Starting with Symantec Endpoint Protection (SEP) 14.2 MP1, the RPM packages included with the Linux client are now digitally signed. This document contains instructions to verify the digital signature of these RPM packages during installation of the product.
sudo rpm --import /path/to/SYMANTEC-RPM-GPG-Key
Where /path/to/SYMANTEC-RPM-GPG-Key is the path to the GPG signature file on the system.
sudo ./install.sh -i -checksig