Ubuntu – Wget batch of files fails, curl works, what am I doing wrong

If a target web server has directory indexing enabled, and all the files to download are located in the same directory, you can download all of them, by using wget's recursive retrieval option.

use

wget -r -l1 -A.jpg http://www.example.com/test/

it will download all .jpg file from directory test.

if you don't want to download all file then the infos below will be helpful.

   -A acclist --accept acclist
   -R rejlist --reject rejlist
       Specify comma-separated lists of file name suffixes or patterns to 
       accept or reject. Note that if any of the wildcard characters, *, ?,
       [ or ], appear in an element of acclist or rejlist, it will be 
       treated as a pattern, rather than a suffix.

   --accept-regex urlregex
   --reject-regex urlregex
       Specify a regular expression to accept or reject the complete URL.

like :

wget -r --no-parent -A '*.jpg' http://example.com/test/

You've missed to follow redirections with curl as the URL endpoint is redirected (301) to another endpoint (https://s3.amazonaws.com/logzio-elk/apache-daily-access.log); sending a request with HEAD method (-I) to the specified URL:

% curl -LI https://logz.io/sample-data
HTTP/1.1 301 Moved Permanently
...
...
Location: https://s3.amazonaws.com/logzio-elk/apache-daily-access.log
...

HTTP/1.1 200 OK
...
...
Server: AmazonS3

As curl does not follow HTTP redirections by default, you need to tell curl to do so using the -L/--location option:

curl -LO https://logz.io/sample-data

As wget follows redirections by default, you're getting to the eventual URL with wget as-is.