Raspberry pi Danetd錯誤 訊息 danted.service: Failed at step NAMESPACE spawning

編輯 /lib/systemd/system/danted.service
修改 ReadOnlyDirectories=/bin /etc /lib /lib64 /sbin /usr /var
為 ReadOnlyDirectories=/bin /etc /lib -/lib64 /sbin /usr /var

重新執行
systemctl daemon-reload
/etc/init.d/danted start