If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:rev.linuxquestions.org/www/delivery/avw.php?zoneid=3&n=8cac36...
Url ContentGraphics Interchange Format
MIME Type / Internet Media Typeimage/gif
MIME Type image
File Extension.gif
More Details (link to:)Wikipedia: Graphics Interchange Format
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Server nginx
Date Wed, 21 Feb 2018 18:55:37 GMT
Content-Type image/gif
Connection keep-alive
Pragma no-cache
Cache-Control no-cache, no-store, must-revalidate
Expires 0
Access-Control-Allow-Origin *
P3P CP= CUR ADM OUR NOR STA NID
Set-Cookie OAGEO=FR%7C%7C%7C%7C%7C%7C%7C%7C%7C%7C; path=/
Set-Cookie OAID=de303431076b3e3d87deef8add9358ad; expires=Thu, 21-Feb-2019 18:55:37 GMT; Max-Age=31536000; path=/
Set-Cookie OAVARS[8cac360]=%7B%22bannerid%22%3A%22%22%2C%22zoneid%22%3A%223%22%7D; path=/

Load Info

load time (s)0.307538
redirect count0
speed download0
server IP45.56.65.7


* all occurrences of the string "http://" have been changed to "htt???/"