在我将 Debian 10 升级到 11 之后,不知什么原因,我的 Mailman 服务被屏蔽了:
# service status mailman
status: unrecognized service
root@tester1:~# service mailman status
● mailman.service
Loaded: masked (Reason: Unit mailman.service is masked.)
Active: inactive (dead)
有人能告诉我如何揭露这项服务吗,谢谢?