neon配置flatpak国内的源，并安装octave 8.2

https://www.cnblogs.com/guochaoxxl/p/17494602.html

点击查看代码

sudo flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
wget https://mirror.sjtu.edu.cn/flathub/flathub.gpg
sudo flatpak remote-modify --gpg-import=flathub.gpg flathub
sudo flatpak remote-modify flathub --url=https://mirror.sjtu.edu.cn/flathub