apt-get安装问题

Question

我最近安装了Ubuntu，我一直试图使用apt-get安装一些程序，但它似乎从来都不起作用，甚至apt-get更新也不起作用，下面是我尝试安装一些东西时得到的结果，在本例中:java的jdk-7使用：

apt-get install openjdk-7-jre-headless

我得到的是：

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)] 

它只会被困在0%

编辑:是的，互联网在我的系统上运行得很好。

我尝试过的一件事是更改镜像服务器，它应该从镜像服务器检索/etc/apt/ archives.ubuntu.com中的包到/etc/apt/archives.ubuntu.com，但是它说该文件是只读的，我不能对它做任何更改。

我试着更新了

apt-get update 

但每当我想这么做的时候，我都会得到它：

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?

编辑:问题解决了，我没有使用sudo apt-get更新，而只是使用apt-get更新。

Answer 1

apt-get命令需要根权限，因此您需要使用sudo运行它。例如：

sudo apt-get update

然后，您可以安装您的软件包：

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