Hi folks,
I need help

Im trying to do the 21 inc tutorial and Im not a developer but I would like to do it anyway. Im in the Oracle Virtualbox and 21 inc is saying following:
In our tutorials, we make extensive use of the Bitcoin Core full node, so we need to install it. Type the following command to download the Bitcoin Core software for Linux:TYPE:
wget https://bitcoin.org/bin/bitcoin-core-0.11.0/bitcoin-0.11.0-linux64.tar.gzBut then it is saying...Not Found
What should I do?
Thank you very much in advance

That is because that file does not exist in that directory. Wget is just a command line method to download something. The following file exists (without "-linux64") and will work :
wget https://bitcoin.org/bin/bitcoin-core-0.11.0/bitcoin-0.11.0.tar.gz