Ubuntu

1. notepad++

• install

sudo add-apt-repository ppa:notepadqq-team/notepadqq
sudo apt-get update
sudo apt-get install notepadqq

• remove

sudo apt-get remove notepadqq
sudo add-apt-repository --removeppa:notepadqq-team/notepadqq

2. sublime

wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add -
echo "deb https://download.sublimetext.com/ apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list
sudo apt-get update
sudo apt-get install sublime-text --fix-missing 

3. Adobe Flash Player

# 1. 启用Canonical Partners Repository存储库
#  最新的Flash插件位于Canonical Partners的存储库中，
#  默认情况下它是处于禁用状态，必须在尝试安装Flash插件之前启用此存储库。
sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

# 2. install
sudo apt update
sudo apt install adobe-flashplugin browser-plugin-freshplayer-pepperflash

# 3. restart firefox

4. markdonw - typora

# optional, but recommended 
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA300B7755AFCFAE 

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

# install typora 
sudo apt-get install typora

5. markdown - Remarkable

https://remarkableapp.github.io/linux/download.html

wget https://remarkableapp.github.io/files/remarkable_1.87_all.deb
dpkg -i remarkable_1.87_all.deb
apt-get install -f -y