Sass 吞咽错误：未找到：通知发送（Ubuntu）

我试图在Ubuntu18.04操作系统上用gulp编译scss主题，我得到了以下错误：

Error: not found: notify-send
    at getNotFoundError (/home/user/stack-admin-v4.0/stack-admin/node_modules/which/which.js:13:12)
    at Function.whichSync [as sync] (/home/user/stack-admin-v4.0/stack-admin/node_modules/which/which.js:134:9)
    at NotifySend.notify (/home/user/stack-admin-v4.0/stack-admin/node_modules/node-notifier/notifiers/notifysend.js:65:27)
    at notifyCssTask (/home/user/stack-admin-v4.0/stack-admin/gulp-tasks/notify.js:5:21)
    at bound (domain.js:419:14)
    at runBound (domain.js:432:12)
    at asyncRunner (/home/user/stack-admin-v4.0/stack-admin/node_modules/async-done/index.js:55:18)
    at processTicksAndRejections (internal/process/task_queues.js:76:11)

---

为了解决这个问题，我必须安装

libnotify-bin

：

sudo apt update
sudo apt install libnotify-bin