RexCommandsUpload :
导出函数
upload($local, $remote)
如果$remote是目录，将会上传至此目录中。
task "upload", "remoteserver", sub {
upload "localfile", "/path";
};
task "upload", "192.168.137.3", sub {
upload "/root/ssh.sh", "/tmp/file";
};
[root@node01 Rex]# rex upload
[2017-05-10 07:05:38] INFO - Running task upload on 192.168.137.3
[2017-05-10 07:05:49] INFO - All tasks successful on all hosts
将本地的/root/ssh.sh 上传到/tmp/
下