How to give a pattern for new line in grep?

Question

How to give a pattern for new line in grep? New line at beginning, new line at end. Not the regular expression way. Something like \\n.

Answer 1

You can use this way...

grep -P '^\s$' file

• -P is used for Perl regular expressions (an extension to POSIX grep).
• \s match the white space characters; if followed by *, it matches an empty line also.
• ^ matches the beginning of the line. $ matches the end of the line.