I met a problem in using grep -P.

There is a text file, temp.txt, whose content is:
dddd
abc

I ran the command:

grep -P "\s*abc" temp.txt

The result I expected is:
abc

But, the actual result is:
dddd
abc

Could anyone tell me what is wrong?

Thanks.

\s in perl includes \n so the pattern matches dddd\nabc

Depending on your requirements you could do a "^\s*abc" or "\w*abc"

Got it. Thanks.