参考官方链接:https://support.typora.io/Typora-on-Linux/
Debian/Ubuntu

or use

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA300B7755AFCFAE

安装公钥:推荐这种

wget -qO - https://typora.io/linux/public-key.asc | sudo apt-key add -

添加Typora仓库

sudo add-apt-repository 'deb https://typora.io/linux ./

软件源更新

sudo apt-get update

安装typora

sudo apt-get install typora