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$now= "Todays date: " . `date`; # sets $now to be the specified label followed by the result of shell's date command
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| 2 |
`who` would naturally return a set of lines and the result can be stored in an array -- one array entry for each output line
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| 3 |
Both system and backquote mechanism invoke a shell command which normally share standard input, standard output and standard error with the Perl program
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| 4 |
This can be reset as for instance in
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| 5 |
`rm fred 2>&1`; # using shell syntax to send standard error to same place as standard output
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