如何在Ubuntu 11.04中安装autoconf？

Question

当我尝试通过以下命令在Ubuntu 11.04中安装autoconf时

sudo apt-get install autoconf

此错误来了

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package autoconf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'autoconf' has no installation candidate

如何删除此错误并安装它？

Answer 1

它对我有用。确保通过运行来更新：

sudo apt-get update

这可能是个问题。

Answer 2

如果有活跃的话。

sudo ufw disable
sudo apt-get update
sudo apt-get install autoconf
sudo ufw enable

Answer 3

启用软件源选项卡中的复选框（在系统设置下）