You can verify that by using regular expressions.

while (<>) {
    if (! m#^name:some_name,version:some_number,date:xx/xx/xx$#) {
        warn "Line $. doesn't fit\n"
    }
}
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Of course you need to change the RE to fit your needs.

while ( <> ) {
    m{
        name:[\w\.\-\s]+
        ,
        version:(?:\+|-)?\d*\.?\d*
        ,
        date:\d{2}/\d{2}/\d{2}
    }x or print "Does not match on line $..\n";
}
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You can check out perlre (or just perldoc perlre on must Unixy-type OSes) to find more information on what the different parts of that mean.

One approach would be to look at every line of the file and inspect that that line matches. A Perl program to inspect a certain line of a file would be:

use strict;
use Tie::File;

my $f = shift;
my $l = shift -1;

tie my @f => 'Tie::File' => $f;
print "$l: $f[$l]";
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Save that program as a file and then invoke it for every line:

perl -w gfarhat.pl testfile.txt 1
perl -w gfarhat.pl testfile.txt 2
...
perl -w gfarhat.pl testfile.txt 9998
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You can golf the above program into the following, if the overhead of creating a Perl program is too much for you:

perl -nle 'BEGIN{$l=pop}print if $.==$l' testfile.txt 1
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perl -ne'm|name:\w+,version:\d+,date:\d\d/\d\d/\d\d| 
or warn "$.:Malformed line: $_\n"' thefile
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