Warning: If you are not careful you might change a file and your
system might not work later!.

Always make a backup copy of the file before you start editing.

     cp filename filename.bak
	 
/usr/foxbin/bpatch filename

     ? = Help page

     h go to hex area               
     a go to Ascii area
	 
Once you are in the desired section (ascii or hex), use the arrow
keys to go to desired BYTE.

If the arrow keys do not work try:
     CTL-H (Left), CTL-J (Up), CTL-K (Down), CTL-L (Right)

If you already have modified some bytes while trying to move the cursor,
type "Backspace" (or "Delete") to go back, then "q" to quit, and start
all over after you learned which keys work to move cursor.

      exit Ascii or hex  (Try also: "Del", "CTL-Del")
     w write file to disk
     q exit file (w first or wq)    
     q quit no write
      go down a page         
     \ back up a page
     / str. search for ASCII string 'str.'
     nnn  go to page with byte nnnŠ.pa