title: Unable to open h2.jar on mac
body: <p>I' trying to build an H2 database for my java application, and I think it's working but I can't execute the .jar file to see if it's working or not........ I'm doing this with my friend he has a mac to and it's working well for him, we have the same java version</p>
  
  <p>I've tried by double clicking on the .jar and I've tried to open it with the command line</p>
  
  <p><code>java -jar h2-1.3.170.jar</code> and it showed me that exception</p>
  
  <pre><code>IO Exception: "java.net.UnknownHostException: dhcp-10-231-195-255: dhcp-10-231-195-255: nodename nor servname provided, or not known" [90028-170]
  
      at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
      at org.h2.message.DbException.get(DbException.java:158)
      at org.h2.message.DbException.convert(DbException.java:273)
      at org.h2.util.NetUtils.getLocalAddress(NetUtils.java:263)
      at org.h2.server.web.WebServer.updateURL(WebServer.java:325)
      at org.h2.server.web.WebServer.init(WebServer.java:315)
      at org.h2.tools.Server.&lt;init&gt;(Server.java:51)
      at org.h2.tools.Server.createWebServer(Server.java:412)
      at org.h2.tools.Console.runTool(Console.java:228)
      at org.h2.tools.Console.main(Console.java:100)
  Caused by: java.net.UnknownHostException: dhcp-10-231-195-255: dhcp-10-231-195-255: nodename nor servname provided, or not known
      at java.net.InetAddress.getLocalHost(InetAddress.java:1438)
      at org.h2.util.NetUtils.getLocalAddress(NetUtils.java:261)
      ... 6 more
  Caused by: java.net.UnknownHostException: dhcp-10-231-195-255: nodename nor servname provided, or not known
      at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
      at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:866)
      at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1258)
      at java.net.InetAddress.getLocalHost(InetAddress.java:1434)
      ... 7 more
  Exception in thread "main" org.h2.message.DbException: IO Exception: "java.net.UnknownHostException: dhcp-10-231-195-255: dhcp-10-231-195-255: nodename nor servname provided, or not known" [90028-170]
      at org.h2.message.DbException.get(DbException.java:158)
      at org.h2.message.DbException.convert(DbException.java:273)
      at org.h2.util.NetUtils.getLocalAddress(NetUtils.java:263)
      at org.h2.server.TcpServer.getURL(TcpServer.java:193)
      at org.h2.tools.Server.getStatus(Server.java:391)
      at org.h2.tools.Console.printProblem(Console.java:300)
      at org.h2.tools.Console.runTool(Console.java:270)
      at org.h2.tools.Console.main(Console.java:100)
  Caused by: org.h2.jdbc.JdbcSQLException: IO Exception: "java.net.UnknownHostException: dhcp-10-231-195-255: dhcp-10-231-195-255: nodename nor servname provided, or not known" [90028-170]
      at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
      ... 8 more
  Caused by: java.net.UnknownHostException: dhcp-10-231-195-255: dhcp-10-231-195-255: nodename nor servname provided, or not known
      at java.net.InetAddress.getLocalHost(InetAddress.java:1438)
      at org.h2.util.NetUtils.getLocalAddress(NetUtils.java:261)
      ... 5 more
  Caused by: java.net.UnknownHostException: dhcp-10-231-195-255: nodename nor servname provided, or not known
      at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
      at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:866)
      at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1258)
      at java.net.InetAddress.getLocalHost(InetAddress.java:1434)
      ... 6 more
  </code></pre>