Sed and AWK hints

Eric Pement's Awk page includes awk use and awk one-liners, among others.

His SED page is here as well.

VI hings

search and replace--including matched regex. & character is replaced by matched string. E.G.

:s/abc/&fred/
replaced abc with abcfred 
:%s/^[^ ]*/\'\'&\'\'/
Replaces the first word (beginning of line to first space) with the same word encapsuled by two single quotes: 
Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
Morbi pharetra purus eu nisl.
Nunc faucibus ultricies erat.
Aliquam sodales arcu nec arcu.
Aliquam vulputate nisl id tortor.
Aliquam molestie convallis lorem.
becomes 
''Lorem'' ipsum dolor sit amet, consectetuer adipiscing elit.
''Morbi'' pharetra purus eu nisl.
''Nunc'' faucibus ultricies erat.
''Aliquam'' sodales arcu nec arcu.
''Aliquam'' vulputate nisl id tortor.
''Aliquam'' molestie convallis lorem.