If one is going to perform maintenance on the IEPM data base, Such such as creating indexes, dropping indexes, optimizing the database, etc. The following steps should be taken to assure that no access is attempted while the database is undergoing modification.
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It is not necessary to shut down mysql, but if you want to, use the following commands
#shutdown
To stop mysql: mysqladmin -u root -p shutdown
#restart
To restart mysql: sudo mysqld_safe &