### Define the proxy in the CLI :

```shell
$ export https_proxy='87.248.188.202:8080'
$ export http_proxy='87.248.188.202:8080'
```

### Check proxy :

```shell
$ curl https://icanhazip.com
87.248.188.202

$ curl http://icanhazip.com
87.248.188.202
```

### Install composer :

```shell
$ curl -sS https://getcomposer.org/installer | php
```

(alternative: just download `https://getcomposer.org/composer.phar`, duh)

### Check composer :

```shell
$ php composer.phar diagnose
```