List of    ed     commands
a	insert After the current line  (until a . on its own)
c	change lines and input new text (until . on its own)
d	delete the line or lines
e	enter a new file/edit that file
f	filename  - print it or change it.
i	insert before the first of addressed lines(until . on a line)
k	Keep note of this line (as in ka, kb, kc, ), mark this line
l	list with tabs shown as >, BS as < CR as $
m	move lines to line after this line (including m0 - move to start)
p	print line  ( can also be put after a substitution to see the result)
q	quit (a ? means that you haven't saved your file...do it again)
r	read a file after the the addressed lines
s	substitute  --  s/old/new/ s?old?new?  etc. & is special in new!
t	transpose to other line - actually it puts in a copy!
u	undo the last s
w	write current file out (or addressed part of file), save it
=	print the number of the lines
!	obey this unix(shell) command   -  !ls or !pwd



Try 'help ed3' to see more syntax and special symbols.