The usual (and slightly more compact) way to check a system call is:
system( $cmd ) == 0 or die "System call failed: $!";
The " == 0" deals with the fact that system returns 0/false on success, not true like most perl functions.
If the information in this post is inaccurate, or just plain wrong, don't just downvote - please post explaining what's wrong.
That way everyone learns.
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