Linux Install and verify softflowd for Netflow on OpenWrt softflow [https://github.com/irino/softflowd] is a great opensource Netflow exporter that is support on OperWrt [https://openwrt.org/] :) This allows us to sample the flows running through our
ASA Install & configure nfdump with nfsen on Ubuntu server 10.04 This was done using Ubuntu server 10.04 although everything is compiled from source so the commands should be very similar on any linux box. There are also example configs