Kodi IPTV Simple Client..At wit's end

Kodi Add-ons
19

I do not see system crontab (/etc/crontab) only user crontab for root user (storage/.cache/cron/crontabs/root).
I prefer system crontab…
I wont this command in crontab to start at boot:
echo 2 > /proc/sys/net/ipv4/tcp_ecn