Ubuntu
Netplan
Ethernet (Dynamic IP) network: version: 2 ethernets: eth0: dhcp4: t...
iptables as firewall
Setup iptables as a firewall. Drop packages from INPUT chain by default. However, we have to all...
Never use snap firefox
#!/bin/bash if [[ $(id -u) == 0 ]] then snap remove firefox add-apt-repository ppa:mozil...
Disable Ubuntu Server sleep
systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
The public key is not available
Error occurred. The following signatures couldn't be verified because the public key is not ava...
speech-dispatcher makes all audio crackle
Symptom speech-dispatcher package causes audio from speaker crackle (noise and delay) since Ubunt...
Resolve: NVIDIA Ghost Monitor
Resolve: NVIDIA Ghost Monitor
YubiKey
Chekc YubiKey by Yubico on online website. Login with GDM (U2F) Install libraries apt install lib...
Google Authenticator with PAM
GDM Login with TOTP Install libraries sudo apt install libpam-google-authenticator Generate a sec...