Replace whole line when match found with sed

Question

I need to replace the whole line with sed if it matches a pattern. For example if the line is \'one two six three four\' and if \'six\' is there, then the whole

Answer 1

This might work for you (GNU sed):

sed -e '/six/{c\fault' -e ';d}' file

or:

sed '/six/{c\fault'$'\n'';d}' file