whatis file indexes all of the articles the man command can find.

man uses “more” to page files. Can something else be used?

Solution:

By default man will use “more” to display items one page at a time. However, you can view man pages using other editors if you set your PAGER environment variable to the editor or pager desired. For example, in ksh, to use the page command:

 export PAGER=/usr/bin/pg 

Enter catman -w to create the /usr/share/man/whatis file.