To run the shell, follow these steps:

    make
    ./shell

• Builtin commands: ls, cd, pwd, echo
• Support for background and foreground processes
• Redirection and piping support
• Signal handling
• Additional commands

• clock -t [time interval] Dynamic clock where the time interval is in seconds.

• pinfo Displays currect processes and their information.

• remindme [seconds] [message] Displays a given message after a given time interval.

• setenv [var] [value] Sets an environmental variable to a given value.

• unsetenv [var] Unsets a given environmental variable.

• overkill Kills all running processes.

• jobs Lists currently running processes.

• kjob [job number] [signal number] Sends a signal to a specified job.

• fg [job number] Puts a specified job in the foreground.

• bg [job number] Changes a stopped job number to a running background job.