apt-cache search clamav
to
find the names of the packages available for installation. Unofficial
packages for Woody and Sarge are available and they are usually more
recent than official ones. Add the following lines to your
/etc/apt/sources.list:
for stable/woody (i386): deb http://people.debian.org/~sgran/debian woody main deb-src http://people.debian.org/~sgran/debian woody main for testing/sarge (i386): deb http://people.debian.org/~sgran/debian sarge main deb-src http://people.debian.org/~sgran/debian sarge mainFeel free to search for clamav on http://www.apt-get.org/ too.
yum update clamav or up2date -u clamavAnother very good repository is maintained by Dag Wieers: http://dag.wieers.com/packages/clamav/