Get " https://registry-1.docker.io/v2/ ": dial tcp 199.59.149.236:443: i/o timeout
更换如下源
nano /etc/docker/daemon.json

              
                {  
"registry-mirrors": ["https://docker.registry.cyou",  
"https://docker-cf.registry.cyou",  
"https://dockercf.jsdelivr.fyi",  
"https://docker.jsdelivr.fyi",  
"https://dockertest.jsdelivr.fyi",  
"https://mirror.aliyuncs.com",  
"https://dockerproxy.com",  
"https://mirror.baidubce.com",  
"https://docker.m.daocloud.io",  
"https://docker.nju.edu.cn",  
"https://docker.mirrors.sjtug.sjtu.edu.cn",  
"https://docker.mirrors.ustc.edu.cn",  
"https://mirror.iscas.ac.cn",  
"https://docker.rainbond.cc"]  
}

              </code>
            </pre>



 
` systemctl daemon-reload ` 
 ` systemctl restart docker `