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problemas com o apt-get install

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problemas com o apt-get install

Instalei o Ubuntu recentemente e tenho tentado instalar alguns programas usando o apt-get mas parece nunca funcionar, nem mesmo o apt-get update funciona, aqui está o que recebo quando tento instalar algo, neste caso: jdk-7 do java usando:

apt-get install openjdk-7-jre-headless

aqui está o que eu recebo:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-3.2.0-29 linux-headers-3.2.0-29-generic-pae
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 24 not upgraded.
mkhas@mkhas-Inspiron-3520:~/Downloads$ sudo apt-get install openjdk-7-jre-headless
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-3.2.0-29 linux-headers-3.2.0-29-generic-pae
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  ca-certificates-java icedtea-7-jre-jamvm java-common openjdk-7-jre-lib tzdata-java
Suggested packages:
  default-jre equivs sun-java6-fonts ttf-dejavu-extra fonts-ipafont-gothic
  fonts-ipafont-mincho ttf-telugu-fonts ttf-oriya-fonts ttf-kannada-fonts
  ttf-bengali-fonts
The following NEW packages will be installed:
  ca-certificates-java icedtea-7-jre-jamvm java-common openjdk-7-jre-headless
  openjdk-7-jre-lib tzdata-java
 0 upgraded, 6 newly installed, 0 to remove and 24 not upgraded.
 Need to get 44.1 MB of archives.
 After this operation, 63.5 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
 WARNING: The following packages cannot be authenticated!
   openjdk-7-jre-lib ca-certificates-java tzdata-java java-common openjdk-7-jre-         headless
  icedtea-7-jre-jamvm
Install these packages without verification [y/N]? y
0% [Connecting to lb.archive.ubuntu.com (91.189.91.13)]

E simplesmente ficou preso em 0%

Editar: Sim, a internet está funcionando bem no meu sistema.

Uma coisa que tentei foi mudar o servidor espelho do qual supostamente está recuperando os pacotes de lb.archives.ubuntu.com para archives.ubuntu.com em /etc/apt/sources.list mas diz que esse arquivo é somente leitura e eu não posso fazer nenhuma alteração nele.

Eu tentei atualizar o apt-get through

apt-get update

mas recebo isso sempre que tento fazer isso:

E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)
E: Unable to lock directory /var/lib/apt/lists/
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

EDIT: Problema resolvido, eu não estava usando sudo apt-get update e estava usando apenas apt-get update

Responder1

O apt-getcomando requer privilégios de root, então você precisa executá-lo com sudo. Por exemplo:

sudo apt-get update

Então você pode instalar seus pacotes:

sudo apt-get install openjdk-7-jre-headless

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