Question: how to install svxlink on raspberry pi?
Answer: Update system and optionally disable X Desktop, we don't need GUI. apt-get update. ... 
Install dependencies. ... 
Add a new user. ... 
Download svxlink source. ... 
Compile and install svxlink. ... 
Install sounds. ... 
Configure sound levels. ... 
Tweak configuration files in /etc/svxlink/svxlink.conf and /etc/svxlink/svxlink.d/ModuleEchoLink.conf.