E: 包'cassandra'没有安装候选项。

Question

我正在尝试在Ubuntu 14.04上安装Cassandra，在运行以下命令时遇到问题：sudo apt-get install cassandra。

 Reading package lists... Done
 Building dependency tree 
 Reading state information... Done
 Package cassandra 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 'cassandra' has no installation candidate

请帮我解决这个问题。我尝试了一些链接，但都没有成功。我需要在我的电脑上安装cassandra。

- Ishan mahajan

---

这可能会有所帮助 https://docs.datastax.com/en/cassandra/2.0/cassandra/install/installDeb_t.html - Haifeng Zhang

请按照此教程操作，可以完成您的工作：https://hostpresto.com/community/tutorials/how-to-install-apache-cassandra-on-ubuntu-14.04/ - Shubham Namdeo

Answer 1

请确保您按照此处列出的步骤进行操作：http://cassandra.apache.org/download/，如果在运行sudo apt-get update命令时遇到以下错误： GPG error: http://www.apache.org 311x InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A278B781FE4B2BDA 请添加公钥： sudo apt-key adv --keyserver pool.sks-keyservers.net --recv-key A278B781FE4B2BDA 然后再次运行： sudo apt-get update 最后运行： sudo apt-get install cassandra

- Daniel Espinosa

---

对我没用 :( - Achintya Ranjan Chaudhary

Answer 2

在 /etc/apt/sources.list 文件中，找到描述你的 Debian 源仓库的行，在行末添加 contrib non-free。例如： deb http://some.debian.mirror/debian/ $distro main contrib non-free

- Mayank Sharma