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SHELL 读取文件的每一行内容并输出
假设读取的文件为当期目录下的 test.txt 文件,内容如下: Google Runoob Taobao 实例 1 [mycode4 type='bash'] #!/bin/bash while read line do echo $line done < test.txt [/mycode4] 执行输出结果为: Google Runoob Taobao 实例 2 [mycode4 ty..
Updated 7/16/2026
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假设读取的文件为当期目录下的 test.txt 文件,内容如下:
Google Runoob Taobao
实例 1
#!/bin/bash
while read line
do
echo $line
done < test.txt
while read line
do
echo $line
done < test.txt
执行输出结果为:
Google Runoob Taobao
实例 2
#!/bin/bash
cat test.txt | while read line
do
echo $line
done
cat test.txt | while read line
do
echo $line
done
执行输出结果为:
Google Runoob Taobao
实例 3
for line in `cat test.txt`
do
echo $line
done
do
echo $line
done
执行输出结果为:
Google Runoob Taobao
for 逐行读和 while 逐行读是有区别的,如:
$ cat test.txt
Google
Runoob
Taobao
$ cat test.txt | while read line; do echo $line; done
Google
Runoob
Taobao
$ for line in $(<test.txt); do echo $line; done
Google
Runoob
Taobao
Runoob
Taobao
$ cat test.txt | while read line; do echo $line; done
Runoob
Taobao
$ for line in $(<test.txt); do echo $line; done
Runoob
Taobao