BGP Router gateway down - Troubleshooting and fix the routing issue

Location - BN1 3FE, UK.
Ubuntu 10.04.04, Quagga-routing-suite, Not all the process running.

https://www.section.io/engineering-education/learn-how-to-set-up-linux-quagga-routing-suite

cat /etc/services | grep zebra

zebrasrv 2600/tcp # zebra service
zebra 2601/tcp # zebra vty
ripd 2602/tcp # ripd vty (zebra)
ripngd 2603/tcp # ripngd vty (zebra)
ospfd 2604/tcp # ospfd vty (zebra)
bgpd 2605/tcp # bgpd vty (zebra)
ospf6d 2606/tcp # ospf6d vty (zebra)
isisd 2608/tcp # ISISd vty (zebra)