在Mastodon安装最后一步，会遇到：
failed to enable unit: unit file mastodon-\x2a.service does not exist.
解决方法贴在这里，备用：
systemctl enable mastodon-web mastodon-sidekiq mastodon-streaming
(just replace the start with enable) or if you want to write it out:
systemctl enable mastodon-web
systemctl enable mastodon-sidekiq
systemctl enable mastodon-streaming
Notes (also for the docs):
Not all shells accept auto-completion for systemctl and are just trying to start a service named mastodon-* (where the \x2a is the escaped ascii code from *)
