The command lines given in Get Configuration Files are
wget https:...testnet-config.json
wget https:...testnet-shelley-genesis.json
wget https:...testnet-byron-genesis.json
wget https:...testnet-topology.json
Then we move on to Start your node where the commands given are
cardano-node run \
--topology shelley_testnet-topology.json \
--database-path db \
--socket-path db/node.socket \
--host-addr x.x.x.x \
--port 3001 \
--config shelley_testnet-config.json
There is a discrepancy between the downloaded files and the files used for topology and config. The commands as given do not work, as they reference files that do not exist.
I changed the topology and config FILEPATHs to instead reference the files downloaded which gives (my ip is excluded for this post)
cardano-node run \
--topology testnet-topology.json \
--database-path db \
--socket-path db/node.socket \
--host-addr x.x.x.x \
--port 3001 \
--config testnet-config.json