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Jenkins连接Linux失败

启动方式没有launch slave agents via SSH选项。
错误如下：

[05/16/19 21:13:50] [SSH] Starting sftp client.
[05/16/19 21:13:50] [SSH] 正在拷贝最新版本的 remoting.jar...
java.io.IOException: Could not copy remoting.jar into '/root/.jenkins' on agent
	at hudson.plugins.sshslaves.SSHLauncher.copyAgentJar(SSHLauncher.java:1109)
	at hudson.plugins.sshslaves.SSHLauncher.access$400(SSHLauncher.java:128)
	at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:866)
	at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:833)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: Could not copy remoting.jar to '/root/.jenkins/remoting.jar' on agent
	at hudson.plugins.sshslaves.SSHLauncher.copyAgentJar(SSHLauncher.java:1104)
	... 7 more
Caused by: java.io.FileNotFoundException: remoting.jar
	at hudson.model.Slave$JnlpJar.getURL(Slave.java:430)
	at hudson.model.Slave$JnlpJar.connect(Slave.java:394)
	at hudson.model.Slave$JnlpJar.readFully(Slave.java:459)
	at hudson.plugins.sshslaves.SSHLauncher.copyAgentJar(SSHLauncher.java:1096)
	... 7 more
[05/16/19 21:13:50] Launch failed - cleaning up connection
[05/16/19 21:13:50] [SSH] 连接关闭

配置如下：