Hi I can't find anything on how to update Kompozer through terminal, I think I have an older version. Please help!
The latest version is kompozer (1:0.8~b3.dfsg.1-0.1ubuntu2) in the Precise Universe repositories.
To be sure, start
sudo apt-get update sudo apt-get dist-upgrade
and check the version with
apt-cache policy kompozer
Note that Kompozer was dropped from the repositories for newer Ubuntu releases. 12.04 was the last release with Kompozer.