查看端口被占用：lsof

lsof 安装命令

[sarah@hadoop102 bin]$ sudo yum install -y lsof
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如何查看

比如查看8080端口被谁占用了

[sarah@hadoop102 bin]$ lsof -i:8080
COMMAND  PID  USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
java    8769 sarah   53u  IPv6 7950020      0t0  TCP *:webcache (LISTEN)
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可以看到8080端口被8769进程占用了，使用jps看8769属于哪个进程

[sarah@hadoop102 bin]$ jps
8769 QuorumPeerMain
11842 JournalNode
16898 HRegionServer
29706 ConsoleProducer
30094 ConsoleProducer
13329 JobHistoryServer
26068 RunJar
16596 HMaster
23510 NodeManager
23319 ResourceManager
28572 ConsoleConsumer
12062 DFSZKFailoverController
4963 HistoryServer
31075 YarnTaskExecutorRunner
13862 DataNode
15655 MasterServer
13799 NameNode
15912 LoggerServer
27944 Kafka
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可以看到进程是zk