How to write a shell script that downloads web images

This article mainly introduces "how to write a shell script for downloading web pictures". In daily operation, I believe many people have doubts about how to write a shell script for downloading web pictures. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts of "how to write a shell script for downloading web pictures". Next, please follow the editor to study!

How to use it:

Copy the following code and name it img_downloader.sh. When using, type. / img_downloader.sh www.baidu.com-d images under shell, and the shell script will download the picture on Baidu's home page.

The code is as follows:

#! / bin/bash

If [$#-ne 3]

Then

Echo "Usage: $0 URL-d DIRECTORY"

Exit-1

Fi

For i in {1..4}

Do

Case $1 in

-d) shift; directory=$1; shift

*) url=$ {url:-$1}; shift

Esac

Done

Mkdir-p $directory

Baseurl=$ (echo $url | egrep-o "https?:// [a Murz.] +")

Echo "$baseurl"

Curl-s $url | egrep-o "

] * > "|

Sed's /