How do I run a programme?

As in MS-DOS, simply type the name of the programme along with any parameters, and press the enter key. Unlike MS-DOS, your shell will only look in the PATH for the programme, so if '.' (current directory) is not in $PATH the shell will be unable to find the programme.

You can either tell the shell where to find the programme by specifying the pathname (eg ../../usr/local/bin/foo or ./foo), or add the directory that contains the programme to the path. (Hint:export PATH=$PATH:/new/path)