You installed Symantec Endpoint Protection for Linux client (SEPFL) as Self-Managed and you want to register it to Symantec Endpoint Protection Manager(SEPM).
Legacy SEPFL clients, 14.3 MP1 and earlier
In your Symantec Endpoint Protection Manager choose a client group that you wish your client to be a member of.
Right-click the desired client group and choose "Export Communications Settings..." and save the sylink.xml file.
To import the sylink.xml file in Linux machine, run below command:
/opt/Symantec/symantec_antivirus/sav manage -i sylink.xml
Above command should show you "Imported successfully" and the client should appear as online in your SEPM.
To verify locally if the sylink.xml was imported successfully:
/opt/Symantec/symantec_antivirus/sav manage -s # to show the ip address of the managing SEPM
/opt/Symantec/symantec_antivirus/sav manage -p # to show which policy is applied
/opt/Symantec/symantec_antivirus/sav manage -g #to show under which group