Linux

list of commands

1. ls - list dir
2. chmod - change modification
3. useradd - add user
4. groupadd - add group
5. usermod - user modify
6. su - switch user
7. passwd - set password
8. touch - update last time file
9. pwd - print wokring dir
10. cd - change dir
11. cat - show content of file
12. mkdir - make dir
13. chown - change membership
14. env - show veriables
15. rm - remove
16. cp - copy
17. mv - move

To update on github

18. git add file name
19. git commit -m"meaning full message"
20. git push -u origin master