cannot install restricted xubuntu extensions...

[hmag]

Hello

The software center cannot install xubuntu extensions for proprietary extensions (flash, mp3, ...)

The issue is that the packages are not found on the server, as below


Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/o/oxide-qt/liboxideqtcore0_1.4.3-0ubuntu0.14.04.1_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/o/oxide-qt/oxideqt-codecs-extra_1.4.3-0ubuntu0.14.04.1_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/c/chromium-browser/chromium-codecs-ffmpeg-extra_40.0.2214.111-0ubuntu0.14.04.1.1069_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/liba/libav/libswscale2_9.16-0ubuntu0.14.04.1_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://security.ubuntu.com/ubuntu/pool/multiverse/f/flashplugin-nonfree/flashplugin-installer_11.2.202.442ubuntu0.14.04.1_i386.deb 404 Not Found [IP: 91.189.91.15 80]

My internet connection is OK, I am using the same now. The upgrade of xubuntu is on-going with no issue.
Trying to get the above files using Firefox returns the following. Clearly the packages are not on the server. Why ?
Thanks!
hmag
Not Found The requested URL /ubuntu/pool/main/o/oxide-qt/liboxideqtcore0_1.4.3-0ubuntu0.14.04.1_i386.deb was not found on this server.
Apache/2.2.22 (Ubuntu) Server at security.ubuntu.com Port 80

[bapoumba]

With the first and last error line, seems that you are not requesting the proper file number (I have not checked the others).
Please see here :
http://security.ubuntu.com/ubuntu/pool/main/o/oxide-qt/
http://security.ubuntu.com/ubuntu/pool/multiverse/f/flashplugin-nonfree/

If you are sure about your repositories, please run :

sudo apt-get update
sudo apt-get upgrade
You may not have updated your lists.

Then try :

sudo apt-get install xubuntu-restricted-extras

If you are not sure about your repos, please post :

cat -n /etc/apt/sources.list
ls -la /etc/apt/sources.list.d
tail -v -n +1 /etc/apt/sources.list.d/*

[deadflowr]

Trying to get the above files using Firefox returns the following. Clearly the packages are not on the server. Why ?

Simple really.
All those packages have been upgraded to newer versions, so the versions you are trying to install no longer exist on the server.
Run a system update.
In fact you can just do a quick

sudo apt-get update
and all the latest versions for those packages should show.
(As long as no errors are reported)

You might as well also run a

sudo apt-get upgrade
as well, to keep the system up-to-date.

Edit: HaHa, Ninja'd