system("/usr/local/share/ca-certificates/; sudo update-ca-certificates; sudo systemctl restart docker.service");
system("sh", "script.sh", "--help" );
system("sh script.sh --help");
exec("vi abc.txt");
$cmd_msg = `ls -l`;
$cmd_msg = `sudo apt update -y 2>&1`;
$cmd_msg = qx/script.sh --option/;