system(q{bash -ic 'untouchable john mike bill'});

##</code><code>##

system('bash', '-ic', 'untouchable john mike bill');

##</code><code>##

use String::ShellQuote qw( shell_quote );
system('bash', '-ic', shell_quote('untouchable', @names));

##</code><code>##

system('bash', '-ic', 'untouchable "$@"', '-', @names);