High Quality Content by WIKIPEDIA articles! A website defacement is an attack on a website that changes the visual appearance of the site. These are typically the work of system crackers, who break into a web server and replace the hosted website with one of their own. A message is often left on the webpage stating his or her pseudonym and the output from "uname -a" and the "id" command along with "shout outs" to his or her friends. Sometimes, the Defacer makes fun of the system administrator for failing to maintain server security. Most times, the defacement is harmless, however, it can sometimes be used as a distraction to cover up more sinister actions such as uploading malware.

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