在我的VPS上启动selenium独立服务器时遇到麻烦

root@PIV:/usr/share/nginx/pivdev/tests# java -jar selenium-server.jar

输出：

21:53:08.857 INFO - Launching a standalone Selenium Server
21:53:08.911 INFO - Java: Oracle Corporation 24.79-b02
21:53:08.914 INFO - OS: Linux 3.13.0-52-generic amd64
21:53:08.945 INFO - v2.47.1, with Core v2.47.1. Built from revision 411b314
21:53:09.070 INFO - Driver provider org.openqa.selenium.ie.InternetExplorerDriver registration is skipped:
registration capabilities Capabilities [{platform=WINDOWS, ensureCleanSession=true, browserName=internet explorer, version=}] does not match the current platform LINUX
21:53:09.071 INFO - Driver provider org.openqa.selenium.edge.EdgeDriver registration is skipped:
registration capabilities Capabilities [{platform=WINDOWS, browserName=MicrosoftEdge, version=}] does not match the current platform LINUX
21:53:09.071 INFO - Driver class not found: com.opera.core.systems.OperaDriver
21:53:09.071 INFO - Driver provider com.opera.core.systems.OperaDriver is not registered

此后没有更多输出。在本地，相同的命令就像一个超级按钮一样工作。任何提示如何解决此问题？

爪哇

root@PIV:/usr/share/nginx/pivdev/tests# java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

更新1

该服务根本不在任何端口上运行

Netstat输出

root@PIV:~# netstat -plnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      898/sshd        
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1247/sendmail: MTA:
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      974/mysqld      
tcp        0      0 127.0.0.1:587           0.0.0.0:*               LISTEN      1247/sendmail: MTA:
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1005/nginx      
tcp        0      0 0.0.0.0:81              0.0.0.0:*               LISTEN      1005/nginx      
tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN      496/vsftpd      
tcp6       0      0 :::22                   :::*                    LISTEN      898/sshd        
tcp6       0      0 :::35484                :::*                    LISTEN      2036/java       
tcp6       0      0 :::50920                :::*                    LISTEN      2036/java       
tcp6       0      0 :::8080                 :::*                    LISTEN      2036/java

更新2

好的，这里的主要问题是selenium服务器在启动时卡住了，我不知道为什么。我销毁了我的VPS机器并从头开始。selenium服务器启动一次，在我停止并再次启动后，问题发生了（重新启动后仍然存在）。有时即使第一次尝试也不起作用。

我不确定是Java问题还是Selenium服务器问题还是我的VPS主机问题。