Markup Editors for Ubuntu

Refer: https://support.typora.io/Typora-on-Linux/

Debian/Ubuntu

# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA300B7755AFCFAE
wget -qO - https://typora.io/linux/public-key.asc | sudo apt-key add -

# add Typora's repository
sudo add-apt-repository 'deb https://typora.io/linux ./'
sudo apt-get update

# install typora
sudo apt-get install typora

Upgrade

After installing Typora, the typora package will be managed by apt-get, so when your system updates installed packages, or you execute apt-get upgrade, Typora will be updated to latest version.

# upgrade all packages include Typora
sudo apt-get upgrade

Mint

# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA300B7755AFCFAE
wget -qO - https://typora.io/linux/public-key.asc | sudo apt-key add -

# add Typora's repository
echo -e "\ndeb https://typora.io/linux ./" | sudo tee -a /etc/apt/sources.list
sudo apt-get update

# install typora
sudo apt-get install typora

Download deb file manually

You can also manually download and install the deb package file, following those steps:

The deb file is located at https://typora.io/linux/typora_${version}_amd64.deb, for example: https://typora.io/linux/typora_0.9.96_amd64.deb. Just downlad the deb installer at that url.

Double click the deb file to start intsall on Ubuntu / Debian.

Markt Text

Promising but it does not want you to look under the covers to see the source code easily.

Refer: https://marktext.app/