A.df this command allows user to see how much disk is available in the system

 

B. cal this command allows user to see the calendar based on computer configuration

C. free allows the user to see how much memory is available in the system

D. cd allows the user to access a specific directory

E. pwd allows user to see in which directory there in

F. ls  user can see the list file and it directory ls- a let you see the file

G. file  let the user to see what type are file it is

H. less  lets the user  read file text file preferred