Ubuntu 20.04 LTS 

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ea1erj's picture
Ubuntu 20.04 LTS 

It gives me an error and I think I have the libraries installed

MySQL coud not be started, please check if the MySQL server is installed properly
If You don’t find the answer, ask in CQRLOG forum and attach last 20 lines from the mysql.erre.file

2020-04-25T11:37:20.755326Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.19-0ubuntu5) starting as process 16823
2020-04-25T11:37:20.757186Z 0 [Warning] [MY-013242] [Server] --character-set-server: 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous.
2020-04-25T11:37:20.757198Z 0 [Warning] [MY-013244] [Server] --collation-server: 'utf8_bin' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead.
2020-04-25T11:37:20.771468Z 1 [ERROR] [MY-011011] [Server] Failed to find valid data directory.
2020-04-25T11:37:20.771664Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2020-04-25T11:37:20.771748Z 0 [ERROR] [MY-010119] [Server] Aborting
2020-04-25T11:37:20.772382Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.19-0ubuntu5) (Ubuntu).

install the following package:
sudo apt install mariadb-server-10.3 mariadb-client-10.3
And it already works.

n3meq's picture
Thank you

This resolved my issue. Thank you.
73 Dave, N3MEQ


I just installed Ubuntu 20.04 then CQRLOG.
I am having problems launching CQRLOG, which led me to consult the forum and I came across this discussion, and I hastened to apply the suggested command.

I still encounter the same error:
Error during connection to database: TMySQL57connection Server connect failed.
On the "Database problem" window I cannot open the "mysql.err file" file
By performing a search on my / home I find an empty file.

Thank you for helping me solve this problem,


Make sure you're not still

Make sure you're not still running MySQL alongside MariaDB.

no report with ubuntu 20.04.01 jtdx 151

Tks for your help
i use this page:

and now i have this message (problem date)
sorry for bad english.73
Didier f1mxe