The prerequisite checks ensure that the minimum system requirements to carry out the installation are met.
If you click Check Again, then you can run the prerequisite check again to see if the minimum requirements are met to carry on with the database installation.
Click Fix & Check Again, if you want the installer to fix the problem and check the system requirements again.
Note: On Linux and UNIX systems, the Fix & Check Again option generates a fixup script that sets operating system parameters to values that Oracle recommends.
From the list, select one of the following options:
Show Failed: Select to obtain a list of failed prerequisites.
Show All: Select to obtain a list of prerequisites checks performed.
Show Succeeded: Select to obtain a list of prerequisites checks that completed successfully.
Note: You can check Ignore All to ignore all the errors and proceed with the database installation.