The following code exists and the fork prints "Hello World" after the required 5 sec. 

use strict   ;
use warnings ;

my $cmd = 'sleep 5; print "Hello World\n";' ;
my $pid = fork();
if (defined $pid && $pid == 0) {
    # child
    
    eval $cmd;
}                

exit 0;

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OS, Perl version and details on the command you are trying to execute might help

In reply to Re: eval a command by tmharish
in thread eval a command by Xantara

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