在ubuntu中安装Markdown神器Typora
在终端中执行以下命令即可：
# optional, but recommended
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA300B7755AFCFAE
# add Typora's repository
sudo add-apt-repository 'deb http://typora.io linux/'
sudo apt-get update
# install typora
sudo apt-get install typora
