Please let me know how to install Adobe Flash Player on Ubuntu 18.04 LTS from command prompt. I tried enabling Canonical Partners repository using the following command without any success:
sudo add-apt-repository "deb http://archive.canonical.com/$(lsb_release -sc) partner"
Here is the error message:
E: Malformed entry 53 in list file /etc/apt/sources.list (Component)
E: The list of sources could not be read.
The command you executed is incorrect.
First, run the following command to remove the malformed entry:
sudo sed -i 's/deb.*partner//g' /etc/apt/sources.list
Next, run the following command to add the partner repository:
sudo add-apt-repository "deb http://archive.canonical.com/ubuntu $(lsb_release -sc) partner"
You can see here that your entry was missing ubuntu and a blank space before $(lsb_release -sc)
Additionally, you will need to enable the multiverse repository. Run the following command:
sudo add-apt-repository multiverse
The following will install all of the flash player plugins for all the different browsers you may use:
sudo apt update
sudo apt install adobe-flash-properties-gtk adobe-flashplugin browser-plugin-freshplayer-pepperflash pepperflashplugin-nonfree
/etc/apt/sources.liston line 53. Most likely, your issue was not on line 53 as my sources list file is not the same as yours. Please include the error message when you ask a question in the future. Thanks! – mchid Sep 01 '19 at 18:47add-apt-repositorycommand, run this command to fix the error:sudo apt install software-properties-commonand then proceed with my instructions below. – mchid Sep 02 '19 at 03:38