變更 systemctl 默認編輯器
sudo update-alternatives --config editor
執行結果
root@example:~# sudo update-alternatives --config editor
There are 3 choices for the alternative editor (providing /usr/bin/editor).
Selection Path Priority Status
------------------------------------------------------------
* 0 /bin/nano 40 auto mode
1 /bin/nano 40 manual mode
2 /usr/bin/vim.basic 30 manual mode
3 /usr/bin/vim.tiny 15 manual mode
Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/editor (editor) in manual mode
同檔名優先權
在 /etc/systemd/system 與 /lib/systemd/system 有相同服務檔案名，會優先使用 /etc/systemd/system 路徑中的內容。