pseudecode person_full_name = 'sss' person_first_letter = S
1 get the phonebook 2 open the first page start looking for the letter {person_first_letter} 3 search for {person_full_name} Number 4 store the num in variable 5 print Hossam's number
directory = folder
- pwd print working directory
- cd change directory
- ls list
- touch create file
- rm remove for files
- rm -r for directory remove