Greetings again all of you good monks.

I am attempting to set up a very simple Perl app using the 'who' command in Unix.

Basically I want to set up a simple hash using somthing like: 

my %who=('who -q');

[download]


I would then like then like to set each of the returned usernames as keys for the hash and have the values in the hash show the number of sessions that a user is logged in.

The read out would look something like: 

Beckysue is logged in 1 time.
Billybob is logged in 3 times.
BubbaJoe is logged in 2 times. 
Saranne  is logged in 1 time. 
<br><br>
ect...

[download]


I have a strong urge to try the functions keys(%hash) and values(%hash) but I think I also might be haveing problems passing data from that 'who' command.



Thank you in advanced, I am trying to learn Perl from my home in Beijing with very limited help in meatspace. I have been ramming my head into the desks for the last few hours and the this is upseting the little old lady nextdoor. If anyone can offer a hint, you would be my hero for the day (or night).

2006-10-02 Retitled by planetscape, as per Monastery guidelines

( keep:0 edit:7 reap:0 )

Original title: 'Perl in Unix question'

In reply to parsing output of UNIX `who` command by chinamox

Title:
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, details, 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, summary, 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.