我在 Ubuntu 14.04 上安装了 elasticsearch 6.6.1，但遇到了一些困难。我希望完全卸载 elasticsearch 并安装旧版本。当我运行
sudo apt-get --purge autoremove elasticsearch
弹出错误信息：
Removing elasticsearch (6.6.1) ...
Stopping elasticsearch service...Failed to issue method call: Unit elasticsearch.service not loaded.
dpkg: error processing package elasticsearch (--remove):
subprocess installed pre-removal script returned error exit status 5
Failed to issue method call: Unit systemd-sysctl.service failed to load: No such file or directory. See system logs and 'systemctl status systemd-sysctl.service' for details.
### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using systemd
sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service
### You can start elasticsearch service by executing
sudo systemctl start elasticsearch.service
chown: cannot access ‘/var/lib/elasticsearch’: No such file or directory
dpkg: error while cleaning up:
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
elasticsearch
我不确定 elasticseach.service 是否可用，因为我认为我没有该文件。我也已经使用过
sudo rm -rf /var/lib/elasticsearch/
sudo rm -rf /etc/elasticsearch
我尝试重新安装 elasticsearch，然后使用卸载，但使用 apt-get install elasticsearch 出现了类似的错误：
Setting up elasticsearch (6.6.1) ...
Failed to issue method call: Unit systemd-sysctl.service failed to load: No such file or directory. See system logs and 'systemctl status systemd-sysctl.service' for details.
chown: cannot access ‘/var/lib/elasticsearch’: No such file or directory
dpkg: error processing package elasticsearch (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
elasticsearch
E: Sub-process /usr/bin/dpkg returned an error code (1)
在我意识到我应该使用 apt-get 来删除 elasticsearch 之前，我不确定我是否搞砸了。任何帮助都非常感谢！
答案1
我沿着错误信息走得很艰难，但最终我使用了
ls -l /var/lib/dpkg/info | grep -I elasticsearch
然后删除这些文件。这解决了一直出现的 dpkg 错误 1。使用后sudo apt-get updateelasticsearch 似乎不再在服务器上。
这是这里发布的最后一个解决方案https://itsfoss.com/dpkg-returned-an-error-code-1/如果您遇到类似的卸载错误，您可以先尝试其他解决方案。