Send a request to the website "random.org/strings" with the parameters "num=1", "len=8", "digits=on", "upperalpha=on", "loweralpha=on", "unique=on", and "format=plain". Then, use the command "tr" to delete all characters that are not A-Z, a-z, or 0-9.
curl -s https://www.random.org/strings/?num=1\&len=8\&digits=on\&upperalpha=on\&loweralpha=on\&unique=on\&format=plain | tr -dc A-Za-z0-9