


                I am connected to the Unix/Linux server and I have
                a command prompt: (the default prompt is $)
                
                
                $ <command><whitespace>[option]<whitespace>[args]
                                
                
                whitespace -> spaces, tabs, new lines
                [ ] <= optional  
                
                Options start with '-'
                Args do not start with '-'
                
                $ cal  <- no options, no args
                $ cal -j  <- 1 option no args
                $ cal -3 -j <- 2 options (notice the whitespace)
                $ cal -j3 <- 2 options (compressed on the line)
                $ cal 2022  <- no options 1 arg
                $ cal 12 2022 <- no options 2 args
                $ cal -3 12 2022
                
                
                
                ls -a -l
                ls -al
                
                
                
                
