bash脚本文件读写操作

读文件

script % touch read.sh
script % chmod 755 read.sh

#!/usr/bin/env bashfileName=""
echo input file name:
read fileName # 等待用户输入文件名
COUNT=1while read -r LINE # 读入一行
doecho $COUNT $LINE((COUNT++))
done < $fileName # 读入文件
exit 0

 script % ./read.sh    
input file name:
food.txt
1 apple
2 grape
3 blackberry

food.txt：

apple
grape
blackberry

写入文件 >

read.sh:

#!/usr/bin/env bashCOUNT=1while read -r LINE # 读入一行
doecho $COUNT $LINE((COUNT++))
done < $1 # 读入文件
exit 0

将读文件的结果写入out.txt:

script % ./read.sh food.txt > out.txt
script % cat out.txt
1  apple
2  grape
3  blackberry