Wget: read URL from file, add sequence of number to the URL

Question

I am reading a file (with URL's) line by line:

#!/bin/bash
while read line
do
    url=$line
    wget $url
    wget $url_{001..005}.jpg
done < $1

For first, I want to download primary url as you see wget $url. After that I want to add to the url sequence of numbers (_001.jpg, _002.jpg, _003.jpg, _004.jpg, _005.jpg):

wget $url_{001..005}.jpg

...but for some reason it's not working.

Sorry, missed out one thing: the url's are like http://xy.com/052914.jpg. Is there any easy way to add _001 before the extension? http://xy.com/052914_001.jpg. Or I have to remove ".jpg" from the file containing URL's then simply add later to the variable?

Do all of the URLs have the same extension? – Politank-Z May 22 '15 at 19:43 — Politank-Z, May 22 '15 at 19:43
Yes, all URLs have .jpg extension. – Adrian May 22 '15 at 19:51 — Adrian, May 22 '15 at 19:51

score 5 · Answer 1 · answered May 22 '15 at 19:14

5

Another way escaping the underscore char:

wget $url\_{001..005}.jpg

answered May 22 '15 at 19:14

Iris G.

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score 3 · Accepted Answer · edited May 23 '17 at 11:43

3

Try encapsulating your variable name:

wget ${url}_{001..005}.jpg

Bash is trying to expand the variable $url_ in your command.

As for your jpg within the URL followup, see substring expansion in the bash manual.

wget ${url:0: -4}_{001..005}.jpg

The :0: -4 means, expand to the variable from position zero (the first character), minus the last 4 characters.

Or from this answer:

wget ${url%.jpg}_{001..005}.jpg

%.jpg removes .jpg specifically and will work on older versions of bash.

edited May 23 '17 at 11:43

Community

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answered May 22 '15 at 19:10

Politank-Z

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Thank you, it works! I just realized that I missed one point from my question (updated). – Adrian May 22 '15 at 19:41

Wget: read URL from file, add sequence of number to the URL

2 Answers2