Update repositories attempt - Synaptic gives error in source list file, etc.

[3DUser]

I tried to update repositories and goofed somewhere.
Synaptic will not work at all. It gives me the following message in a window when I click on System-Administration-Synaptic Package Manager:

E: Malformed line 46 in source list /etc/apt/sources.list (dist parse)

E: The list of sources could not be read.

Go to the repository dialog to correct the problem.

E: _cache->open() failed, please report

I have absolutely no idea how to fix or what to do next.
I don't know what malformed line ..... means .
I'm using Ubuntu 7.0.4 on a PC.

If anyone has a solution, please let me know in the simplest of terms since I am very new to Linux.

Thanks.

[smartboyathome]

post what sudo gedit /etc/apt/sources.list contains.

[3DUser]

Here it is -

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb cdrom:[Ubuntu 7.04 _Feisty Fawn_ - Release i386 (20070415)]/ feisty main restricted
deb http://us.archive.ubuntu.com/ubuntu/ feisty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ feisty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty-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.
deb http://us.archive.ubuntu.com/ubuntu/ feisty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty 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://us.archive.ubuntu.com/ubuntu/ feisty multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty 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 http://us.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu feisty-security main restricted
deb-src http://security.ubuntu.com/ubuntu feisty-security main restricted
deb http://security.ubuntu.com/ubuntu feisty-security universe
deb-src http://security.ubuntu.com/ubuntu feisty-security universe
deb http://security.ubuntu.com/ubuntu feisty-security multiverse
deb http://archive.ubuntu.com/ubuntu/ feisty-updates restricted main multiverse universe
deb-src http://security.ubuntu.com/ubuntu feisty-security multiverse
deb http://archive.ubuntu.com/ubuntu/feisty main

[3DUser]

Solved.
I commented out line 46 using the # sign at the beginning of the line.
Restarted Synaptic and it works.

[HWelsh]

I was trying to add sources and apparently mucked things up. I now get the same error as the first poster. Can somebody please tell me what I have to change to make Synaptic and everything work again?
thanks

here's the source

#
# deb cdrom:[Ubuntu 7.04 _Feisty Fawn_ - Release i386 (20070415)]/ feisty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://us.archive.ubuntu.com/ubuntu/ feisty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ feisty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty-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.
deb http://us.archive.ubuntu.com/ubuntu/ feisty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty 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://us.archive.ubuntu.com/ubuntu/ feisty multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ feisty 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 http://us.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu feisty-security main restricted
deb-src http://security.ubuntu.com/ubuntu feisty-security main restricted
deb http://security.ubuntu.com/ubuntu feisty-security universe
deb-src http://security.ubuntu.com/ubuntu feisty-security universe
deb http://security.ubuntu.com/ubuntu feisty-security multiverse
deb http://ppa.launchpad.net/rharding/ubuntu gutsy main
deb-src http://ppa.launchpad.net/rharding/ubuntu
deb-src http://security.ubuntu.com/ubuntu feisty-security multiverse

[Kiwinote]

Open your sources.list file with "gksudo gedit /etc/apt/sources.list"
Overwrite the contents with the following:
# This sources.list was generated for you by Sorgen-1.1.0 - Coded by Kiwinote

# the ubuntu security repository
deb http://security.ubuntu.com/ubuntu feisty-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu feisty-security main restricted universe multiverse

# the ubuntu repository
deb http://archive.ubuntu.com/ubuntu feisty main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu feisty main restricted universe multiverse

# the ubuntu updates repository
deb http://archive.ubuntu.com/ubuntu feisty-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu feisty-updates main restricted universe multiverse
Now execute the command "sudo apt-get update"