Since August 12 (about two weeks now), I was getting this error from the MySQL program mysqldump:
Warning: Using unique option prefix pass instead of password is deprecated and will be removed in a future release. Please use the full name instead.
I’m not sure what changed or what got upgraded, but I was able to track down the problem. It has nothing to do with command syntax.
In the account directory, which is the one with the account name, one level above public_html, or just “~” on the command line, I found a file named “.my.cnf” with the “pass=” option in it.
To fix the problem, find that file and change “pass=” to “password=”.
I have also forwarded this information to the BlueHost help desk.