Ubuntu Bionic : Linha mal formada 51 no arquivo de fontes /etc/apt/sources.list

meu linux ubuntu ta dando esse erro e me impossibilitando de atualizar
E: Linha mal formada 51 no arquivo de fontes /etc/apt/sources.list (tipo)
E: A lista de fontes não pode ser lida.
E: Linha mal formada 51 no arquivo de fontes /etc/apt/sources.list (tipo)
E: A lista de fontes não pode ser lida.

obs: Sou iniciante

Eu me pergunto como alguém bota 51 linhas no source.list, mas manda ele aí:

cat /etc/apt/sources.list

 

mano se eu coloquei, eu coloquei sem saber

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to

# newer versions of the distribution.
deb http://br.archive.ubuntu.com/ubuntu/ bionic main restricted
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic main restricted

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

deb http://security.ubuntu.com/ubuntu bionic-security main restricted
# deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
deb http://security.ubuntu.com/ubuntu bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu bionic-security universe
deb http://security.ubuntu.com/ubuntu bionic-security multiverse
# deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
http://liveusb.info/multisystem/depot

Tira a última linha.

a última linha não deveria estar aí. Remova-a!


http://liveusb.info/multisystem/depot

desculpa a burrice mas como faço isso ?

Vá em Programas e Atualizações >> Outros Programas

Edite o repositório http://liveusb.info/multisystem/depot

Adicione deb

Exemplo:

deb http://liveusb.info/multisystem/depot

sudo sed -i '51d' /etc/apt/sources.list 

------------------------------------------| Linux User #621728 |-----------------------------------------

" Nem sempre é amigo aquele que te tira do buraco !!! ( Saddam Hussein )"

------------------------------------------| Linux User #621728 |-----------------------------------------

NOTA: Quando vc for abrir um tópico, pelo menos coloque um título decente, um título que exprima o conteúdo do mesmo.
* Tem muita gente que nem abre tópicos com esse tipo de título e nem com caixa alta, eu sou um que não abro a maioria.

Abçs.

------------------------------------------| Linux User #621728 |-----------------------------------------

" Nem sempre é amigo aquele que te tira do buraco !!! ( Saddam Hussein )"

------------------------------------------| Linux User #621728 |-----------------------------------------