#!/bin/bash
HOSTS=(host1
host2
)

uptime_mv ()
{
for host in "${HOSTS[@]}" ;
do
ssh -o ConnectTimeout=3 -o ConnectionAttempts=1 -n root@$host "uptime"  >> uptime_$host.log
done
}

while true ;do 
	uptime_mv ;
       sleep 5	
done > /dev/null 2>&1