Question: Do I need to register for SAV for linux? If so, how?
Problem: Cannot update threat signatures for free linux after installation and
/opt/sophos-av/bin/savsetup
to match settings for primary and secondary servers to my ID and pw at Sophos:
/opt

Question

Question: Do I need to register for SAV for linux? If so, how? 
 Problem: Cannot update threat signatures for free linux after installation SAV 9.01 for linux and running 
 /opt/sophos-av/bin/savsetup 
 to match settings for primary and secondary servers to my ID and pw at Sophos: 
 /opt/sophos-av/bin/savupdate 
 produces 
 Failed to download 'sdds:SOPHOS': invalid authentication. Please check PrimaryUpdateUsername and PrimaryUpdatePassword. Failed to update from primary update source. Redirecting to secondary update source. Failed to download 'sdds:SOPHOS': invalid authentication. Please check SecondaryUpdateUsername and SecondaryUpdatePassword. Failed to replicate from all update sources 
 I am confident I entered my Sophos userid and PW correctly for both primary and secondary in /opt/sophos-av/bin/savsetup .

DavidKra · Answer

SAV for linux is now installed, updated, and active. 
 Solution: 
 As described in www.sophos.com/.../savl_9_sgeng.pdf 
 Uninstall: sudo /opt/sophos-av/uninstall.sh 
 Install (Free version): sudo ./sophos-av/install.sh 
 Fetching free update credentials. 
 (This succeeded where it had failed yesterday.) 
 DO NOT do as described in https://www.sophos.com/en-us/medialibrary/PDFs/documentation/savl_9_cgeng.pdf 
 DO NOT follow 15.4 Configure an update server 
 DO NOT do sudo /opt/sophos-av/bin/savsetup 
 DO NOT put in the userid and password that you created when you registered on the Sophos web site. 
 DO Update: sudo /opt/sophos-av/bin/savupdate 
 
 SUCCESS !! 
 Thank you, Sophos.

Question: Do I need to register for SAV for linux? If so, how? Problem: Cannot update threat signatures for free linux after installation and /opt/sophos-av/bin/savsetup to match settings for primary and secondary servers to my ID and pw at Sophos: /opt