After installing MySQL, when we try to start MySQL, sometimes we may not be able to start it. The reasons can be different. We share some general cases where MySQL cannot be started.Case 1: Directory or file permission issueIf the permission is set wrongly in MySQL's $datadir and its sub directories or files, MySQL will not be able to read and write files normally.Error message:mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data/usr/local/mysql/bin/mysqld_safe: line 107: /usr/local/mysql/data/imysql.local.err: Permission deniedCase 2: Port conflictThere may be other my...