2. 2 $ command Command Line Options ls –a –l hello hi Command Arguments

3.  Most UNIX commands are designed with only four characters  You can easily guess the significance of a command  UNIX commands are sensitive to case  Some commands accepts filenames as arguments  Filenames don’t need to have a file extension 3

4. echo Echo argument on standard output date Display current date (if root, allow date change) banner Prints the specified message as very large characters on the standard output clear Clear terminal screen cal Command used to view the calendar of any specific month or a complete year. bc Command used for character-based calculator exit Terminates the current process and returns control to the previous shell 4 of 17 2

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