安装composer（sudo composer install）时出现此错误
任何人都可以帮助我吗？
Cannot create cache directory /home/tanmay/.composer/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache
无法创建缓存目录/home/tanmay/.composer/cache/files/，或者目录不可写。继续进行无缓存
[Composer\Downloader\TransportException]
The "https://packagist.org/packages.json" file could not be downloaded:
SSL operation failed with code 1. OpenSSL Error messages:
error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol
Failed to enable crypto
failed to open stream: operation failed