已解决
参考链接：https://unix.stackexchange.com/question ... -mint-18-2

内容

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
要求内核高于4.11,ubuntu16内核最高好像是4.10，需要自己升级内核版本
两个链接是linux内核链接和下载链接
Makefile文件中把 "export TopDIR ?= ..." is changed to "export TopDIR ?= PATH TO EXTRACTED DIRECTORY" 就是填写当前路径地址
最后一步可能说没有钥匙什么的，需要关闭BIOS中的Secure Boot。关闭之后就OK

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查看系统版本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内核版本：cat /proc/version

Linux version 4.15.0-29-generic