To do this you need SSH/telnet support
Run the following commands in the terminal
cd ~
mkdir wp-cli
cd wp-cli
curl -k -L https://raw.github.com/wp-cli/builds/gh-pages/phar/wp-cli.phar > wp-cli.phar
echo ‘alias wp=”php ~/wp-cli/wp-cli.phar”‘ >> ~/.bashrc
source ~/.bashrc