Back on Topic, I believe that the Sophos security for Linux can be useful if there's files that's going to be transferred to Windows computers (or email attachments before sending). Though on some computers, this may be adding back some of the resources that was freed when removing their old OS & going with Linux. If it's realtime protection, then a Start entry will be created, and will load when the computer boots, usually followed by an update.
While the Linux OS itself is very secure, sometimes users will also use the WINE or Play on Linux app, and here is a area that needs some protection. I don't use either, yet have tried these in the past, some of the leftover files are hard to purge. It takes more than selecting the Uninstall link to remove it all. So I would say that for those whom uses or needs WINE, some form of security is needed. Is this the answer? I don't know. Yet I'll give this one a shot as soon as I reinstall Mint 17.1 (hopefully today). Now that my plans are in place, as to which SSD is going to be removed & reused for a notebook (see bottom Speccy link in my sig for the device details), I can move forward.
It's always good to see vendors extend these offers to Linux users, at one time Avast did, though it was buggy as crap & not all installs succeeded. Am not sure if this is offered anymore, though I would bother again if it were, they've moved to an 'upsell' platform, and chances are, they like some other vendors, licenses Linux security. Comodo also once had a 100% Free Linux security suite, can't remember if it also had a Firewall or not, though it never 'caught' anything, and I didn't expect it to. Some users, depending on situation, may have benefitted from Comodo for Linux. Easy to install & remove & both updates & scans could be scheduled.
As to business users whom are using Linux for day to day operations, depending on profession, security software is a mandate, not an option, whether this meets that requirement or not, am not sure. Though it likely is where the business is more loosely regulated. Any business that accepts credit/debit cards as form of payment also has to have installed security prior to the terminals being activated. This is not for the business, rather for the consumers protection whom uses the services offered & makes payments using a credit/debit card. That falls under the basic banking rules of the US & other regions.
For everyday home/student Linux users, it may be something worth checking out, though the OS has inbuilt security, in addition to Firewall protection if activated. Anyone whom cares about their security stance in the least should be using the ufw Firewall if running a Linux OS based on Ubuntu. Simple to activate, just copy/paste the below command in the Terminal, hit Enter & then give the root password (your own) & Enter again.
sudo ufw enable
EDIT: There's no need to have AdblockPlus, Ghostery & Disconnect if NoScript is installed. It's overkill & will only slow the Firefox browser to the point of being unresponsive on some computers. NoScript gets rid of most all of the extra content, only what the user allows is what runs. Maybe AdblockPlus or Ghostery (just one extra), if the computer can handle the load. These will cause Firefox to use more & more memory, of which some of our members needs all of the free RAM that can be spared, especially those with 2GB or less.
Edited by cat1092, 07 June 2015 - 02:26 AM.