首先使用netstat命令查看其占用的端口：

netstat -anp | grep 8090

tcp        0      0 0.0.0.0:8090            0.0.0.0:*               LISTEN      25155/java          
tcp        0      0 172.17.5.201:8090       101.39.228.33:9742      ESTABLISHED 25155/java          
tcp        0      0 172.17.5.201:8090       101.39.228.33:9740      TIME_WAIT   -                   
tcp        0      0 172.17.5.201:8090       101.39.228.33:9741      ESTABLISHED 25155/java          
tcp        0      0 172.17.5.201:8090       101.39.228.33:9739      TIME_WAIT   -                   
[root@rgsc-baofu opt]# 

查到进程id之后，用ps命令查看进程的详情：

 ps -ef | grep 25155 或者 ps -aux | grep  25155 

root     25155     1  0  2019 ?        04:06:37 java -jar /opt/quality/Quality.jar --spring.config.location=/opt/quality/application.properties
root     32453 28674  0 14:49 pts/0    00:00:00 grep --color=auto 25155
[root@rgsc-baofu opt]# 

杀掉进程

kill -9 25155