问题：缺微软公钥

解决方案：

1.安装curl

sudo apt install curl

2.执行命令

curl -fsSL https://packages.microsoft.com/keys/microsoft.asc | sudo gpg --dearmor -o /usr/share/keyrings/microsoft-archive-keyring.gpg

3.重新写入源配置

echo "deb [arch=amd64 signed-by=/usr/share/keyrings/microsoft-archive-keyring.gpg] https://packages.microsoft.com/repos/code stable main" | sudo tee /etc/apt/sources.list.d/vscode.list

4.更新

sudo apt update