Drush command to switch to a multi-site child directory? Is there a Drush command that would cd into the directory of a particular multi-site instance, I mean to go to a directory like this one:

/srv/www/drupal/sites/alpha

where the parent Drupal resides in:

/srv/www/drupal

Thanks.
drush status produces a Site Path in its output which is what you're looking for. With some additional shell commands, you can parse this out.

MYPATH=/srv/www/drupal
MYDOMAIN=example.com

SITE_PATH=$(drush status --root=$MYPATH --uri=$MYDOMAIN | grep 'Site path' | cut -d':' -f2 | xargs)
cd "$MYPATH/$SITE_PATH"