apt-get install quanta+
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  cvs kfilereplace klinkstatus kommander libcvsservice0 libtidy-0.99-0 quanta quanta-data tidy
Suggested packages:
  kommander-dev gubed kimagemapeditor php-doc tidy-doc
Recommended packages:
  cervisia kompare kxsldbg wdg-html-reference docbook-defguide
The following NEW packages will be installed:
  cvs kfilereplace klinkstatus kommander libcvsservice0 libtidy-0.99-0 quanta quanta-data tidy
0 upgraded, 9 newly installed, 0 to remove and 2 not upgraded.
Need to get 5966kB/7756kB of archives.
After unpacking 23.9MB of additional disk space will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
  kfilereplace klinkstatus kommander libcvsservice0 quanta-data quanta
Install these packages without verification [y/N]? y
Err http://kubuntu.org edgy/main kfilereplace 4:3.5.6-0ubuntu1~edgy1
  404 Not Found
Err http://kubuntu.org edgy/main klinkstatus 4:3.5.6-0ubuntu1~edgy1
  404 Not Found
Err http://kubuntu.org edgy/main kommander 4:3.5.6-0ubuntu1~edgy1
  404 Not Found
Err http://kubuntu.org edgy/main libcvsservice0 4:3.5.6-0ubuntu1~edgy1
  404 Not Found
Err http://kubuntu.org edgy/main quanta-data 4:3.5.6-0ubuntu1~edgy1
  404 Not Found
Err http://kubuntu.org edgy/main quanta 4:3.5.6-0ubuntu1~edgy1
  404 Not Found
Failed to fetch http://kubuntu.org/packages/kde-latest/pool-edgy/kdewebdev/kfilereplace_3.5.6-0ubuntu1~edgy1_i386.deb  404 Not Found
Failed to fetch http://kubuntu.org/packages/kde-latest/pool-edgy/kdewebdev/klinkstatus_3.5.6-0ubuntu1~edgy1_i386.deb  404 Not Found
Failed to fetch http://kubuntu.org/packages/kde-latest/pool-edgy/kdewebdev/kommander_3.5.6-0ubuntu1~edgy1_i386.deb  404 Not Found
Failed to fetch http://kubuntu.org/packages/kde-latest/pool-edgy/kdesdk/libcvsservice0_3.5.6-0ubuntu1~edgy1_i386.deb  404 Not Found
Failed to fetch http://kubuntu.org/packages/kde-latest/pool-edgy/kdewebdev/quanta-data_3.5.6-0ubuntu1~edgy1_all.deb  404 Not Found
Failed to fetch http://kubuntu.org/packages/kde-latest/pool-edgy/kdewebdev/quanta_3.5.6-0ubuntu1~edgy1_i386.deb  404 Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?