Originally Posted by Ujjain
If you require extra information or know of a better place where to ask this, please let me know.
Your posts are a bit confusing, and yes more information is needed. You don't say anything about your environment, what version/distro of Linux you're running, or what version of MySQL.
You say "seems to be showing problems", and "corrupt of some kind". Care to elaborate? If the applications that need to access the database are working, that should tell you if the database is corrupt or not.
Does your database use ISAM tables? Have you backed up this database, using mysqldump, in case you have problems? That would be a good idea, no matter what. You can then restore the backup to another system, run your checks/repairs/etc/, and not touch a production system.
Also, have you checked the user ID/password/syntax on the command? Check the man page for mysqlcheck.