How to find out why the MySQL server does not start?

Question

linux

Probably a dumb question, but I really don't understand why the mysql server won't start .
I make some changes to the configuration file my.cnf and that's it - it doesn't start and doesn't report an error until I remove all the changes I've made.
Tell me how to see the startup error? Just sorting through all the parameters due to which the launch may fail is quite long and tedious, I make a lot of changes.
MySQL v5.5

Answer 1

Stop the service and start directly in the mysqld_safe console as root. It will either immediately show you an error, or show you the place where it logs - it will be either syslog or a file. See further messages in this log.