需要安装不能信任的软件包

忽略:15 http://220.112.194.134:9011/ppa.launchpad.net/c3pr90ntc0td/fcitx-team/nightly/ubuntu xenial/main Translation-zh_CN         
忽略:8 http://211.162.74.231:9011/ppa.launchpad.net/c3pr90ntc0td/fcitx-team/nightly/ubuntu xenial/main all Packages                
忽略:15 http://220.112.194.134:9011/ppa.launchpad.net/c3pr90ntc0td/fcitx-team/nightly/ubuntu xenial/main Translation-zh_CN         
忽略:8 http://211.162.74.231:9011/ppa.launchpad.net/c3pr90ntc0td/fcitx-team/nightly/ubuntu xenial/main all Packages                
忽略:8 http://211.162.74.231:9011/ppa.launchpad.net/c3pr90ntc0td/fcitx-team/nightly/ubuntu xenial/main all Packages                
正在读取软件包列表... 完成                                                                                                         
W: 仓库 “http://ppa.launchpad.net/fcitx-team/nightly/ubuntu xenial Release” 没有 Release 文件。
N: 无法认证来自该源的数据，所以使用它会带来潜在风险。
N: 参见 apt-secure(8) 手册以了解仓库创建和用户配置方面的细节。

du@du-T6-3:
~
$cd /etc/apt/sources.list.d/
du@du-T6-3:
/etc/apt/sources.list.d
$ls
aitjcize-ubuntu-manpages-cpp-xenial.list       scootersoftware.list                          steam.list
aitjcize-ubuntu-manpages-cpp-xenial.list.save  scootersoftware.list.save                     steam.list.save
fcitx-team-ubuntu-nightly-xenial.list          scopes-packagers-ubuntu-ppa-xenial.list       xenial-partner.list
fcitx-team-ubuntu-nightly-xenial.list.save     scopes-packagers-ubuntu-ppa-xenial.list.save  xenial-partner.list.save
nilarimogard-ubuntu-webupd8-xenial.list        sogoupinyin.list
nilarimogard-ubuntu-webupd8-xenial.list.save   sogoupinyin.list.save
du@du-T6-3:
/etc/apt/sources.list.d
$sudo rm fcitx-team-ubuntu-nightly-xenial.list
fcitx-team-ubuntu-nightly-xenial.list       fcitx-team-ubuntu-nightly-xenial.list.save
du@du-T6-3:
/etc/apt/sources.list.d
$sudo rm fcitx-team-ubuntu-nightly-xenial.list*
du@du-T6-3:
/etc/apt/sources.list.d
$sudo apt-get clean
du@du-T6-3:
/etc/apt/sources.list.d
$sudo apt-get update
命中:1 http://archive.ubuntukylin.com:10006/ubuntukylin xenial InRelease
命中:2 http://archive.ubuntu.com/ubuntu xenial InRelease
命中:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease
命中:4 http://archive.ubuntu.com/ubuntu xenial-security InRelease
正在读取软件包列表... 完成                       
du@du-T6-3:
/etc/apt/sources.list.d
$sudo apt-get upgrade
正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
正在计算更新... 完成
下列软件包是自动安装的并且现在不需要了：
  libgles1-mesa
使用'sudo apt autoremove'来卸载它(它们)。
下列软件包将被升级：
  activity-log-manager gir1.2-javascriptcoregtk-4.0 gir1.2-webkit2-4.0 libjavascriptcoregtk-4.0-18 libvlc5 libvlccore8
  libwebkit2gtk-4.0-37 libwebkit2gtk-4.0-37-gtk2 logrotate openssh-client unattended-upgrades virtualbox virtualbox-dkms
  virtualbox-qt vlc vlc-data vlc-nox vlc-plugin-notify vlc-plugin-samba zlib1g zlib1g-dev
升级了 21 个软件包，新安装了 0 个软件包，要卸载 0 个软件包，有 0 个软件包未被升级。
需要下载 58.3 MB 的归档。
解压缩后会消耗 482 kB 的额外空间。
您希望继续执行吗？ [Y/n] y
获取:1 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 vlc-plugin-samba i386 2.2.2-5ubuntu0.16.04.2 [6,322 B]
获取:3 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 libvlccore8 i386 2.2.2-5ubuntu0.16.04.2 [433 kB]
获取:2 http://120.198.244.34:9999/archive.ubuntu.com/ubuntu xenial-updates/universe i386 vlc-plugin-notify i386 2.2.2-5ubuntu0.16.04.2 [6,650 B]
获取:4 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 vlc-data all 2.2.2-5ubuntu0.16.04.2 [5,925 kB]
获取:6 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 zlib1g-dev i386 1:1.2.8.dfsg-2ubuntu4.1 [167 kB]                  
获取:5 http://120.198.244.55:9999/archive.ubuntu.com/ubuntu xenial-updates/universe i386 libvlc5 i386 2.2.2-5ubuntu0.16.04.2 [66.7 kB]
获取:7 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 zlib1g i386 1:1.2.8.dfsg-2ubuntu4.1 [52.1 kB]                     
获取:8 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 vlc i386 2.2.2-5ubuntu0.16.04.2 [1,507 kB]                    
获取:9 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 vlc-nox i386 2.2.2-5ubuntu0.16.04.2 [2,325 kB]                
获取:11 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 openssh-client i386 1:7.2p2-4ubuntu2.2 [650 kB]                  
获取:10 http://120.198.244.32:9999/archive.ubuntu.com/ubuntu xenial-updates/main i386 logrotate i386 3.8.7-2ubuntu2.16.04.1 [38.6 kB]
获取:12 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 activity-log-manager i386 0.9.7-0ubuntu23.16.04.1 [117 kB]       
获取:14 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 libwebkit2gtk-4.0-37 i386 2.16.1-0ubuntu0.16.04.2 [11.7 MB]      
获取:13 http://120.198.244.60:9999/archive.ubuntu.com/ubuntu xenial-updates/main i386 libwebkit2gtk-4.0-37-gtk2 i386 2.16.1-0ubuntu0.16.04.2 [9,503 kB]
获取:15 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 libjavascriptcoregtk-4.0-18 i386 2.16.1-0ubuntu0.16.04.2 [3,495 kB]
获取:16 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 gir1.2-webkit2-4.0 i386 2.16.1-0ubuntu0.16.04.2 [67.4 kB]        
获取:17 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 gir1.2-javascriptcoregtk-4.0 i386 2.16.1-0ubuntu0.16.04.2 [21.7 kB]
获取:18 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 unattended-upgrades all 0.90ubuntu0.5 [32.7 kB]                  
获取:19 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 virtualbox-qt i386 5.0.40-dfsg-0ubuntu1.16.04.1 [7,349 kB]
获取:20 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 virtualbox-dkms all 5.0.40-dfsg-0ubuntu1.16.04.1 [623 kB]  
获取:21 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 virtualbox i386 5.0.40-dfsg-0ubuntu1.16.04.1 [14.3 MB]     
已下载 58.3 MB，耗时 3分 2秒 (320 kB/s)                                                                                            
正在预设定软件包 ...