第一步：

run the command(s) below:??????? （編輯如下文件）

sudo vi /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf

Add the following line, save and then close.???? （在文件中加上下面這句）

allow-guest=false

Reboot, and you're set.

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第二步：

Thanks to Gunnar Hjalmarsson

Based on Gunnar Hjalmarsson comment "ubuntu-session was last updated in the middle of March. Try sudo apt-get install --reinstall ubuntu-session" when that is done, the Guest session returns.????? （第一步不是狠完善，guest可以通過某些命令恢復）

After some research, this can be done a different way as well.?????? （除了第一步外，下面這步也操作下）

Open /etc/lightdm/lightdm.conf file from your terminal using the following command:?????

sudo -H vi /etc/lightdm/lightdm.conf

If the file exists, then just add the following line:

allow-guest=false

Otherwise copy and paste the following into it:??? （如果文件不存在，則新建并加上如下的行）

[SeatDefaults] user-session=ubuntu greeter-session=unity-greeter allow-guest=false

Save the file and exit the editor. Reboot your system, and the changes will remain even after an update to ubuntu-session as mentioned by Gunnar Hjalmarsson's comment.

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轉載于:https://www.cnblogs.com/welhzh/p/8280371.html

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