Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I think, you could have a look at the official perldoc to get information about Perl's regular expressions:

perlretut - Tutorial

perlrequick - Quick Reference

perlre - Regex documentation

And not to forget the pcre man pages:

If you want/have to stick to pcregrep, I suggest something like:

pcregrep -v "^[^:]*:[^:]*:-?(1?\d?\d|20[0-4]):" /etc/passwd

It (simplified) assumes/uses:

  • the pattern is anchored at beginning of line (^)
  • "login name" field must not contain a colon
  • "password" field must not contain a colon
  • "UID" field:
    • leading optional "-"
    • grouped alternatives:
      • number between 0 and 199 OR
      • number between 200 and 204
  • don't care about the rest of the line

In reply to Re: pcre grep by linuxer
in thread pcre grep by siffland

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others romping around the Monastery: (3)
    As of 2018-01-23 18:26 GMT
    Find Nodes?
      Voting Booth?
      How did you see in the new year?

      Results (252 votes). Check out past polls.