Flashplayer Manual (Offline) Install -Terminal (ubuntu)

Flashplayer Manual install -Terminal (ubuntu)

for error "unplayable period"

Step1:
sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

Step2:
sudo apt update

Step3:
sudo apt -y upgrade

Step4:
sudo apt install adobe-flashplugin

Step5:
sudo apt-get install browser-plugin-freshplayer-pepperflash