说明：Linux 系统，jdk8 ruoyiv4.7.7

启动项目报错 java.net.SocketException: 权限不够

控制台log

11:11:14.538 [restartedMain] INFO  o.a.c.h.Http11NioProtocol - [log,173] - Starting ProtocolHandler ["http-nio-80"]
11:11:14.542 [restartedMain] WARN  o.s.b.w.s.c.AnnotationConfigServletWebServerApplicationContext - [refresh,591] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
11:11:14.545 [restartedMain] INFO  o.q.c.QuartzScheduler - [shutdown,666] - Scheduler quartzScheduler_$_NON_CLUSTERED shutting down.
11:11:14.545 [restartedMain] INFO  o.q.c.QuartzScheduler - [standby,585] - Scheduler quartzScheduler_$_NON_CLUSTERED paused.
11:11:14.545 [restartedMain] INFO  o.q.c.QuartzScheduler - [shutdown,740] - Scheduler quartzScheduler_$_NON_CLUSTERED shutdown complete.
11:11:14.546 [restartedMain] INFO  sys-user - [shutdownAsyncManager,62] - ====关闭后台任务任务线程池====
11:11:14.546 [restartedMain] INFO  sys-user - [shutdownEhCacheManager,75] - ====关闭缓存====
11:11:14.552 [restartedMain] INFO  c.a.d.p.DruidDataSource - [close,2138] - {dataSource-1} closing ...
11:11:14.663 [restartedMain] INFO  c.a.d.p.DruidDataSource - [close,2211] - {dataSource-1} closed
11:11:14.667 [restartedMain] INFO  o.a.c.h.Http11NioProtocol - [log,173] - Pausing ProtocolHandler ["http-nio-80"]
11:11:14.667 [restartedMain] INFO  o.a.c.c.StandardService - [log,173] - Stopping service [Tomcat]
11:11:14.672 [restartedMain] INFO  o.a.c.h.Http11NioProtocol - [log,173] - Stopping ProtocolHandler ["http-nio-80"]
11:11:14.672 [restartedMain] INFO  o.a.c.h.Http11NioProtocol - [log,173] - Destroying ProtocolHandler ["http-nio-80"]
11:11:14.702 [restartedMain] ERROR o.s.b.SpringApplication - [reportFailure,870] - Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181)
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155)
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:937)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:780)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:453)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:343)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1370)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1359)
	at com.ruoyi.RuoYiApplication.main(RuoYiApplication.java:18)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229)
	at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43)
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178)
	... 19 common frames omitted
Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:235)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213)
	... 21 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1039)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.addConnector(StandardService.java:232)
	... 23 common frames omitted
Caused by: java.net.SocketException: 权限不够
	at sun.nio.ch.Net.bind0(Native Method)
	at sun.nio.ch.Net.bind(Net.java:461)
	at sun.nio.ch.Net.bind(Net.java:453)
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:222)
	at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:276)
	at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:231)
	at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1302)
	at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1388)
	at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:663)
	at org.apache.catalina.connector.Connector.startInternal(Connector.java:1037)
	... 25 common frames omitted

Process finished with exit code 1

原因

在linux下，如果使用1024以下的端口则需要root权限，因为我当前使用的不是root权限，所以权限不足而无法使用80端口，所以会报权限不够异常。把服务端口改为非80端口且大于1024的端口，比如8088即可。
在配置文件中修改端口号。

ruoyi默认端口80