• System has not been booted with systemd as init system (PID 1). Can’t operate. Failed to connect to bus: Host is down

$ sudo apt install daemonize dbus-user-session fontconfig
$ sudo daemonize /usr/bin/unshare --fork --pid --mount-proc /lib/systemd/systemd --system-unit=basic.target
$ exec sudo nsenter -t $(pidof systemd) -a su - $LOGNAME
$ snap version
// 서비스 목록 확인하기
$> service --status-all

[+] running, [-] stopped service

• wsl에서 systemctl 실패할 때