Changing position using a search string (regular expression)
If you don't know the number or position of the line you want to
make your current working line, you can locate a string (or regular expression) in the line. To search forward
for one or more words or a string of characters, enter:
/regexp/
where regexp is one or more words or a string of characters.
The line containing the search string is displayed and it is now your
current working line.To search backward for one or more words or a string of characters,
enter:
?regexp?
where regexp is one or
more words or a string of characters. The line containing the search
string is displayed and it is now your current working line.