总是报同样的错误，请教如何解决

rd@rd-G31M-ES2C:~/www/laravel-dev$ composer install Loading composer repositories with package information Installing dependencies (including require-dev) from lock file - Installing phpdocumentor/reflection-docblock (2.0.4) Downloading: Failed Downloading: Failed Downloading: Failed Failed to download phpdocumentor/reflection-docblock from dist: The "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/d68dbdc53dc358a816f00b300704702b2eaff7b8" file could not be downloaded: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution Now trying to download from source - Installing phpdocumentor/reflection-docblock (2.0.4) Cloning d68dbdc53dc358a816f00b300704702b2eaff7b8 [RuntimeException] Failed to clone https://github.com/phpDocumentor/ReflectionDocBlock.git via https, ssh protocols, aborting. - https://github.com/phpDocumentor/ReflectionDocBlock.git Cloning into '/home/rd/www/laravel-dev/vendor/phpdocumentor/reflection-docblock'... fatal: unable to access 'https://github.com/phpDocumentor/ReflectionDocBlock.git/': Could not resolve host: github. com - git@github.com:phpDocumentor/ReflectionDocBlock.git Cloning into '/home/rd/www/laravel-dev/vendor/phpdocumentor/reflection-docblock'... ssh: Could not resolve hostname github.com: Temporary failure in name resolution fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.

The "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/d68dbdc53dc358a816f00b300704702b2eaff7b8" file could not be downloaded: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution failed to open stream: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution

这个包我浏览器可以直接下载下来的，不知道为什么composer就是死活下不下来