In this tutorial: link
After creating a new user with the privileges that I need, they recommend that I rename the root user to further ensure access, and a hacker, in addition to discovering the password, would have to find out the user.
Questions:
Since I created a new user and gave him all the privileges, do I still need root? Can not remove root and use only the new user I created?
If I remove the root user, do I need to remove the 3 that are registered in the User table (user table below)?
Why are 3 registered, not just 1?
+------------------+-----------+-------------------------------------------+
| user | host | password |
+------------------+-----------+-------------------------------------------+
| root | localhost | *DE06E242B88EFB1FE4B5083587C260BACB2A6158 |
| piucco | localhost | *D8DECEC305209EEFEC43008E1D420E1AA06B19E0 |
| root | 127.0.0.1 | *DE06E242B88EFB1FE4B5083587C260BACB2A6158 |
| root | ::1 | *DE06E242B88EFB1FE4B5083587C260BACB2A6158 |
| debian-sys-maint | localhost | *ECE81E38F064E50419F3074004A8352B6A683390 |
+------------------+-----------+-------------------------------------------+