I have a Vagrant running Linux and I\'m trying to install Symfony.
After the command composer create-project symfony/framework-standard-edition ./ \"2.5.*\"
To me it helped to install a (new) version via command line from download homepage https://getcomposer.org/download/. I can exclude some file permissions as I was root with chmod +R 0777, though I had virtualbox mounted drive. Anyway since new version worked, would mean it was version, or running a new version via php phar, and the original bin belonged to root
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '48e3236262b34d30969dca3c37281b3b4bbe3221bda826ac6a9a62d6444cdb0dcd0615698a5cbe587c3f0fe57a54d8f5') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"