getting error while updating Composer

Question

I have a project in Laravel-5.1 and I have changed my platform from win10 to Ubuntu.

Showing error:

Loading composer repositories with package inf

Answer 1

A lot of good answers already for Ubuntu. I'm on Linux and had the same problem but none of the commands above worked for me.

With Linux and php70 I used the following command which worked great:

sudo yum install php70-mbstring -y