bash 一次处理一行（awk实例)

awk '{printf "host "$3"   {\n""     hardware ethernet "$1";\n""     fixed-address "$2";\n""}\n"}' youfile

效果：

host D2   {
     hardware ethernet 192.168.0.65;
     fixed-address 00:26:18:08:49:8B;
}
host F5   {
     hardware ethernet 192.168.0.66;
     fixed-address 00:24:8C:66:42:9D;
}

bash 循环读入文件的每一行并处理

cat afile | while read oneline
do
    echo $oneline
done


#!/bin/bash
cat aa.txt|while read oneline
do
echo $oneline >oneline
IP=`awk '{printf ""$1"\n"}' oneline`
MAC=`awk '{printf ""$2"\n"}' oneline`
HOSTNAME=`awk '{printf ""$3"\n"}' oneline`
echo $IP
echo $MAC
echo $HOSTNAME
done