To install a composer package globally, you run the usual require command, but with the addition of the global modifier. So to install PHPUnit, you would run:
$ composer global require phpunit/phpunit
$ composer global require phpunit/dbunit
$ composer global require phing/phing
$ composer global require phpdocumentor/phpdocumentor
$ composer global require sebastian/phpcpd
| vendor/bin/phpunit --testsuite=Container --repeat=3 | |
| PHPUnit 7.5.13 by Sebastian Bergmann and contributors. | |
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This is a simple way to backup your MySQL tables to Amazon S3 for a nightly backup - this is all to be done on your server :-)
Sister Document - Restore MySQL from Amazon S3 - read that next
this is for Centos 5.6, see http://s3tools.org/repositories for other systems like ubuntu etc