composer install e composer update

Estou com uma nova instalação do ubuntu e não consigo mais rodar o composer install, mostra a mensagem:

" Failed to download doctrine/inflector from dist: curl error 28 while downloading https://api.github.com/repos/doctrine/inflector/zipball/8b7ff3e4b7de6b2c84da85637b59fd2880ecaa89: Connection timed out after 10002 milliseconds

    Now trying to download from source "

e no composer update:

" dokafe@e3713fc9ebb7:/var/www$ composer update

Loading composer repositories with package information

In CurlDownloader.php line 377:

  curl error 28 while downloading https://repo.packagist.org/packages.json: Failed to connect  

   to repo.packagist.org port 443: Connection timed out                                        

update [--with WITH] [--prefer-source] [--prefer-dist] [--prefer-install PREFER-INSTALL] [--dry-run] [--dev] [--no-dev] [--lock] [--no-install] [--no-autoloader] [--no-suggest] [--no-progress] [-w|--with-dependencies] [-W|--with-all-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [-i|--interactive] [--root-reqs] [--] [<packages>...] "