Hmm - it is available in the "Ign [noparse]http://archive.ubuntu.com[/noparse] raring/universe Translation-en_US" repository as referenced by the package manager... See: http://archive.ubuntu.com/ubuntu/dists/raring/universe/binary-i386/Packages.bz2:
Package: catfish
Priority: optional Section: universe/utils Installed-Size: 585 Maintainer: Xubuntu Developers <xubuntu-devel@lists.ubuntu.com> Original-Maintainer: Cody A.W. Somerville <cody-somerville@ubuntu.com> Architecture: all Version: 0.6.3-0ubuntu1 Depends: python (>= 2.7.1-0ubuntu2), gir1.2-glib-2.0, gir1.2-gtk-3.0, gir1.2-pango-1.0, python-zeitgeist, gir1.2-gdkpixbuf-2.0, yelp, gksu, locate, zeitgeist Filename: pool/universe/c/catfish/catfish_0.6.3-0ubuntu1_all.deb Size: 72958 MD5sum: eb0d86835b0f3a370d085bba664383e8 SHA1: cb6325b3438160a378b77a85a741b7d5b2d89ffd SHA256: a7c42f582082224a7b5216c8f330323297b70598fa8c4a59fe13ac966e7080d8 Description: a versatile file searching tool Homepage: http://software.twotoasts.de/index.php?/pages/catfish_summary.html Description-md5: 8a5903f90fc57fc1237e25f0d14ff6ad Bugs: https://bugs.launchpad.net/ubuntu/+filebug Origin: Ubuntu Task: xubuntu-desktop, ubuntustudio-desktop
...but it seems to be ignored during the update run. Try clearing out package lists:
sudo mv /var/lib/apt/lists /var/lib/apt/lists.old
...re-running the update:
sudo apt-get update
...and checking for catfish:
apt-cache policy catfish
If it exists, try installing it.
Also post back the results of those commands.