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## Exercises

  1. Write a shell program to print a file in PostScript using Emacs.

  2. Generate help text with M-x apropos, and uuencode it without using intermediate files.

  3. Write a program in your ~/.emacs to run chmod on it to make it writable with the equivalent command line command chmod a+x < file>. When this is finished, make sure to call (revert-buffer t t).n it, which makes sure that the current buffer and filesystem are the same. Also make sure to (save-buffer) before doing this command!

  4. Using dired, come up with a list of key sequences that would move all PostScript files (ending with .ps) from the current directory to a subdirectory named old if old does not yet exist.

  5. Write a command to print a file with PostScript and zebra stripes.

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