Posted August 3, 2011on:
i have always felt grep’s regular expression pattern a bit different than expectation.
here is an example:
the line format i am looking for is “number/number\tstuff\tstuff\etc”
I used ‘[0-9]+/[0-9]+’ to search through all the lines for the above format, to no avail. It found nothing.
Out of desperation, I tried ‘[0-9]/[0-9]’ as the pattern on command line and grep is returning all the lines — it is not returning all the lines with a single digit number as i was thinking at all.