[SOLVED] Composer: file_put_contents(./composer.json): failed to open stream: Permission denied

Issue

I'm trying to install Prestissimo to an Ubuntu 16.04 server, but that leads to an error:

$ composer global require "hirak/prestissimo:^0.3"
Changed current directory to /home/kramer65/.composer


  [ErrorException]
  file_put_contents(./composer.json): failed to open stream: Permission denied


require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--] [<packages>]...

I'm logged in as user kramer65, so I wouldn't know why it can't write to my home folder. My normal reaction to a permission denied is to use sudo, but composer then always says:

Do not run Composer as root/super user! See https://getcomposer.org/root for details

Any idea how I can solve this?

Solution

I had this problem to install laravel/lumen.

It can be resolved with the following command:

$ sudo chown -R $USER ~/.composer/

Answered By - Samuel Martins