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...

I first planned to release this text as an appendix entry for Learn You Some Erlang, but considering this feels more like editorial content and not exactly something for a reference text, I decided it would fit better as a blog post.Many newcomers to Erlang manage to understand the syntax and program around it without ever getting used to it. I've read and heard many complaints regarding the syntax and the 'ant turd tokens' (a subjectively funny way to refer to ,, ; and .), how annoying it is, etc.As mentioned at some point in the book, Erlang draws its syntax from Prolog. While this gives a r...