I tried to install gbrowse2 at ubuntu 15:04. when the installation went smoothly, but when I call link display an error message
Forbidden
You don't have permission to access /cgi-bin/gb2/gbrowse/yeast on this server. Apache/2.4.7 (Ubuntu) Server at 10.88.25.48 Port 80
Try changing the permissions as
sudo chmod 755 +R /cgi-bin/gb2/gbrowse/