how often cpanel check for updates and updates it

[dropby23]

in whm
Main >> Server Setup >> Update Config
i set them to all automatic how often cpanel check the updates i want to learn that and will it be able to install them

also will it check openssl openssh etc.

[lloyd_tennison]

It does it every time you run /scripts/upcp. That is set as to when as a cron job. It is usually (and should be) run once a day.