[shell]判断网络情况并加上时间戳

最近需要做一个实时统计网络情况并统计误包率的脚本，下面是StackExchange上的一个剽窃，虽然不完全满足，但只可以输出一些信息

#!/bin/bash

host=$1

if [ -z $host ]; then
    echo "Usage: `basename $0` [HOST]"
    exit 1
fi

while :; do
    result=`ping -W 1 -c 1 $host | grep 'bytes from '`
    if [ $? -gt 0 ]; then
        echo -e "`date +'%Y/%m/%d %H:%M:%S'` - host $host is 33[0;31mdown33[0m"
    else
         echo -e "`date +'%Y/%m/%d %H:%M:%S'` - host $host is 33[0;32mok33[0m -`echo $result | cut -d ':' -f 2`"
        sleep 1 # avoid ping rain
    fi
done

ping google.com | awk '{ sent=NR-1; received+=/^.*(time=.+ ms).*$/; loss=0; } { if (sent>0) loss=100-((received/sent)*100) } { print $0; printf "sent:%d received:%d loss:%d%%
", sent, received, loss; }'

ping google.com | awk '{ sent=NR-1; received+=/^.*(time=.+ ms).*$/; loss=0; } { if (sent>0) loss=100-((received/sent)*100) } { printf "sent:%d received:%d loss:%d%%
", sent, received, loss }'

ping ... | sed -n -e 's/.*(100% packet loss).*/1/p' 
                  -e 's_.*min/avg/max = [0-9]*/([0-9]*)/[0-9]*.*_1_p'

 统计每一帧的错误率

#!/bin/bash
#=== PARAMETERS change them here

# add ip / hostname separated by while space
Host="www.baidu.com"
# no ping request
COUNT=1
      
#=== Local vars (do not change them)
# Cron-friendly: Automaticaly change directory to the current one
cd $(dirname "$0")
      
# Current script filename
SCRIPTNAME=$(basename "$0")
      
# Current date and time
today=$(date '+%Y-%m-%d')
currtime=$(date '+%H:%M:%S')
      
#=== Main script
while :
do
    msg=$(ping -c $COUNT $Host | grep 'loss')
    echo -e "`date +'%Y/%m/%d %H:%M:%S'` ($Host 64Bytes) $msg" #>> plwatch.txt
done

结果