Logging LE_INFO()

Hello
I used legato 20.04.
For logging messages i use LE_INFO(…)
It work.
but when i use LE_DEBUG(…)
I do not receive messages.
i read doc about level messages
https://docs.legato.io/latest/c_logging.html#c_log_controlling

i set command
$ export LE_LOG_LEVEL=DEBUG

but i do not recive messages agan.

How to fix it?

How about this?