批量更新Linux文件後綴名

#!/bin/bash
#Create_Time 2019-08-06
#use: small_wei
#查找並,批量修改文件後綴
#後綴爲 .txt 修改成 .log


find /opt -name "*.txt" | awk -F ".txt" '{print $1}' | while read i
do
mv ${i}.txt ${i}.log
done