The installation directory "/usr/local/bin" is not writable - How to fix this? I am trying to install the composer globally

ERROR message while trying to setup Composer

192:~ biancalouisedairo$ php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" 192:~ biancalouisedairo$ php -r "if (hash_file('sha384', 'composer-setup.php') === '93b54496392c062774670ac18b134c3b3a95e5a5e5c8f1a9f115f203b75bf9a129d5daa8ba6a13e2cc8a1da0806388a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" Installer verified 192:~ biancalouisedairo$ php composer-setup.php --install-dir=/usr/local/bin All settings correct for using Composer The installation directory "/usr/local/bin" is not writable 192:~ biancalouisedairo$

via Chebli Mohamed