i need some help with commands in script box

I want to use some commands in script init and scheduler,some for timestamps of tcp to disable and one to refresh cache of dnsmasq, i'd like to know if i put well them
I use shibby tomsto k26 1.40 in netgear wnr3500lv2
here are the commands:
in scripts for init:
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
nothing more
in scheduler

Killall -HUP dnsmasq
and check every 20 minutes