The installation of precompiled packages under Linux depends on the package format used. KIllustrator is available in rpm and deb package formats. For a successful installation be sure to select the package for your system. First, some definitions:
FILENAME = name of the package file (e.g.: killustrator_0.6.5-1_i386.deb)
PACKAGENAME = the created package name (usually killustrator)
To install an rpm package use the command rpm -i FILENAME.The package may be deleted later using the command rpm -e PACKAGENAME.
Similarly for deb packages, the installation command is dpkg -i FILENAME and to remove the package dpkg -r PACKAGE_NAME.
In both cases ROOT privileges will almost certainly be required to install or uninstall the packages.