Debian手动删除PPA订阅

xfox@ThinkPadE14Gen3:~$ cd /etc/apt/sources.list.d
xfox@ThinkPadE14Gen3:/etc/apt/sources.list.d$ ls
tailscale.list vscode.list vscode.list.save
xfox@ThinkPadE14Gen3:/etc/apt/sources.list.d$ rm tailscale.list
rm: 是否删除有写保护的普通文件 'tailscale.list'？y
rm: 无法删除 'tailscale.list': 权限不够xfox@ThinkPadE14Gen3:/etc/apt/sources.list.d$ sudo rm tailscale.list
[sudo] xfox 的密码：xfox@ThinkPadE14Gen3:/etc/apt/sources.list.d$

n2n使我快乐，而tailscale的PPA总是在更新apt cache的时候恶心我;)那就给我爬！