How to use the command to start downloading and synchronizing the EPG in the openBH system? I've tried several methods without success. Please let me know!

How to use the command to start downloading and synchronizing the EPG in the openBH system? I've tried several methods without success. Please let me know!
I want to use a command to download and synchronize the EPG each time I start up, as a cold start sometimes fails to sync the EPG.