Drupal - Where does PEAR install Drush?

On Unix or OS X, you can use which drush to learn the location. On Windows, it is where drush from the command line.

See the file examples/example.drushrc.php for instructions on where to put your drushrc.php configuration files. $HOME/.drush is a good location.

The drush status command will show you your active drushrc.php files, but it will not help you until you have created the file for the first time.

I have installed drush using pear as described here http://drupal.org/project/drush

pear channel-discover pear.drush.org
pear install drush/drush

Once installed, drush is can be founded here

/usr/lib/php/pear/drush