User with erroneous password

pinnerite

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Jan 16, 2022, 5:13:55 PM1/16/22

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This is for a MythTV database.

$ sudo mysql --defaults-file=/etc/mysql/debian.cnf mysql

mysql> SELECT User,authentication_string,Host from user;
+------------------+------------------------------------------------------------------------+-----------+
| User | authentication_string | Host |
+------------------+------------------------------------------------------------------------+-----------+
| mythtv | *B5BCD029F2268798922CDC55B5253D354B2C0246 | % |
| debian-sys-maint | $A$005$F5 %d'zoHMtJEX88t/x1bvIEMnwtseub5Tc7Z02gRpckab8.tZPnvPL5 | localhost |
| mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
!ug2Ym[S%/K+ca2n7M06VWGOgOzJFxxKkrg/c7pjNT6Dm3n3FzLXm56 | localhost |
| root | *2B2E29BFA4C432ED2C7C49E07B175220796B98EE | localhost |
+------------------+------------------------------------------------------------------------+-----------+

I want to change the authentication string in the first line with 'mythtv'.
I also want to remove the penultimate line which appears to have no user(?)
This in MySQL version 8.0.
Nothing I do succeeds.
Can someone put me straight?
TIA

--
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running on an AMD Phenom II X4 Black edition processor with 16GB of DRAM.

John Levine

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Jan 16, 2022, 5:35:23 PM1/16/22

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UPDATE user set authentication_string="swordfish" where user="mythtv";

>I also want to remove the penultimate line which appears to have no user(?)

DELETE from user where authentication_string like "ug2Ym%";

If that doesn't work, see if you can figure out what crud is really in the user string, e.g.

SELECT hex(User), authentication_string, Host from user;

--
Regards,
John Levine, jo...@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

J.O. Aho

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Jan 17, 2022, 1:48:58 AM1/17/22

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On 16/01/2022 23.35, John Levine wrote:
> It appears that pinnerite <pinn...@gmail.com> said:
>> This is for a MythTV database.
>>
>> $ sudo mysql --defaults-file=/etc/mysql/debian.cnf mysql
>>
>> mysql> SELECT User,authentication_string,Host from user;
>> +------------------+------------------------------------------------------------------------+-----------+
>> | User | authentication_string | Host |
>> +------------------+------------------------------------------------------------------------+-----------+
>> | mythtv | *B5BCD029F2268798922CDC55B5253D354B2C0246 | % |
>> | debian-sys-maint | $A$005$F5 %d'zoHMtJEX88t/x1bvIEMnwtseub5Tc7Z02gRpckab8.tZPnvPL5 | localhost |
>> | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
>> | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
>> | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
>> !ug2Ym[S%/K+ca2n7M06VWGOgOzJFxxKkrg/c7pjNT6Dm3n3FzLXm56 | localhost |
>> | root | *2B2E29BFA4C432ED2C7C49E07B175220796B98EE | localhost |
>> +------------------+------------------------------------------------------------------------+-----------+
>>
>> I want to change the authentication string in the first line with 'mythtv'.
>
> UPDATE user set authentication_string="swordfish" where user="mythtv";

Not sure that would work well, as far as I'm aware it would lead to that
swordfish would be there as plain text and not as a hash. You would need
to use PASSWORD('swordfish').

I think the following is more what you "should" do:

SET PASSWORD FOR 'mythtv'@'%' = bigshark;

sure you can also use later user in the same way too.

--

//Aho