杯子不会开始

Question

我有 Ubuntu 16.04，它一直是完美的。

从第一天起它就一直在完美打印，但前几天我遇到了一个错误，我愚蠢地没有写下来，我没有去看/var/log/syslog。

错误是关于cups 目录丢失了。在这一点上，我还没有搞乱任何配置，它只是自己破坏了一切。

我想不是我手动创建丢失的东西，而是通过删除并重新安装软件来修复它。

我删除并重新安装了 HP 的打印软件“hplip”和“cups”。这似乎完全破坏了杯子。它不再开始。

以下是start 命令之前和之后的systemctl status输出cups：

$ systemctl status cups
  cups.service - CUPS Scheduler
   Loaded: loaded (/lib/systemd/system/cups.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sun 2016-11-06 10:06:50 GMT; 55min ago
     Docs: man:cupsd(8)
  Process: 1029 ExecStart=/usr/sbin/cupsd -l (code=exited, status=1/FAILURE)
 Main PID: 1029 (code=exited, status=1/FAILURE)

Nov 06 10:06:50 vw-desk2 systemd[1]: Started CUPS Scheduler.
Nov 06 10:06:50 vw-desk2 systemd[1]: cups.service: Main process exited, code=exited, status=1/FAILURE
Nov 06 10:06:50 vw-desk2 systemd[1]: cups.service: Unit entered failed state.
Nov 06 10:06:50 vw-desk2 systemd[1]: cups.service: Failed with result 'exit-code'.
Nov 06 10:06:50 vw-desk2 systemd[1]: cups.service: Start request repeated too quickly.
Nov 06 10:06:50 vw-desk2 systemd[1]: Failed to start CUPS Scheduler.
Nov 06 10:06:52 vw-desk2 systemd[1]: cups.service: Start request repeated too quickly.
Nov 06 10:06:52 vw-desk2 systemd[1]: Failed to start CUPS Scheduler.
vince@vw-desk2:~$ 
vince@vw-desk2:~$ systemctl start cups
vince@vw-desk2:~$ 
vince@vw-desk2:~$ systemctl status cups
  cups.service - CUPS Scheduler
   Loaded: loaded (/lib/systemd/system/cups.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sun 2016-11-06 11:03:42 GMT; 24s ago
     Docs: man:cupsd(8)
  Process: 3664 ExecStart=/usr/sbin/cupsd -l (code=exited, status=1/FAILURE)
 Main PID: 3664 (code=exited, status=1/FAILURE)

Nov 06 11:03:42 vw-desk2 systemd[1]: Started CUPS Scheduler.
Nov 06 11:03:42 vw-desk2 systemd[1]: cups.service: Main process exited, code=exited, status=1/FAILURE
Nov 06 11:03:42 vw-desk2 systemd[1]: cups.service: Unit entered failed state.
Nov 06 11:03:42 vw-desk2 systemd[1]: cups.service: Failed with result 'exit-code'.

/var/log/syslog 没有说任何让我跳出来的东西：

Nov  6 10:11:54 vw-desk2 anacron[786]: Job `cron.daily' terminated
Nov  6 10:11:54 vw-desk2 anacron[786]: Normal exit (1 job run)
Nov  6 10:17:01 vw-desk2 CRON[3371]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Nov  6 10:19:11 vw-desk2 AptDaemon: INFO: Quitting due to inactivity
Nov  6 10:19:11 vw-desk2 AptDaemon: INFO: Quitting was requested
Nov  6 10:19:11 vw-desk2 org.debian.apt[843]: 10:19:11 AptDaemon [INFO]: Quitting due to inactivity
Nov  6 10:19:11 vw-desk2 org.debian.apt[843]: 10:19:11 AptDaemon [INFO]: Quitting was requested
Nov  6 10:21:52 vw-desk2 systemd[1]: Starting Cleanup of Temporary Directories...
Nov  6 10:21:52 vw-desk2 systemd-tmpfiles[3435]: [/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring.
Nov  6 10:21:52 vw-desk2 systemd[1]: Started Cleanup of Temporary Directories.
Nov  6 10:28:01 vw-desk2 CRON[3481]: (root) CMD (   test -x /etc/cron.daily/popularity-contest && /etc/cron.daily/popularity-contest --crond)
Nov  6 10:30:29 vw-desk2 systemd-timesyncd[409]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).
Nov  6 10:30:29 vw-desk2 systemd-timesyncd[409]: Synchronized to time server 91.189.89.198:123 (ntp.ubuntu.com).
Nov  6 11:03:37 vw-desk2 gnome-session[2312]: Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Nov  6 11:03:42 vw-desk2 systemd[1]: Started CUPS Scheduler.
Nov  6 11:03:42 vw-desk2 systemd[1]: cups.service: Main process exited, code=exited, status=1/FAILURE
Nov  6 11:03:42 vw-desk2 systemd[1]: cups.service: Unit entered failed state.
Nov  6 11:03:42 vw-desk2 systemd[1]: cups.service: Failed with result 'exit-code'.
Nov  6 11:03:42 vw-desk2 kernel: [ 3413.846764] audit_printk_skb: 84 callbacks suppressed
Nov  6 11:03:42 vw-desk2 kernel: [ 3413.846767] audit: type=1400 audit(1478430222.644:39): apparmor="DENIED" operation="sendmsg" profile="/usr/sbin/cupsd" name="/run/systemd/journal/socket" pid=3664 comm="cupsd" requested_mask="w" denied_mask="w" fsuid=0 ouid=0

再想一想，最后一行看起来一定是相关的。

我怎样才能重新开始打印？

Answer 1

这也发生在我身上。始终如一地工作而不是重新启动。我在 syslog 中发现了几条 apparmor-denied 消息，但没有任何成效。

然后我注意到/etc/cups/cupsd.conf已经失踪了。那就是问题所在。

您可以打包安装，cups-daemon但它确实提供了一个默认级别的配置文件，您可以将其复制到.

sudo cp /usr/share/cups/cupsd.conf.default /etc/cups/cupsd.conf
sudo service cups restart

Answer 2

systemd 似乎没有提供很多额外的信息。

我不是 cups 专家，但一般方法是尝试通过完全卸载 cups 软件包，然后重新安装并添加打印机来构建具有一定完整性的系统