Question

creating users through mysql admin, but unable to login mysql command line

following on-line suggestions, as root issued

grant all on *.* to new_user;

it worked, but security-wise was a mess, so issued

revoke all on *.* from new_user;

now new_user can still connect, but security is sane as set in mysql admin

to me this is thoroughly hocus-pocus. what’s really going on, and how do you really enable login?

this seems to be a MySQL Administrator problem (thanks @marco). if the same GRANT is issued in mysql command line, the user can log in; but it the grant is issued in Administrator, the user cannot log in.

as @marco pointed out, any access will grant mysql login access to the user, eg, SELECT privileges – but they need to be entered in msql command line.

Answer 1

That’s because when you first use GRANT, user is created automatically; when you revoke privileges, user remains…
Check this link.

First you should give your user only the privileges he really needs.
Second: give the user access only to db or tables he should see/work on.
Example:

GRANT SELECT,INSERT,UPDATE ON mydb.* TO 'jeffrey'@'localhost';

or

GRANT SELECT ON db2.invoice TO 'jeffrey'@'localhost' 
IDENTIFIED BY PASSWORD 'sdsd';

EDITED:
Just to prove what I’m saying:
enter mysql console (mysql -u root -p) and type

USE mysql;
SELECT * FROM user;

You’ll see users MySql has inside.
Well, now use GRANT as you please on a user which does not exists yet; then repeat SELECT * FROM user;: you’ll see new user created!!