How to Add MariaDB Error Log File on CentOS 7/8
Hello server administrator, in this article I’m going to share how to create MariaBD error log flie on CentOS. I’m testing on CentOS 8. Let’s start:
Table of Contents
Check Log File
We can see log file in my.cnf file like:
cat /etc/my.cnfWe can also find log file using:
# login to mysql
mysql -u root -p
# now see log file location
show variables like '%log_erro%';If you see like below image, you need to create error log file:
MariaDB [(none)]> show variables like '%log_erro%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_error | |
+---------------+-------+Create Log File
Open my.cnf file and add this code:
[mysqld_safe]
log_error=/var/log/mariadb/error.log
[mysqld]
log_error=/var/log/mariadb/error.log
After that, restart mariadb service:
systemctl restart maridbNow try to find error log file:
# login to mysql
mysql -u root -p
# now see log file location
show variables like '%log_erro%';Output:
MariaDB [(none)]> show variables like '%log_erro%';
+---------------+----------------------------+
| Variable_name | Value |
+---------------+----------------------------+
| log_error | /var/log/mariadb/error.log |
+---------------+----------------------------+See Error Logs & Reset
We’ve added error log file. Now let’s check error logs by using this command:
sudo tail -f /var/log/mariadb/error.logGreat..! We’re seeing error logs of MariaDB. To reset or make the log file empty, just run this command:
sudo truncate -s 0 /var/log/mariadb/error.logShare on Social Media
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