I have elasticsearch installed on my Ubuntu installation (18.04 on WSL), which uses SysV.
I installed it using the instructions https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html
I want to uninstall it but am getting an error when I use sudo apt-get purge --autoremove elasticsearch
Removing elasticsearch (6.4.2) ...
Stopping elasticsearch service...System has not been booted with systemd as init system (PID 1). Can't operate.
dpkg: error processing package elasticsearch (--remove):
installed elasticsearch package pre-removal script subprocess returned error exit status 1
System has not been booted with systemd as init system (PID 1). Can't operate.
### 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
Errors were encountered while processing:
elasticsearch
E: Sub-process /usr/bin/dpkg returned an error code (1)
I have ensured that the service elasticsearch start and stop commands work, and that the service is stopped.
I have tried the commands that the error message suggests, but as my system does not use systemd , they do not work:
$ sudo systemctl daemon-reload
[sudo] password for you:
System has not been booted with systemd as init system (PID 1). Can't operate.
$ sudo systemctl enable elasticsearch.service
Synchronizing state of elasticsearch.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable elasticsearch
Created symlink /etc/systemd/system/multi-user.target.wants/elasticsearch.service → /usr/lib/systemd/system/elasticsearch.service.
$ sudo systemctl start elasticsearch
System has not been booted with systemd as init system (PID 1). Can't operate.
$ sudo apt purge --autoremove elasticsearch
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
elasticsearch*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 168 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 37566 files and directories currently installed.)
Removing elasticsearch (6.5.4) ...
Stopping elasticsearch service...System has not been booted with systemd as init system (PID 1). Can't operate.
dpkg: error processing package elasticsearch (--remove):
installed elasticsearch package pre-removal script subprocess returned error exit status 1
System has not been booted with systemd as init system (PID 1). Can't operate.
### 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
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
The service is already running (SysV way):
$ sudo -i service elasticsearch status
* elasticsearch is running
Yet the uninstall continues to complain like this that init system is not used...
How do I uninstall?