MySQL Daemon Failed to Start - centos 6

Try restarting apache sudo service httpd restart. Worked for me.

run this :

chown -R mysql:mysql /var/lib/mysql

and try again!

You may need free up some space from root (/) partition. Stop mysql process by:

/etc/init.d/mysql stop

Delete an unused database from mySql by command:

rm -rf [Database-Directory]

Execute it in /var/lib/mysql. Now if you run df -h, you may confused by still full space. For removing the unused database 's directory to be affected, you need to kill processes are using current directory/partition.

Stopping mysql_safe or mysqld_safe and then mysqld:

ps -A

Then find mysql's process number (e.g. 2234). Then execute:

kill 2234

Now start again mysql:

/etc/init.d/mysql start

The most likely cause for this error is that your mysql server is not running. When you type in mysql you are executing mysql client.

Try:

# sudo service mysql start
# mysql

Update (after OP included log in the question; taken from the comments below):

Thanks, saw your log. The log is saying the mysql user doesn't have proper access rights. I'm assuming your mysql user is mysql(this can be verified in /etc/my.cnf, execute

chown -R mysql:mysql /var/lib/mysql

and try starting mysqld again.