The example is not right in parameter, and also one command is same as first one, it should be typo before, we should use 'rw' as example for that. Signed-off-by: Kai Qiang Wu(Kennan) <wkqwu@cn.ibm.com> Upstream-commit: 62b525f75dbdb78f8ae7ee7f6b2cac2d262dc4dd Component: engine