如何移除/etc/apt/sources.list.d对象？并换方式安装Cassandra

Got it, let's walk through removing that Cassandra APT source from /etc/apt/sources.list.d/ and then cover a couple of alternative installation methods. Here's how to do it step by step:

第一步：移除Cassandra的APT源配置 #

The /etc/apt/sources.list.d/ directory holds separate configuration files for each third-party APT repository. To remove the Cassandra one:

• First, list all files in the directory to find the Cassandra-related config:

  ls /etc/apt/sources.list.d/
  

  Look for a file named something like cassandra.list or cassandra.sources (the exact name depends on how you added it).
• Delete the file using sudo (replace <cassandra-config-file> with the actual filename you found):

  sudo rm /etc/apt/sources.list.d/<cassandra-config-file>
  

• Update your APT cache to clear references to the removed source:

  sudo apt update
  

If you had previously installed Cassandra via APT, you might also want to purge the old installation and clean up residual files:

sudo apt remove --purge cassandra
sudo apt autoremove

第二步：替代安装方式 #

Here are two reliable alternatives to install Cassandra without using the APT source:

方式1：手动安装二进制包 #

This gives you full control over the installation directory and version:

1. Download the binary tarball for your desired Cassandra version (you can grab it from the official Apache Cassandra site):

   wget https://downloads.apache.org/cassandra/<your-desired-version>/apache-cassandra-<your-desired-version>-bin.tar.gz
   

   Replace <your-desired-version> with the actual version number (e.g., 4.1.3).
2. Extract the tarball:

   tar -xzf apache-cassandra-<your-desired-version>-bin.tar.gz
   

3. Move the extracted directory to a permanent location (like /opt):

   sudo mv apache-cassandra-<your-desired-version> /opt/cassandra
   

4. Set up environment variables to make Cassandra commands accessible system-wide. Edit your ~/.bashrc file (or /etc/profile for all users):

   nano ~/.bashrc
   

   Add these lines at the end:

   export CASSANDRA_HOME=/opt/cassandra
   export PATH=$PATH:$CASSANDRA_HOME/bin
   

5. Apply the environment changes:

   source ~/.bashrc
   

6. Start Cassandra (use -f to run in foreground, omit it for background):

   cassandra -f
   

方式2：用Docker安装Cassandra #

If you prefer containerized deployments, Docker is a quick and clean option:

1. First, install Docker if you don't have it already:

   sudo apt install docker.io
   sudo systemctl start docker
   sudo systemctl enable docker
   

2. Pull the Cassandra Docker image for your desired version (use latest for the most recent stable version):

   sudo docker pull cassandra:<your-desired-version>
   

3. Start a Cassandra container (maps port 9042, the default CQL port, to your host machine):

   sudo docker run -d --name cassandra-container -p 9042:9042 cassandra:<your-desired-version>
   

4. Connect to the Cassandra instance using cqlsh inside the container:

   sudo docker exec -it cassandra-container cqlsh
   

内容的提问来源于stack exchange，提问作者MikiBelavista