error 2002 (hy000): can't connect to local mysql server through socket '/var/lib/mysql/mysql.sock' (2)
mariadb.service can't be started,at first,it works very well, after i edit /etc/hosts and reboot, the mariadb is not starting. i don't know why. in /etc/lib/mysql directory ,no file mysql.sock, i try use mysql -h localhost, mysql -h controller , the error is the same.
Answer Answered by Ian Gilfillan in this comment.
Take a look at Troubleshooting Connection Issues.
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