监控网卡流量

while :
do
logfile=/tmp/`date +%F`.log
exec >> $logfile
date +"%F %H:%M"
sar -n DEV 1 2|grep Average|grep enp3s0|awk '{print $2,"\t","input:",$5*8*1000,"\n",$2,"\t","output:",$6*8*1000}'
done