Install Electrum (Linux) [solved]

[Xillis]

Hello,

I installed the Electrum wallet, but it looks like it installed incorrectly due to it not being connected to any server automatically. I still see it in sync indefinitely, ie not connected. On the other hand, in the menus, the preference does not open when I click on it.
I installed it through the software library. My operating system version is Ubuntu 16.04 LTS

thank you in advance for your help

[bob123]

If i am not mistaken, the version in the package repository of Ubuntu 16.04 is < 3.0.
Therefore it can't connect because it is too outdated.

Head over to https://electrum.org/#download and download the latest version (you can just use the AppImage).
Then verify the signature of the file (scroll down on that page to see how to do it).
And lastly, make the file executable (chmod +x) and run it. 

[BitMaxz]

The Electrum you installed might be corrupted as you said the preferences don't work or grayed out?

Why not try to install the Electrum instead through python?
You can find the guide from Electrum download page here https://electrum.org/#download

Or follow what bob123 suggested above.

[Xillis]

Indeed, the version is lower than 3. I think I installed it, but I do not see the icon. Here is what I got in the terminal for signature verification :

Code:

ophelie@ophelie-Lenovo-G70-80:~$ gpg --import ThomasV.asc.
gpg: impossible d'ouvrir « ThomasV.asc. » : Aucun fichier ou dossier de ce type
gpg: Quantité totale traitée : 0
ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/Electrum-4.0.3.tar.gz.asc
--2020-10-09 18:24:11--  https://download.electrum.org/4.0.3/Electrum-4.0.3.tar.gz.asc
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3034::6812:2710, 2606:4700:3035::6812:2610, 2606:4700:3033::ac43:dd2f, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3034::6812:2710|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : non indiqué [text/plain]
Enregistre : «Electrum-4.0.3.tar.gz.asc»

Electrum-4.0.3.tar.     [ <=>                ]     833  --.-KB/s    ds 0s      

2020-10-09 18:24:11 (4,95 MB/s) - «Electrum-4.0.3.tar.gz.asc» enregistré [833]

ophelie@ophelie-Lenovo-G70-80:~$ gpg --verify Electrum-4.0.3.tar.gz.asc

I don't understand (chmod + x)

[NotATether]

The GPG verification you tried to do above won't work because you tried to import ThomasV.asc. (period at the end). It should be ThomasV.asc with no ending period. Please download it from here: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc

And then try importing the key again.

I don't understand (chmod + x)

He means running

Code:

chmod +x <path-to-Electrum-AppImage-you-downloaded>

in a terminal. This is to make it executable so you can just run

Code:

<path-to-Electrum-AppImage-you-downloaded>

directly to open it (or just click on the AppImage file in a file manager).

[Xillis]

The GPG verification you tried to do above won't work because you tried to import ThomasV.asc. (period at the end). It should be ThomasV.asc with no ending period. Please download it from here: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc

And then try importing the key again.

I have no technical knowledge and I understand absolutely nothing. This code in your link, do I have to copy / paste it in the terminal?

[bob123]

I have no technical knowledge and I understand absolutely nothing. This code in your link, do I have to copy / paste it in the terminal?

You need to open a terminal and enter the path where your AppImage is.
Then enter the command:

Code:

chmod +x NameOfYourFile.AppImage

Afterwards, it can simply be run using:

Code:

./NameOfFile.AppImage

[NotATether]

The GPG verification you tried to do above won't work because you tried to import ThomasV.asc. (period at the end). It should be ThomasV.asc with no ending period. Please download it from here: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc

And then try importing the key again.

I have no technical knowledge and I understand absolutely nothing. This code in your link, do I have to copy / paste it in the terminal?

Alright let me make it simple for you. Paste all this in your terminal to download, verify and run the Electrum 4.0.3 program for Ubuntu (also importing the key in the process).

Code:

wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
gpg --import ThomasV.asc
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
chmod +x electrum-4.0.3-x86_64.AppImage
gpg --verify electrum-4.0.3-x86_64.AppImage.asc

Make sure it says: gpg: Signature made Fri 11 Sep 2020 04:05:35 PM UTC
gpg:                using RSA key 6694D8DE7BE8EE5631BED9502BD5824B7F9470E6
gpg: Good signature from "Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org>" [unknown]
gpg:                 aka "ThomasV <thomasv1@gmx.de>" [unknown]
gpg:                 aka "Thomas Voegtlin <thomasv1@gmx.de>" [unknown]


If it says something different then that means the download has been compromised, you should download it again. But make sure that you at least see RSA key 6694D8DE7BE8EE5631BED9502BD5824B7F9470E6 somewhere in the output, that way you know the download is legit.

Then run:

Code:

./electrum-4.0.3-x86_64.AppImage

This runs Electrum. I tested this on 20.04 LTS, it should work on 16.04 LTS as well. If it doesn't I'll fire up a 16.04 VM and try to diagnose it.

[Xillis]

I'm sorry, but I don't understand, I can't use the terminal. The only choice I am able to do is copy / paste your instructions into the terminal walking me through each step in detail. I'm totally bad at computers.

[Xillis]

The GPG verification you tried to do above won't work because you tried to import ThomasV.asc. (period at the end). It should be ThomasV.asc with no ending period. Please download it from here: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc

And then try importing the key again.

I have no technical knowledge and I understand absolutely nothing. This code in your link, do I have to copy / paste it in the terminal?

Alright let me make it simple for you. Paste all this in your terminal to download, verify and run the Electrum 4.0.3 program for Ubuntu (also importing the key in the process).

Code:

wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
gpg --import ThomasV.asc
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
chmod +x electrum-4.0.3-x86_64.AppImage
gpg --verify electrum-4.0.3-x86_64.AppImage.asc

Make sure it says: gpg: Signature made Fri 11 Sep 2020 04:05:35 PM UTC
gpg:                using RSA key 6694D8DE7BE8EE5631BED9502BD5824B7F9470E6
gpg: Good signature from "Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org>" [unknown]
gpg:                 aka "ThomasV <thomasv1@gmx.de>" [unknown]
gpg:                 aka "Thomas Voegtlin <thomasv1@gmx.de>" [unknown]


If it says something different then that means the download has been compromised, you should download it again. But make sure that you at least see RSA key 6694D8DE7BE8EE5631BED9502BD5824B7F9470E6 somewhere in the output, that way you know the download is legit.

Then run:

Code:

./electrum-4.0.3-x86_64.AppImage

This runs Electrum. I tested this on 20.04 LTS, it should work on 16.04 LTS as well. If it doesn't I'll fire up a 16.04 VM and try to diagnose it.

Here is what I got as a result :

Code:

ophelie@ophelie-Lenovo-G70-80:~$ wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
--2020-10-09 18:53:34--  https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
Résolution de raw.githubusercontent.com (raw.githubusercontent.com)… 151.101.120.133
Connexion à raw.githubusercontent.com (raw.githubusercontent.com)|151.101.120.133|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 4739 (4,6K) [text/plain]
Enregistre : «ThomasV.asc»

ThomasV.asc         100%[===================>]   4,63K  --.-KB/s    ds 0s      

2020-10-09 18:53:34 (34,2 MB/s) - «ThomasV.asc» enregistré [4739/4739]

ophelie@ophelie-Lenovo-G70-80:~$ gpg --import ThomasV.asc
gpg: /home/ophelie/.gnupg/trustdb.gpg : base de confiance créée
gpg: clef 7F9470E6 : clef publique « Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org> » importée
gpg: Quantité totale traitée : 1
gpg:               importées : 1  (RSA: 1)
ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/electrum-4.0.3- x86_64.AppImage
--2020-10-09 18:53:34--  https://download.electrum.org/4.0.3/electrum-4.0.3-
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3034::6812:2710, 2606:4700:3035::6812:2610, 2606:4700:3033::ac43:dd2f, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3034::6812:2710|:443… connecté.
requête HTTP transmise, en attente de la réponse… 404 Not Found
2020-10-09 18:53:34 erreur 404 : Not Found.

--2020-10-09 18:53:34--  http://x86_64.appimage/
Résolution de x86_64.appimage (x86_64.appimage)… échec : Nom ou service inconnu.
wget : impossible de résoudre l’adresse de l’hôte «x86_64.appimage»
ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
--2020-10-09 18:53:34--  https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3033::ac43:dd2f, 2606:4700:3035::6812:2610, 2606:4700:3034::6812:2710, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3033::ac43:dd2f|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : non indiqué [text/plain]
Enregistre : «electrum-4.0.3-x86_64.AppImage.asc»

electrum-4.0.3-x86_     [ <=>                ]     833  --.-KB/s    ds 0s      

2020-10-09 18:53:34 (9,96 MB/s) - «electrum-4.0.3-x86_64.AppImage.asc» enregistré [833]

ophelie@ophelie-Lenovo-G70-80:~$ chmod + x electrum-4.0.3-x86_64.AppImage
chmod: impossible d'accéder à 'x': Aucun fichier ou dossier de ce type
chmod: impossible d'accéder à 'electrum-4.0.3-x86_64.AppImage': Aucun fichier ou dossier de ce type
ophelie@ophelie-Lenovo-G70-80:~$ gpg --verify electrum-4.0.3 -x86_64.AppImage.asc
gpg: impossible d'ouvrir « electrum-4.0.3 »
gpg: verify signatures failed: erreur d'ouverture de fichier
ophelie@ophelie-Lenovo-G70-80:~$ 

[bob123]

I'm sorry, but I don't understand, I can't use the terminal. The only choice I am able to do is copy / paste your instructions into the terminal walking me through each step in detail. I'm totally bad at computers.

You can basically enter each command after the other as mentioned by NotATether:

Code:

wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
gpg --import ThomasV.asc
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
chmod +x electrum-4.0.3-x86_64.AppImage
gpg --verify electrum-4.0.3-x86_64.AppImage.asc

This first downloads ThomasV's (the developer of electrum) key, then imports it into your GPG keyring.
The next two commands download the AppImage and the signature file.
The 5th command makes the AppImage executable and the last one verifys the signature.

Then, if you see the following line in the output, you are fine:

Code:

gpg: Good signature from "Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org>" [unknown]

Afterwards you can run electrum.




You had a typo:

Code:

wget https://download.electrum.org/4.0.3/electrum-4.0.3- x86_64.AppImage

There should be no space in the filename.
Therefore it couldn't find the URL and gave you a 404 error. Try again (preferably with copy/pasting).

Instead of:

Code:

wget https://download.electrum.org/4.0.3/electrum-4.0.3- x86_64.AppImage

do:

Code:

wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage

[NotATether]

Here is what I got as a result :

The reason you got this output:

Code:

ophelie@ophelie-Lenovo-G70-80:~$ gpg --verify electrum-4.0.3 -x86_64.AppImage.asc
gpg: impossible d'ouvrir « electrum-4.0.3 »
gpg: verify signatures failed: erreur d'ouverture de fichier

is because you ran gpg --verify electrum-4.0.3 -x86_64.AppImage.asc. There shouldn't be any spaces in the file name. Please run

Code:

gpg --verify electrum-4.0.3-x86_64.AppImage.asc

(no space between electrum-4.0.3 and -x86_64.AppImage.asc), and it should verify correctly.

Also,

Code:

ophelie@ophelie-Lenovo-G70-80:~$ chmod + x electrum-4.0.3-x86_64.AppImage
chmod: impossible d'accéder à 'x': Aucun fichier ou dossier de ce type
chmod: impossible d'accéder à 'electrum-4.0.3-x86_64.AppImage': Aucun fichier ou dossier de ce type

There shouldn't be a space between + and x. You should run

Code:

chmod +x electrum-4.0.3-x86_64.AppImage

(+x, not + x), and that command should work too.

Then you will be able to run Electrum.

[Xillis]

Code:

ophelie@ophelie-Lenovo-G70-80:~$ wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
--2020-10-09 19:11:15--  https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
Résolution de raw.githubusercontent.com (raw.githubusercontent.com)… 151.101.120.133
Connexion à raw.githubusercontent.com (raw.githubusercontent.com)|151.101.120.133|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 4739 (4,6K) [text/plain]
Enregistre : «ThomasV.asc.3»

ThomasV.asc.3       100%[===================>]   4,63K  --.-KB/s    ds 0s      

2020-10-09 19:11:15 (38,1 MB/s) - «ThomasV.asc.3» enregistré [4739/4739]

ophelie@ophelie-Lenovo-G70-80:~$ gpg --import ThomasV.asc
gpg: clef 7F9470E6 : « Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org> » n'est pas modifiée
gpg: Quantité totale traitée : 1
gpg:              non modifiées : 1
ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
--2020-10-09 19:11:15--  https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3033::ac43:dd2f, 2606:4700:3035::6812:2610, 2606:4700:3034::6812:2710, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3033::ac43:dd2f|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 50941928 (49M)
Enregistre : «electrum-4.0.3-x86_64.AppImage.1»

electrum-4.0.3-x86_ 100%[===================>]  48,58M  1,95MB/s    ds 25s     

2020-10-09 19:11:40 (1,92 MB/s) - «electrum-4.0.3-x86_64.AppImage.1» enregistré [50941928/50941928]

ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
--2020-10-09 19:11:40--  https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3034::6812:2710, 2606:4700:3033::ac43:dd2f, 2606:4700:3035::6812:2610, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3034::6812:2710|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : non indiqué [text/plain]
Enregistre : «electrum-4.0.3-x86_64.AppImage.asc.3»

electrum-4.0.3-x86_     [ <=>                ]     833  --.-KB/s    ds 0s      

2020-10-09 19:11:40 (12,8 MB/s) - «electrum-4.0.3-x86_64.AppImage.asc.3» enregistré [833]

ophelie@ophelie-Lenovo-G70-80:~$ chmod + x electrum-4.0.3-x86_64.AppImage
chmod: impossible d'accéder à 'x': Aucun fichier ou dossier de ce type
ophelie@ophelie-Lenovo-G70-80:~$ gpg --verify electrum-4.0.3-x86_64.AppImage.asc 

[bob123]

ophelie@ophelie-Lenovo-G70-80:~$ chmod + x electrum-4.0.3-x86_64.AppImage
chmod: impossible d'accéder à 'x': Aucun fichier ou dossier de ce type

Almost..

It is

Code:

chmod +x electrum-4.0.3-x86_64.AppImage

instead of

Code:

chmod + x electrum-4.0.3-x86_64.AppImage

Please be careful when entering commands. Each character is important.

[Xillis]

Here is the code that I was given and corrected based on your remarks. I don't understand this code so if there is a false line, please correct the code for me:

Code:

wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
gpg --import ThomasV.asc
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
chmod +x electrum-4.0.3-x86_64.AppImage
gpg --verify electrum-4.0.3-x86_64.AppImage.asc

My result :

Code:

ophelie@ophelie-Lenovo-G70-80:~$ wget https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
--2020-10-09 19:23:11--  https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc
Résolution de raw.githubusercontent.com (raw.githubusercontent.com)… 151.101.120.133
Connexion à raw.githubusercontent.com (raw.githubusercontent.com)|151.101.120.133|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 4739 (4,6K) [text/plain]
Enregistre : «ThomasV.asc.5»

ThomasV.asc.5       100%[===================>]   4,63K  --.-KB/s    ds 0s      

2020-10-09 19:23:11 (32,0 MB/s) - «ThomasV.asc.5» enregistré [4739/4739]

ophelie@ophelie-Lenovo-G70-80:~$ gpg --import ThomasV.asc
gpg: clef 7F9470E6 : « Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org> » n'est pas modifiée
gpg: Quantité totale traitée : 1
gpg:              non modifiées : 1
ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
--2020-10-09 19:23:11--  https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3035::6812:2610, 2606:4700:3033::ac43:dd2f, 2606:4700:3034::6812:2710, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3035::6812:2610|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 50941928 (49M)
Enregistre : «electrum-4.0.3-x86_64.AppImage.3»

electrum-4.0.3-x86_ 100%[===================>]  48,58M  1,95MB/s    ds 25s     

2020-10-09 19:23:37 (1,93 MB/s) - «electrum-4.0.3-x86_64.AppImage.3» enregistré [50941928/50941928]

ophelie@ophelie-Lenovo-G70-80:~$ wget https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
--2020-10-09 19:23:37--  https://download.electrum.org/4.0.3/electrum-4.0.3-x86_64.AppImage.asc
Résolution de download.electrum.org (download.electrum.org)… 2606:4700:3034::6812:2710, 2606:4700:3033::ac43:dd2f, 2606:4700:3035::6812:2610, ...
Connexion à download.electrum.org (download.electrum.org)|2606:4700:3034::6812:2710|:443… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : non indiqué [text/plain]
Enregistre : «electrum-4.0.3-x86_64.AppImage.asc.5»

electrum-4.0.3-x86_     [ <=>                ]     833  --.-KB/s    ds 0s      

2020-10-09 19:23:37 (8,50 MB/s) - «electrum-4.0.3-x86_64.AppImage.asc.5» enregistré [833]

ophelie@ophelie-Lenovo-G70-80:~$ chmod +x electrum-4.0.3-x86_64.AppImage
ophelie@ophelie-Lenovo-G70-80:~$ gpg --verify electrum-4.0.3-x86_64.AppImage.asc 

[NotATether]

Here is the code that I was given and corrected based on your remarks. I don't understand this code so if there is a false line, please correct the code for me:

You're good! now to open Electrum, run

Code:

./electrum-4.0.3-x86_64.AppImage

in the terminal, and that's it.

You can also go to your file manager, to the Home folder, and look for the a file called electrum-4.0.3-x86_64.AppImage, and double-click on it to run it. That is the second way you can run the program.

You may see in your Home folder files ending in .1, .2, .3 and so on; those can be safely deleted.

[Xillis]

The installation took place correctly and the server is connected, on the other hand, I do not see an icon and I have to click on the file to be executed to open the application.

[NotATether]

The installation took place correctly and the server is connected, on the other hand, I do not see an icon and I have to click on the file to be executed to open the application.

Use the .desktop file I created at how to create a shortcut to electrum btc wallet to make the shortcut.

1. Create an empty text file called electrum.desktop (save it inside your home folder, like /home/ophelie

2. Paste the following contents in this file, and save it:

Code:

[Desktop Entry]
Comment=Lightweight Bitcoin Client
Exec=/home/ophelie/electrum-4.0.3-x86_64.AppImage %u
GenericName[en_US]=Bitcoin Wallet
GenericName=Bitcoin Wallet
Icon=/home/ophelie/electrum.png
Name[en_US]=Electrum Bitcoin Wallet
Name=Electrum Bitcoin Wallet
Categories=Office;Finance;Network;
StartupNotify=true
StartupWMClass=electrum
Terminal=false
Type=Application
MimeType=x-scheme-handler/bitcoin;

For the icon to work, you need to download it from https://i.imgur.com/zx4CmVi.png to your Home folder and rename it to electrum.png

3. Open a terminal and run the following command to create a shortcut:

Code:

desktop-file-install --dir=$HOME/.local/share/applications electrum.desktop

This installs the shortcut on Activities or any other start menu you are using. It only installs it for the current users, not for other users that might use the computer (I assume you are the only user of your computer).

Now you should be able to access Electrum by going to Activities menu and clicking on Electrum Bitcoin Wallet, or it might be under Office > Electrum Bitcoin Wallet.

Do not move the electrum-4.0.3-x86_64.AppImage or electrum.png file. If you move the AppImage, then the shortcut will no longer work, it will try to run electrum at a folder it's not located in. If you move the Electrum icon, then it won't show an icon anymore. If keeping the files in the home folder is a nuisance for you, I can work out a solution that puts the files in the hidden .local folder.

4. The electrum.desktop file you created earlier is no longer needed (it made a copy of it in a system folder), you can safely delete the one you created.

If you ever want to delete the shortcut, just run in a terminal:

Code:

rm ~/.local/share/applications/electrum.desktop

and then the shortcut will be gone.

[Abdussamad]

The GPG verification you tried to do above won't work because you tried to import ThomasV.asc. (period at the end). It should be ThomasV.asc with no ending period. Please download it from here: https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc

And then try importing the key again.

I have no technical knowledge and I understand absolutely nothing. This code in your link, do I have to copy / paste it in the terminal?

switch to windows. if you have no technical knowledge and aren't willing to learn then you have no business using ubuntu.

[joniboini]

The installation took place correctly and the server is connected, on the other hand, I do not see an icon and I have to click on the file to be executed to open the application.

As far as I can remember, AppImage does not require any installation. You seems to have successfully make it executable which is why you can run the app. No icon is expected and is not a big problem imo.