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Use this for Central Deployment via SmartConsole or the blink utility.
upgrade_tools install /var/log/upload/Gaia_R81.20_T392.upd
As of the latest release cycles, Check Point’s major version is R81.20 (and recently R82). There is no official R81.39. The t392 in your keyword almost certainly refers to Take 392 —a specific hotfix or cumulative update for R81.20. This article will focus on Check Point R81.20 Take 392 .