Bonsoir,
j'ai finis par trouvé la solution. Elle consiste à modifier le fichier config.php de ruTorrent. Il faut indiquer les chemins dans la variable $pathToExternals.
Exemple :
$pathToExternals = array(
"php" => '', // Something like /usr/bin/php. If empty, will be found in PATH.
"curl" => '/usr/bin/curl', // Something like /usr/bin/curl. If empty, will be found in PATH.
"gzip" => '/bin/gzip', // Something like /usr/bin/gzip. If empty, will be found in PATH.
"bzip2" => '/bin/bzip2',
"id" => '', // Something like /usr/bin/id. If empty, will be found in PATH.
"stat" => '', // Something like /usr/bin/stat. If empty, will be found in PATH.
);