public static boolean isUnix(){
  return (OS.indexOf("nix") >= 0 || OS.indexOf("nux") >= 0 || OS.indexOf("aix") > 0);
}

public static boolean isUnix ( ) { return ( OS . indexOf ( "nix" ) >= 0 || OS . indexOf ( "nux" ) >= 0 || OS . indexOf ( "aix" ) > 0 ) ; }
checks if is unix .
