Want a clean start? Re-using existing server? Forked blockchain?
To delete your local git repo, and then rename or remove your previous $NODE_HOME and cold-keys directories, type:
$NODE_HOME
cold-keys
rm -rf $HOME/git/cardano-node/ $HOME/git/libsodium/ mv $NODE_HOME $(basename $NODE_HOME)_backup_$(date -I) mv $HOME/cold-keys $HOME/cold-keys_backup_$(date -I)
Then, you can start your installation again from the .