Set Variables:
admin@RT-N66U:/# nvram set apps_dev=sda1 admin@RT-N66U:/# nvram set apps_mounted_path=/tmp/mnt/STICK
Replace the values with your device settings. Use mount to get them.
Execute Script:
admin@RT-N66U:/# /usr/sbin/app_base_link.sh
This example installs the irc proxy called miau:
admin@RT-N66U:/# /usr/sbin/app_install.sh miau
To get a list of all available applications:
admin@RT-N66U:/# ipkg list