ed3.help - syntax of commands

Syntax
command   - do it to the current line(s) (except w=write file)
n command - do it to line n
n,m command - do it lines n thru m
/xxx/ command - do it next line with xxx in it
?xxx? command - do it previous line with xxx in it
g/xxx/ command - do it to all (globally) lines with xxx in them
v/xxx/ command - do it to all (globally) lines with no  xxx in them
/xxx/,/yyy/ command - do it to lines from a line xxx to the next line with yyy

Special Symbols used in addresses in 'ed'
.	The 'current line (just printed,...)
+,-     Indicates adding and subtracting numbers (/xxx/+1 is ok!)
'x	number of the line marked as x
$	the last line in the file, also (if last in string) end of line

^.*$[]  Parts of regular expressions describing slected strings.
	Use 'help regular' to find out more.

Read the Manual for more! - 'man ed' and 'man grep'.