求助，nexus7安装ubuntu13.04后安装软件问题

[wzzslinux]

大神我的系统是ubuntu13.04，用apt没法正常安装软件，update的时候老是出忽略要不就是404notfound，我是用的nexus7安装的ubuntu，arm架构的，诶，但是支持安装的好像就只有13.04这个版本，我也是小白一个，求大神指点迷津，怎么样往我的nexus7上安装软件，哪些软件可以安装，下边是一些觉得可能能用到的东西，据说是停止支持需要换套件库，我也不会换套件库。。。求大神帮忙

wzz@wzz-laptop:~$ sudo cat /etc/apt/sources.list
[sudo] password for wzz:
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://ports.ubuntu.com/ubuntu-ports/ raring main restricted
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://ports.ubuntu.com/ubuntu-ports/ raring-updates main restricted
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://ports.ubuntu.com/ubuntu-ports/ raring universe
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring universe
deb http://ports.ubuntu.com/ubuntu-ports/ raring-updates universe
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ports.ubuntu.com/ubuntu-ports/ raring multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring multiverse
deb http://ports.ubuntu.com/ubuntu-ports/ raring-updates multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://ports.ubuntu.com/ubuntu-ports/ raring-backports main restricted universe multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-backports main restricted universe multiverse

deb http://ports.ubuntu.com/ubuntu-ports/ raring-security main restricted
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-security main restricted
deb http://ports.ubuntu.com/ubuntu-ports/ raring-security universe
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-security universe
deb http://ports.ubuntu.com/ubuntu-ports/ raring-security multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports/ raring-security multiverse
deb http://ppa.launchpad.net/fcitx-team/nightly/ubuntu quantal main
deb-src http://ppa.launchpad.net/fcitx-team/nightly/ubuntu quantal main
wzz@wzz-laptop:~$ sudo ls -al /etc/apt/sources.list.d
total 16
drwxr-xr-x 2 root root 4096 10月 15 23:51 .
drwxr-xr-x 6 root root 4096 10月 20 09:40 ..
-rw-r--r-- 1 root root 286 10月 17 16:49 fcitx-team-nightly-raring.list
-rw-r--r-- 1 root root 213 10月 17 16:49 fcitx-team-nightly-raring.list.save

[lhw828]

额，重复了

[wzzslinux]

是啊，网不好，不小心发重了……