cannot install plugins......or players

[rythm07devine]

i am new to linux and i have installed ubuntu linux 7.10...but i can neither play songs or movie .....when ever i am going to install the plugins a message is coming that"the list of application is not available"
i cant even install yum ,,,,whenever i am typing
sudo apt-get install yum
it is telling the package yum is not available
plzzzzzzzzzzzzz someone help

[devils casper]

apt-get and Synaptic Package Manager are default package managers of Ubuntu and you should use those only.

Look for Synaptic Package Manager in Menu, click on Reload, type package name in search box and install package(s). Synaptic is Graphical Interface of apt-get.
I would suggest you to install VLC Player. It supports most of media formats.
Execute this

sudo apt-get update
sudo apt-get install vlc

[rythm07devine]

i am not even able to install mozilla plugins such as flash player and shockwave

[devils casper]

Execute this

sudo apt-get install flashplugin-nonfree

[rythm07devine]

this is what happened ...on executing those commands

subhadip@subhadip-laptop:~$ sudo apt-get update
Ign cdrom://Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016) gutsy/main Translation-en_IN
Ign cdrom://Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016) gutsy/restricted Translation-en_IN
Reading package lists... Done
subhadip@subhadip-laptop:~$ sudo apt-get install vlc
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package vlc
subhadip@subhadip-laptop:~$ sudo apt-get install flashplugin-nonfree
E: Could not get lock /var/lib/dpkg/lock - open (11 Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
subhadip@subhadip-laptop:~$

[rythm07devine]

even when i am typing compizconfig in synaptics package manager nothing is coming...except libcompizconfig0 and libcompizconfig-backened-gconl

[devils casper]

Post the contents of /etc/apt/sources.list file here.

cat /etc/apt/sources.list

[rythm07devine]

this is the output that came.....


subhadip@subhadip-laptop:~$ cat /etc/apt/sources.list
deb cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016)]/ gutsy main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy main restricted
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy main restricted

## Major bug fix updates produced after the final release of the
## distribution.
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy-updates main restricted
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy-updates main restricted

## 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
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy universe
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy universe
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy-updates universe
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy-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.
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy multiverse
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy multiverse
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy-updates multiverse
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy-updates multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## 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 Index of /ubuntu gutsy-backports main restricted universe multiverse
# deb-src Index of /ubuntu gutsy-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository. This software is not part of Ubuntu, but is
## offered by Canonical and the respective vendors as a service to Ubuntu
## users.
# deb Index of /ubuntu gutsy partner
# deb-src Index of /ubuntu gutsy partner

# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy-security main restricted
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy-security main restricted
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy-security universe
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy-security universe
# Line commented out by installer because it failed to verify:
#deb Index of /ubuntu gutsy-security multiverse
# Line commented out by installer because it failed to verify:
#deb-src Index of /ubuntu gutsy-security multiverse
subhadip@subhadip-laptop:~$

[devils casper]

Press Alt+F2 and type this in command box :

gksu gedit /etc/apt/sources.list

Remove # sign before lines having words universe, multiverse, main and restricted. Put # sign before deb cdrom line. You can delete all other lines.

sources.list file should have these sources only :

deb Index of /ubuntu gutsy main restricted
deb Index of /ubuntu gutsy-updates main restricted
deb Index of /ubuntu gutsy universe
deb Index of /ubuntu gutsy-updates universe
deb Index of /ubuntu gutsy multiverse
deb Index of /ubuntu gutsy-updates multiverse
deb Index of /ubuntu gutsy-backports main restricted universe multiverse
deb Index of /ubuntu gutsy-security main restricted
deb Index of /ubuntu gutsy-security universe
deb Index of /ubuntu gutsy-security multiverse

Save file and execute this

sudo apt-get clean all
sudo apt-get update

Install necessary packages now.

[rythm07devine]

i went for the 2nd option ....and this is what it came

subhadip@subhadip-laptop:~$ sudo apt-get clean all
[sudo] password for subhadip:
subhadip@subhadip-laptop:~$ sudo apt-get update
E: Malformed line 1 in source list /etc/apt/sources.list (URI parse)
subhadip@subhadip-laptop:~$ sudo apt-get install flashplugin-nonfreeE: Malformed line 1 in source list /etc/apt/sources.list (URI parse)
E: The list of sources could not be read.
subhadip@subhadip-laptop:~$