How to uninstall contact-lookup-applet from Ubuntu
To uninstall just contact-lookup-applet package itself from Ubuntu execute on terminal:
sudo apt-get remove contact-lookup-applet
Uninstall contact-lookup-applet and it's dependent packages
To uninstall the contact-lookup-applet package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove contact-lookup-applet
If you also want to delete configuration and/or data files of contact-lookup-applet from Ubuntu then this will work:
sudo apt-get purge contact-lookup-applet
To delete configuration and/or data files of contact-lookup-applet and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge contact-lookup-applet
contact-lookup-applet package information
contact lookup applet for GNOME
An applet to quickly search your Evolution address book from the GNOME panel.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.