Copy/paste as before. All one single command.
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
Key server Successful
Copy/paste same as before. This will take time to install depending on your connection speed. All one command. Report back.
echo “deb https://download.mono-project.com/repo/debian stable-raspbianbuster main” | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
You will notice the difference in your success now. You are correctly copy/pasting as a single command. As soon as Mono is installed report back.
What connection speed do you have.
Not sure of connection speed but mono-project finished very quickly
I can’t believe you stuck with me this long I am very appreciative
Next copy/paste
sudo apt update
Report back
E:The deb is not known on line 1 in source list /ect/apt/sources.d/mono-official-stable.list
E: The list of sources could not be read
Now copy/paste the following block. Again this is one command. This will take some time depending on your speed. I’ll say it again, it’s one single command so make sure you copy/paste everything in one go. Just let me know if it’s executing.
sudo apt-get install mono-runtime libmono-corlib2.0-cil libmono-system-web4.0-cil libmono-system-numerics4.0-cil libmono-system-serviceprocess4.0-cil libmono-system-data4.0-cil libmono-system-core4.0-cil libmono-system-servicemodel4.0a-cil libmono-windowsbase4.0-cil libmono-system-runtime-serialization-formatters-soap4.0-cil libmono-system-runtime-serialization4.0-cil libmono-system-xml-linq4.0-cil mono-dmcs
Ok stop for the moment.
Copy/paste the following
sudo apt update
Same result deb is not known
Copy/paste the following and tell me the output
echo “deb https://download.mono-project.com/repo/debian stable-raspbianbuster main” | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
Ok. Copy/paste
sudo apt update
report back
E: type '"deb is not known on line 1 again
Not sure if significant but the command for download. mono-project that you thought would take time to finish completed almost instantly
I have not yet pasted the large block command that you wanted me to hold up on sudo apt-get install mono-runtime libmono-corlib2.0-cil libmono-system-web4.0-cil libmono-system-numerics4.0-cil libmono-system-serviceprocess4.0-cil libmono-system-data4.0-cil libmono-system-core4.0-cil libmono-system-servicemodel4.0a-cil libmono-windowsbase4.0-cil libmono-system-runtime-serialization-formatters-soap4.0-cil libmono-system-runtime-serialization4.0-cil libmono-system-xml-linq4.0-cil mono-dmcs
Not important
Now copy/paste the following into PuTTY. It will open a file. Copy/paste that screen and post the output here
sudo nano /etc/apt/sources.list