Hmm, the cat/concatenate should not have broken the node like this… it also looks like the directory you have an extra /lnd//lnd there…
Are you on Raspberry Pi 4 or Linux installation? Can you SSH into your node or reach it via the IP in your browser’s address bar instead?
I can further assist you over telegram if you’d like to message me there for more real-time assistance? My telegram profile is: https://t.me/usernameisJim
Here are also full instructions on changing your node alias,
To change your Lightning Node’s alias, we’ll need to SSH in and edit the lnd.conf file
If we are on version 0.5 or later use this command:
sudo nano umbrel/app-data/lightning/data/lnd/lnd.conf
You’ll then see the contents of your lnd.conf displayed.
You can use your arrow keys to navigate and write on a new line some below [Application Options]
Add the line:
Replacing SOMENAME with your desired Lightning Node Alias.
(Optional) set color=#ff0000 or any other hex color, on a new line, just below alias. find a nice color
As per the controls you can now use CTRL+X to exit the file, the ^ caret corresponds to the CTRL key for all the commands listed.
The command line will now ask you “Save modified buffer?”
You may type Y for yes, it will then ask you File Name to Write, just hit enter to proceed without changing the filename.
You may now restart your node, preferably from the UI by going System > Restart
You’ll see on your node apps your alias has been updated, for any public channels it may take ~2 days to aggregate the change across the network graph.
(As a disclaimer, be advised adding an alias comes with some tradeoffs of anonymity)