12.3. yum Options
yum options are typically stated before specific yum commands; i.e. yum . Most of these options can be set as default using the configuration file.
<options> <command> <package name/s>
The following is a list of the most commonly-used yum options. For a complete list of available yum options, refer to man yum.
-y
Answer "yes" to every question in the transaction.
-t
Sets yum to be "tolerant" of errors with regard to packages specified in the transaction. For example, if you run yum update package1 package2 and package2 is already installed, yum will continue to install package1.
--exclude=<package name>
Excludes a specific package by name or glob in a specific transaction.