使用阿里云ecs，，运行composer update，更新到一半，总是会提示 ：
Downloading: 100%Failed to download 2amigos/yii2-ckeditor-widget from dist: The "https://api.github.com/repos/2amigos/yii2-ckeditor-widget/zipball/023eb29fedfc3c3121c17688ed237e8688f5eb50" file could not be downloaded: php_network_getaddresses: getaddrinfo failed: Name or service not knownfailed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not knownNow trying to download from source – Installing 2amigos/yii2-ckeditor-widget (1.0.4)Cloning 023eb29fedfc3c3121c17688ed237e8688f5eb50Failed to download 2amigos/yii2-date-time-picker-widget from dist: The "https://api.github.com/repos/2amigos/yii2-date-time-picker-widget/zipball/1248491c959d7080ab45c5284429e3d9222ed282" file could not be downloaded: php_network_getaddresses: getaddrinfo failed: Name or service not knownfailed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not knownNow trying to download from sourcephp -r "getaddrinfo('api.github.com');" | php
但ping api.github.com 却是可以ping得通，而一开始可以访问，到后来却无法下载。奇怪的事情。
在linode vps上使用composer update从来都没遇到任何问题。国内的VPS各种
回避现实的人，未来将更不理想。
