Avast

by Inspector on November 8, 2013

in Security, Privacy

Avast free for Linux (specially for Ubuntu) is available to download and use. There are no wild viruses for Ubuntu, or any Linux based system, at least not known to Windows or MAC communities ;) – and that is because of Linux expert community watching the code, integrated update system, and more in-built security. But if you want to be sure, you can download and install Avast free for Linux.

You need to do a little work to get the Avast work on Linux. Follow these instructions.

Download the package, open it in the Ubuntu Software Centre. Click the Install button in the top-right-hand corner. Wait for it to finish installation before proceeding. Complete the registration to receive your free Key (via email). Email with the key might take some time (24 hours) to get to your inbox. You can use the same key for several installations with no issues. When you launch avast! you will be asked for a key. Copy key from email and provide the key.

Next you will need to update Avast for latest virus definitions. Updates come in blocks. Too big blocks for Ubuntu’s default shmmax. ShmMax is the maximum amount of shared memory any given process can have, and while it’s probably not big enough for pretty much everything, single big temporary downloads (like those for applying big updates) means avast! usually wants more, and exits with an Update Engine Error.

To fix it, we need to edit a file manually, which can be done in Gedit via the Terminal.

gksudo gedit /etc/init.d/rcS

Add this line of code in a new line directly before the line, which should already be there,

exec /etc/init.d/rc S
sysctl -w kernel.shmmax=128000000

or

sudo sysctl -w kernel.shmmax=128000000
kernel.shmmax = 128000000

Because you’ve edited the Kernel settings, which are things that load very early on, you’ll need to restart your computer before completing the next step.

Updating is easy, hit the big Update Database button in the top-left-hand corner, or go to Tools > Update Database. Under Tools > Preferences, you can also set it to install updates automatically.

Note: If you are using Ubuntu, you should download the deb version from below.

Download Avast Free for Linux

Download Avast for Ubuntu (deb / 27.7MB)
Download Avast for Linux (rpm / 27.8MB)
Download Avast for Linux (tar.gz)
Avast Downloads Page

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