Log in to your Managed Hosting Server via SSH.
Add these two lines to the
alias php7cli='/usr/local/bin/php7-71LATEST-CLI' alias composer='php7cli ~/composer.phar'
Reload .bashrc with
$ source .bashrc
Install Composer with
$ curl -sS https://getcomposer.org/installer | php7cli
Check the installation with
$ composer --version
You should see something like this:
Composer version 1.7.3 2018-11-01 10:05:06
Your version will probably differ.