已解決
參考鏈接：https://unix.stackexchange.com/question ... -mint-18-2
內容
Worked solution (Requirements: kernel >=4.11) :
Download driver directory from this repo: https://github.com/endlessm/linux/tree/ ... /rtl8821ce
You can do it by this link: https://minhaskamal.github.io/DownGit/# ... /rtl8821ce
Unpack zip archive.
Change the Makefile. Line "export TopDIR ?= ..." is changed to " export TopDIR ?= PATH TO EXTRACTED DIRECTORY".
make
sudo make install
sudo modprobe -a 8821ce
要求內核高於4.11,ubuntu16內核最高好像是4.10，需要自己升級內核版本
兩個鏈接是linux內核鏈接和下載鏈接
Makefile文件中把 "export TopDIR ?= ..." is changed to "export TopDIR ?= PATH TO EXTRACTED DIRECTORY" 就是填寫當前路徑地址
最后一步可能說沒有鑰匙什么的，需要關閉BIOS中的Secure Boot。關閉之后就OK
查看系統版本sudo lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial
查看linux內核版本：cat /proc/version
Linux version 4.15.0-29-generic