Composer file put contents composer json failed to open stream Permission denied

Question

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   --    lt packages gt        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

User · Answer

For me  in Ubuntu 18 04  I needed to chown inside    config composer  E g  sudo chown -R  USER    config composer  Then global commands work

User · Answer

In my case I used sudo mkdir projectFolder to create folder  It was owned by root user and I was logged in using non root user  So I changed the folder permission using command sudo chown mynonrootuser mynonrootuser projectFolder and then it worked fine

User · Answer

In my case I don t have issues with    composer  So being inside Laravel app root folder  I did sudo chown -R  USER composer lock and it was helpful

User · Answer

To resolve this  you should open up a terminal window and type this command   sudo chown -R user    composer  with user being your current user  in your case  kramer65   After you have ran this command  you should have permission to run your composer global require command    You may also need to remove the  composer file from the current directory  to do this open up a terminal window and type this command   sudo rm -rf  composer

User · Answer

This might be super edge case  but if you are using Travis CI and taking advantage of caching  you might want to clear all cache and retry    Fixed my issue when I was going from sudo to non sudo builds

User · Answer

I had this problem to install laravel lumen   It can be resolved with the following command     sudo chown -R  USER    composer

User · Answer

In my case   composer was owned by root  so I did sudo rm -fr  composer and then my global require worked   Be warned  You don t wanna use that command if you are not sure what you are doing

User · Answer

I faced this issue as well but in my case  I was in wrong directory  Check the directory you are working

User · Answer

I was getting the same exception  but in my case I am using PowerShell to run commands So  I fixed this with an instruction to unblock multiple files first  PS C   gt  dir C  executable file Path  PowerShell    Unblock-File and then use the following to load the package  amp   C  path to executable php exe   quot c  path to composer  phar file composer phar  quot require desired package

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

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