从Linux中的两个文件内容重命名文件名

Question

I am having basic knowledge in Linux and need your help to develop concept for following requirement. I have two files FILE_NAMES.txt and FILE_NAMES_TS.txt. The content of files as below.

FILE_NAMES.txt
====
jan_
feb_
mar_

FILE_NAMES_TS.txt
====
jan_20170921.csv
feb_20170921.csv
mar_20170921.csv

All the above content are nothing but file names and are placed in db_views/data directory. For the content of FILE_NAMES_TS.txt are 0 bytes initially. Now have to move / rename from jan_ to jan_20170921.csv , and so on. That means the file jan_20170921.txt is now non-zero bytes. Please help.

Answer 1

You can use readarray bash function to read files into 2 arrays and then use mv command to rename each file

#!/bin/bash

readarray a < names.txt
readarray b < names_ts.txt

len=${#a[@]}

echo $len

for (( i=0; i<${len}; i++ ));
do
    echo mv ${a[$i]} ${b[$i]}
done

Answer 2

您可以扩展特殊的文件描述符技术，以同时读取两个文件，然后读取mv 。