy file 1 to file 2)
9. file movement: MV 1 dir (move file 1 to directory dir)
10. directory move: MV dir dir1 (move dir to Dir1 below)
11. back to root directory: CD/
12. return to the current user's home directory: cd ~
13. return to Parent directory CD:
14. list all contents in directory: LS
15. List permission information for all content under directory: Ls-l
16. View your current working directory: PWD
17. Clear Screen: Clear
18. View Ip:ifconfig
19. Switch User: su root (switch to root user)
20. Shutdown: Shutdown (This version I use only the root user can execute shutdown command)
21. Create User: Useradd testuser1
22. Add or change password to the specified user: passwd testuser1 (change password to testuser1)
23. Delete User: Userdel testuser1
24. Create group: Groupadd gtest
25. View the group information for the current User: Groups
26. add a user to a group: Usermod-g gtest testuser1 (add testuser1 to Gtest group

Linux Command Memo (CentOS 7)