Shell reads each line of the file

Shell reads each line of the file

Writing one:

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#!/bin/bash

While Read line

Do

Echo $line

Done < filename (files to be read)

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Two:

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#!/bin/bash

Cat filename (file to read) | While Read line

Do

Echo $line

Done

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If you need to output a line with a specified character, you can write

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#!/bin/bash

Cat filename (file to read) |  grep Word (Specify character) | While Read line

Do

Echo $line

Done

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Three:

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For line in ' cat filename (file to be read) '

Do

Echo $line

Done

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Description

For row-by-line reading and while progressive reading are different, such as:

The file contents are as follows:

$ cat File

1111

2222

3333 4444 555

$ cat File | while read line; do echo $line; Done

1111

2222

3333 4444 555

$ for line in $ (<file); do echo $line; Done

1111

2222

3333

4444

555

This article is from the "Big Meow Downhill" blog, please make sure to keep this source http://damiao.blog.51cto.com/8194496/1913687

Shell reads each line of the file