Shell Scripts (Linux)

Write a script called vitest which uses a here document to send several lines of text into a vi session. The script will have one mandatory command line argument which will be the name of the file that vi will open (e.g. You would type vitest file1.txt to invoke the script). If the user does not give the mandatory argument, echo out the usage for the script and exit. You will need to send an 'i' (insert mode), two lines of text and ESC ZZ (hit CTRL-v and ESC to insert an ESC character) to exit for your here document. Exec vi using the here document as input.