dbaascli patch db prereq

The dbpatchm prereq subcommand of the dbaascli utility is used to check the prerequisites for an Oracle Database or Oracle Grid Infrastructure patch.

Connect to a compute node as the opc user and run the command as the root user.

To check patch prerequisites on specific instances, use the following command:

# dbaascli patch db prereq --patchid patchid 
--instance1 hostname:oracle_home [--dbnames dbname[,dbname2 ...]]

To check patch prerequisites by specifying only database names, use the following command:
```
# dbaascli patch db prereq --patchid patchid 
--dbnames dbname[,dbname2 ...] [-alldbs]
```

In the preceding commands:

patchid identifies the patch to be pre-checked.

Note:
For details about how to find the available patch identifiers, see Listing Available Patches.
--instance1 specifies a compute node and Oracle Home directory that is subject to the pre-check operation. In this context, the Oracle Home directory may be an Oracle Database home directory or the Oracle Grid Infrastructure home directory.
--dbnames specifies the database names for one or more databases that are the target of the pre-check operation.
-alldbs specifies that you want to pre-check all of the databases that share the same Oracle Database binaries (Oracle Home) as the specified databases.