On a systemd host, telnet.service is active and enabled at boot.
Stop it now and prevent it from starting at the next boot.
Which command is appropriate?
systemctl disable --now removes the enablement link and stops the unit immediately. Socket activation may require checking a related socket unit too.
Detailed explanation
systemctl stop telnet.serviceIncorrect. stop does not change the boot-time enablement.
systemctl disable telnet.serviceIncorrect. disable changes boot-time activation but does not stop the active service.
systemctl reload telnet.serviceIncorrect. reload rereads service configuration without stopping or disabling it.
systemctl disable --now telnet.serviceCorrect. It disables boot activation and stops the current service.
Try it yourself
An example you can run in a temporary verification environment.
printf '%s
' 'disable=remove enablement links' '--now=also stop unit now'Expected result
disable=remove enablement links
--now=also stop unit nowKey points
- Combine stop and disable
- Use --now
- Check socket or other activation paths
Notes
- Environment: systemctl構文対応表（unit操作なし）
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.