SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'

Question

I just installed Ubuntu 16.04 and installed web server on it. Everything works well, but I cannot access database. Even if I create new user and grant all privileges, I can\

Answer 1

With mysql Ver 14.14 Distrib 5.7.22 the update statement is now:

update user set authentication_string=password('1111') where user='root';