Perl: where is the command in system("command -v wget") documented?
 

I am a perl beginner. I stambled upon a perl line

if (system("command -v wget >/dev/null 2>&1") == 0)

I was able to find perl's documentation for system. But where is
the documentation for command?
Am I right that that line tests whether wget is installed in the
system? How does it do that?


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