Here's how to get ikiwiki. See setup for how to use it, and be sure to add your wiki to IkiwikiUsers if you use ikiwiki.
tarball
The best place to download a tarball of the latest release is from http://packages.debian.org/unstable/source/ikiwiki.
Installation steps and requirements are listed on the install page.
packages
To install with apt, if using Debian or Ubuntu:
apt-get install ikiwiki
Or download the deb from http://packages.debian.org/unstable/web/ikiwiki.
There is a backport of a recent version of ikiwiki for Debian 4.0 at http://packages.debian.org/etch-backports/ikiwiki.
Fedora versions 8 and newer have RPMs of ikiwiki available.
There is also an unofficial backport of ikiwiki for Ubuntu Jaunty, provided by Paweł Tęcza, at http://gpa.net.icm.edu.pl/ubuntu/.
NetBSD and many other platforms: pkgsrc has an ikiwiki package.
FreeBSD has ikiwiki in its ports collection.
Gentoo has an ebuild in its bug database.
The openSUSE Build Service has packages for openSUSE
IkiWiki can be installed from macports
by running sudo port install ikiwiki
.
A PKGBUILD for Arch Linux is in the AUR.
revision control
Ikiwiki is developed in a git repository.