Apt找不到libasound2-dev 20.04 arm64包

Question

我正在尝试在我的Raspberry 4上新安装的Ubuntu20.04上安装libasound2-dev，但是apt报告说它找不到这个包。

运行apt search libasound2会产生：

ubuntu@ubuntu:~$ sudo apt search libasound2
Sorting... Done
Full Text Search... Done
alsa-topology-conf/now 1.2.2-1 all [installed,local]
  ALSA topology configuration files

libasound2/now 1.2.2-2.1 arm64 [installed,local]
  shared library for ALSA applications

libasound2-data/now 1.2.2-2.1 all [installed,local]
  Configuration files and profiles for ALSA drivers

ubuntu@ubuntu:~$

但是，查看包存储库，它应该可以用于arm64：https://packages.ubuntu.com/focal/libasound2-dev

我的/etc/apt/sources.list在下面(删除注释行之后)。

deb http://ports.ubuntu.com/ubuntu-ports focal main restricted
deb http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted
deb http://ports.ubuntu.com/ubuntu-ports focal universe
deb http://ports.ubuntu.com/ubuntu-ports focal-updates universe
deb http://ports.ubuntu.com/ubuntu-ports focal multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-updates multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-backports main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-security main restricted
deb http://ports.ubuntu.com/ubuntu-ports focal-security universe
deb http://ports.ubuntu.com/ubuntu-ports focal-security multiverse

如果有帮助的话，这个问题似乎并不是libasound2-dev特有的。似乎apt在libdevel部分找不到任何东西。

Answer 1

我注意到/var/lib/apt/lists/中的一些文件是零大小的，所以我运行了：

sudo apt-get clean
sudo apt-get autoclean
sudo rm -rf /var/lib/apt/lists/
sudo apt update

许多零大小的文件都要大得多，运行apt search libasound2-dev可以得到预期的结果。