Hello,
Check this video to install SAV for linux as a unmanaged client:
https://www-secure.symantec.com/connect/videos/install-process-symantec-antivirus-savfl-red-hat-linux
Check these articles to know how to downoad setup files.
https://www-secure.symantec.com/connect/articles/downloading-current-latest-products-symantec-flexnetoperations-earlier-symantec-fileconnect
https://www-secure.symantec.com/connect/articles/understanding-downloads-symantec-endpoint-protection-sep-121-available-symantec-fileconnect
Symantec Endpoint Protection version 11/12.1 RU5 prior releases does not support Linux environment. There is no SEP for Linux. There is SAV for Linux (SAVFL) which is included on the SEP disk download.
The SAVFL client cannot be managed by the SEPM, although it can report logs back to the SEPM by using SAV Reporter, which was released after SAVFL 1.0.10, but can be downloaded from the following KB article.
Symantec AntiVirus for Linux (SAVFL) Reporter 1.0.10 Release Notes
http://www.symantec.com/docs/DOC3474
SAV for Linux Scanning Best Practices: A (Somewhat) Illustrated Guide
https://www-secure.symantec.com/connect/articles/sav-linux-scanning-best-practices-somewhat-illustrated-guide
Best practice to install Symantec Antivirus for Linux.
http://www.symantec.com/docs/TECH150596
But with the release of SEP 12.RU5, The enterprise version of Symantec Endpoint Protection now includes the Symantec Endpoint Protection client for Linux. The Symantec Endpoint Protection client for Linux replaces the Symantec AntiVirus client for Linux and supports a greater range of distributions and kernels. Added distributions include Red Hat Enterprise Linux Server (RHEL) 6.5 and CentOS 6.5
SEP for Linux clients can now be managed by an RU5 SEPM, or later. Configuration enhancements have been made to the SEPM to allow policy creation for managed Linux clients. This includes AV policy settings, centralized exceptions, and LiveUpdate settings. The SEPM also features enhanced reporting for Linux clients, including the SEP client version, host OS details, and hardware details.