Shell—讀取文件的每一行內容並輸出

讀取文件的每一行內容並輸出

#!/bin/bash

# 方法1
while read line
do
    echo $line
done < a.txt


# 方法2
cat a.txt | while read line
do
    echo $line
done

# 方法3
# for line in `cat  a.txt`
for line in $(cat a.txt)
do
    echo $line
done