Chris 🇹🇼 | Telegram 尼有事嗎 says to YSITD
apt update Hit:1 http://mirror01.idc.hinet.net/ubuntu xenial InRelease Get:2 http://mirror01.idc.hinet.net/ubuntu xenial-updates InRelease [95.7 kB] Hit:3 http://mirror01.idc.hinet.net/ubuntu xenial-backports InRelease Hit:4 http://download.zerotier.com/debian/xenial xenial InRelease Hit:5 http://security.ubuntu.com/ubuntu xenial-security InRelease Fetched 95.7 kB in 0s (149 kB/s) Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date. N: Ignoring file '50unattended-upgrades.ucf-old' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension