启动frp客户端时报错：

[centos@localhost frp_0.27.0_linux_amd64]$ sudo ./frpc -c frpc.ini

2020/04/17 16:30:52 [W] [service.go:82] login to server failed: dial tcp: lookup xxxx.com on [::1]:53: read udp [::1]:33725->[::1]:53: read: connection refused

dial tcp: lookup frp.ai.com on [::1]:53: read udp [::1]:33725->[::1]:53: read: connection refused

解决：将frpc.ini文件中的server_addr的域名，更改为实际的ip地址。

ubuntu@center-kitchen:/app/frp_0.27.0_linux_amd64$ cat frpc.ini

[common]

server_addr = xxxx.com    #将域名更改为IP地址

server_port = xxxx

privilege_token = xxxxx

结束。