can't run update manager

[jayanramesh]

Dear pals,
when I run synaptic package manager it gives the following massage-"E: Type 'x' is not known on line 57 in source list /etc/apt/sources.list
E: The list of sources could not be read.
Go to the repository dialog to correct the problem.
E: _cache->open() failed, please report.".help to resolve this problem will be very much appreciated.

[Partyboi2]

Looks like you have a bad entry in your sources.list. Can you open a terminal (Applications>Accessories>Terminal) and post your sources.list

cat /etc/apt/sources.list

[binbash]

there is something wrong at line 57 @ /etc/apt/sources.list . Paste it here or you can check that line

[jayanramesh]

Dear partyboi2
It's wonderful seeing you again.I did what you asked me to do .This is what I got at terminal---"# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://in.archive.ubuntu.com/ubuntu/ intrepid main

## Major bug fix updates produced after the final release of the
## distribution.
deb http://in.archive.ubuntu.com/ubuntu/ intrepid-updates main

## 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://in.archive.ubuntu.com/ubuntu/ intrepid universe
deb http://in.archive.ubuntu.com/ubuntu/ intrepid-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.

## 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.

## 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 http://archive.canonical.com/ubuntu intrepid partner
deb-src http://archive.canonical.com/ubuntu intrepid partner

deb http://security.ubuntu.com/ubuntu intrepid-security main
deb http://security.ubuntu.com/ubuntu intrepid-security universe
deb http://dl.google.com/linux/deb/ stable non-free #Google
# deb http://repository.cairo-dock.org/ubuntu intrepid cairo-dock #Cairo Dock
deb http://in.archive.ubuntu.com/ubuntu/ intrepid-proposed main universe
x
".And your help will be highly esteemed.
Thank you.

[jayanramesh]

there is something wrong at line 57 @ /etc/apt/sources.list . Paste it here or you can check that line

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

deb http://in.archive.ubuntu.com/ubuntu/ intrepid main

## Major bug fix updates produced after the final release of the
## distribution.
deb http://in.archive.ubuntu.com/ubuntu/ intrepid-updates main

## 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://in.archive.ubuntu.com/ubuntu/ intrepid universe
deb http://in.archive.ubuntu.com/ubuntu/ intrepid-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.

## 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.

## 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 http://archive.canonical.com/ubuntu intrepid partner
deb-src http://archive.canonical.com/ubuntu intrepid partner

deb http://security.ubuntu.com/ubuntu intrepid-security main
deb http://security.ubuntu.com/ubuntu intrepid-security universe
deb http://dl.google.com/linux/deb/ stable non-free #Google
# deb http://repository.cairo-dock.org/ubuntu intrepid cairo-dock #Cairo Dock
deb http://in.archive.ubuntu.com/ubuntu/ intrepid-proposed main universe
x

[Therion]

deb http://in.archive.ubuntu.com/ubuntu/ intrepid-proposed main universe
x <--- Rogue Character!
".And your help will be highly esteemed.
Thank you.
There's your problem, according to the error message. Just clean up that line and you should be fine.

[avtolle]

You need to edit the list and delete the "x" on the last line.
sudo nano /etc/apt/sources.listdelete the "x", then Ctrl+o to write, Enter to save to the file, Ctrl+x to exit nano, then do
sudo aptitude update
sudo aptitude safe-upgradeplease post any error messages you might get.

[jayanramesh]

Dear Avtolle,
Thank you very much for your explicit and transparent help you provided me.Problem solved and my little knowledge growing stronger imbibing lessons from good people like you.Once again thanks a lot.

[jayanramesh]

There's your problem, according to the error message. Just clean up that line and you should be fine.
Dear Therion
if I say" otoconia" or just a "cor"you won't understand unless anyone gives you clear definition . Being a physician I can understand but not a lay-people.So please furnish a simple to tough remedy depends on someone's grade on that particular field of knowledge.If you are stronger in one field naturally weaker in another
No arrogance any-time-any-where.If you do so you will really be always behind me as you mentioned.
Thank you very much-For your sophisticated way of answering.