I try uninstall it harder, and I fond something odd: (I reinstalled avahi-daemon and rebooted ) (After I rebooted my pc successfully, I did "sudo systemctl stop avahi-daemon.service avahi-daemon.socket"), and then
chen@MSI-Ubuntu:~$ sudo apt-get purge avahi-daemon 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 下列软件包将被【卸载】： avahi-daemon* libnss-mdns* 升级了 0 个软件包，新安装了 0 个软件包，要卸载 2 个软件包，有 0 个软件包未被升级。 解压缩后将会空出 501 kB 的空间。 您希望继续执行吗？ [Y/n] y (正在读取数据库 ... 系统当前共安装有 339528 个文件和目录。) 正在卸载 libnss-mdns:amd64 (0.10-6) ... libnss-mdns.postrm: Checking NSS setup... libnss-mdns.postrm: Removing mdns from NSS setup 正在清除 libnss-mdns:amd64 (0.10-6) 的配置文件 ... 正在卸载 avahi-daemon (0.6.31-4ubuntu4) ... Warning: Stopping avahi-daemon.service, but it can still be activated by: avahi-daemon.socket 正在清除 avahi-daemon (0.6.31-4ubuntu4) 的配置文件 ... userdel: user avahi is currently used by process 3300 /usr/sbin/deluser："/usr/sbin/userdel avahi"返回错误代码 8，退出。 /usr/sbin/delgroup: "avahi"仍以"avahi"作为他们的首选组! rmdir: 删除 "/var/run/avahi-daemon" 失败: 目录非空 正在处理用于 libc-bin (2.21-0ubuntu4) 的触发器 ... 正在处理用于 dbus (1.8.12-1ubuntu5) 的触发器 ... 正在处理用于 man-db (2.7.0.2-5) 的触发器 ... chen@MSI-Ubuntu:~$ cat /var/run/avahi-daemon/ cat: /var/run/avahi-daemon/: 权限不够 chen@MSI-Ubuntu:~$ sudo cat /var/run/avahi-daemon/* cat: /var/run/avahi-daemon/*: 没有那个文件或目录 chen@MSI-Ubuntu:~$ cd /var/run chen@MSI-Ubuntu:/var/run$ cd avahi-daemon/ bash: cd: avahi-daemon/: 权限不够 chen@MSI-Ubuntu:/var/run$ sudo su root@MSI-Ubuntu:/run# cd avahi-daemon/ root@MSI-Ubuntu:/run/avahi-daemon# ls pid socket root@MSI-Ubuntu:/run/avahi-daemon# cat pid 3299 root@MSI-Ubuntu:/run/avahi-daemon# The pid file on /run/avahi-daemon value is 3299 , and root@MSI-Ubuntu:/run/avahi-daemon# ps -aux | grep avahi avahi 3299 0.0 0.0 30312 3164 ? Ss 21:26 0:00 avahi-daemon: running [MSI-Ubuntu.local] avahi 3300 0.0 0.0 30188 240 ? S 21:26 0:00 avahi-daemon: chroot helper root 4340 0.0 0.0 11192 2336 pts/0 S+ 21:35 0:00 grep --color=auto avahi So I may think the command "sudo systemctl stop avahi-daemon.service avahi-daemon.socket" not work. Because It not kill the avahi-daemon process, So I can't remove the package avahi-daemon. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to avahi in Ubuntu. https://bugs.launchpad.net/bugs/1502438 Title: package avahi-daemon 0.6.31-4ubuntu4 failed to install/upgrade: 子进程 已安装 pre-removal 脚本 返回错误状态 1 Status in avahi package in Ubuntu: New Bug description: 正在卸载 avahi-daemon (0.6.31-4ubuntu4) ... Job for avahi-daemon.service canceled. invoke-rc.d: initscript avahi-daemon, action "stop" failed. dpkg: 处理软件包 avahi-daemon (--purge)时出错： 子进程 已安装 pre-removal 脚本 返回错误状态 1 update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults 在处理时有错误发生： avahi-daemon E: Sub-process /usr/bin/dpkg returned an error code (1) ProblemType: Package DistroRelease: Ubuntu 15.04 Package: avahi-daemon 0.6.31-4ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5 Uname: Linux 3.19.0-28-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.5 Architecture: amd64 Date: Sat Oct 3 21:12:04 2015 DuplicateSignature: package:avahi-daemon:0.6.31-4ubuntu4:子进程 已安装 pre-removal 脚本 返回错误状态 1 ErrorMessage: 子进程 已安装 pre-removal 脚本 返回错误状态 1 InstallationDate: Installed on 2014-12-18 (288 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) RelatedPackageVersions: dpkg 1.17.25ubuntu1 apt 1.0.9.7ubuntu4.1 SourcePackage: avahi Title: package avahi-daemon 0.6.31-4ubuntu4 failed to install/upgrade: 子进程 已安装 pre-removal 脚本 返回错误状态 1 UpgradeStatus: Upgraded to vivid on 2015-04-29 (157 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1502438/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
