Setting up Satellite Internet Connection with Alpine Linux 2.5.4

I try to do this how-to "Setting up Satellite Internet Connection" on Alpine Linux 2.5.4 ( http://wiki.alpinelinux.org/wiki/Setting_up_Satellite_Internet_Connection ) but every commands are not working, for exemple :

# add linuxtv-dvb-apps or apk add linuxtv-dvb-apps
# szap -c /etc/channels.conf -q

Please can you help me, I am working with Technisat Skystar 2 PCI card and it is correctly installed by the system and showed by command

# ls -la /dev/dvb*

I am already receiving one way satellite Internet on windows system (http://www.broadsat.com/opensky/index) with a small program called "OPENSKY Connection Manager" (http://www.broadsat.com/support/opensky/download) and now I try to do same thing on Alpine Linux.

Best regards.