I'm using Ubuntu 20.04 here, but these steps work for Ubuntu 18.04 and any other Ubuntu version.

$dir - "$homedir/.electrum/wallets"

Guide: Ubuntu MATE 20.04 LTS is undoubtedly one of the most popular official Ubuntu features.

Ubuntu 16.04 LTS (Ubuntu 16.10 recommended)

If someone's Electrum wallet connects to one of these servers and tries to send a BTC transaction, they see an official message telling them to update their Electrum wallet, as well as a scam URL.

Electrum is a popular software wallet that works by connecting to a dedicated server. These servers receive a hash of the Bitcoin address in the wallet and reply with transaction information. Electrum wallets are fast and have few resources, but by default, it connects to these servers and can easily monitor users. In addition to Electrum, some other software uses public Electrum servers. By 2019, it is a faster and better alternative to BIP37.

(Malware, Attack) Electrum DDoS botnet reaches 152,000 infected hosts.

Electrum DASH "PrivateSend" is on TestNet.

On December 27, Reddit user u/normal_rc reported that Electrum's wallet had been hacked and that nearly 250 bitcoins (243.6 BTCs, nearly $1 million) had been maliciously stolen, coinelegraph reported. Electrum then confirmed that the attack included creating a fake version of the wallet to trick users into providing password information. Electrum responded on Twitter that "this is a persistent phishing attack on Electrum users" and warned users not to download Electrum from any source other than the official website.

Tezos VS Etheruum: Governance - Off-Chain vs Chain.