With the release of the January patches, Oracle released version 12.2.0.1.19 of OPatch. In this specific release, the execution of opatch util cleanup deletes OS files outside the Oracle home directory structure. Thanks to my colleague Miguel for pointing this out.
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Grid Infrastructure does not start after Kernel upgrade to 3.10.0-514.21.2
A lot of operating system vendors released recently an updated version of the Linux Kernel to fix an issue called Stack Clash (CVE-2017-1000364). But after applying the new Kernel version, the startup of the Grid Infrastructure fails.
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