I thinks so you have to install ia32-libs package.
Full steps are as follows:
This works for both 32 and 64 bit versions of Ubuntu 10.10 and above.
Step 1 Download the linux version (.deb file) from here
Step 2 Run following command to install debian package
Note: 64-bit versions of Ubuntu need ia32-libs, or similar package before install
sudo dpkg -i avg2012flx-r1795-a5274.i386.deb
Expected output is as follows
Selecting previously unselected package avg2012flx.
(Reading database ... 153531 files and directories currently installed.)
Unpacking avg2012flx (from avg2012flx-r1795-a5274.i386.deb) ...
Setting up avg2012flx (2012.1795) ...
Installing 'avgd' service initscripts...
Registering 'avgd' service to runlevels...
Adding system startup for /etc/init.d/avgd ...
/etc/rc0.d/K20avgd -> ../init.d/avgd
/etc/rc1.d/K20avgd -> ../init.d/avgd
/etc/rc6.d/K20avgd -> ../init.d/avgd
/etc/rc2.d/S20avgd -> ../init.d/avgd
/etc/rc3.d/S20avgd -> ../init.d/avgd
/etc/rc4.d/S20avgd -> ../init.d/avgd
/etc/rc5.d/S20avgd -> ../init.d/avgd
Registering with license: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
AVG command line controller
Copyright (c) 2012 AVG Technologies CZ
License was successfully changed.
Operation successful.
Please do configuration with /opt/avg/av/bin/avgsetup
Generating unique user id
Processing command line ...
Cfg file not specified using /opt/avg/av/cfg/diagcfg.xml.
New installation ID succesffully generated.
* Starting avgd ... [ ok ]
Processing triggers for man-db ...
Step 3 Reboot the PC to initialize AVG. Alternatively you could run
sudo /etc/init.d/avgd start
Step 4 Run following command to update virus database
sudo avgupdate
Expected output is as follows
AVG command line update
Copyright (c) 2012 AVG Technologies CZ
Running update.
Initializing...
Analyzing...
Downloading file: u12iavi5350u5270wc.bin 1 / 1 2.01 M
Analyzing...
Preparing installation...
Updating...
100% [===================================>]
Update was successfully completed.
Useful Commands
To Start AVG Anti-Virus run following command
sudo avgctl --start
For Scanning a Virus
avgscan -H /desire_folder
avgscan --heur /
To Update a Virus Databases
sudo avgupdate --priority 2
sudo avgupdate -p 3
sudo avgupdate -p 4
Source : How to Install AVG Free Antivirus Software on Ubuntu 12.10, 12.04