Question: The one-liner should:

* solve a real-world problem
* not be extensively cryptic (should be easy to understand and reproduce)
* be worth the time it takes to write it (should not be too clever)

I'm looking for practical tips and tricks (complementary examples for `perldoc perlrun`).

Answer: 
Please see my slides for ["A Field Guide To The Perl Command Line Options."](https://web.archive.org/web/20120916013412/http://petdance.com/perl/command-line-options.pdf)
Here is one that I find handy when dealing with a collection compressed log files:

```
   open STATFILE, "zcat $logFile|" or die "Can't open zcat of $logFile" ;

```