从 16 LTS 升级后,Ubuntu 18 启动时间非常长

从 16 LTS 升级后,Ubuntu 18 启动时间非常长

从 16 LTS 升级后,我在 ubuntu 18 中遇到了启动时间问题。以下是systemd-analyze blame

 1min 9.470s plymouth-start.service
 1min 8.107s plymouth-read-write.service
     48.640s plymouth-quit-wait.service
     45.970s apt-daily.service
     16.562s dev-sda8.device
     13.815s systemd-journal-flush.service
     13.615s keyboard-setup.service
     13.369s systemd-tmpfiles-setup-dev.service
     12.658s systemd-sysctl.service
      9.577s NetworkManager-wait-online.service
      4.732s mysql.service
      3.813s NetworkManager.service
      3.429s udisks2.service
      3.242s networkd-dispatcher.service
      2.815s apparmor.service
      2.640s snapd.service
      2.493s ModemManager.service
      2.329s accounts-daemon.service
      2.125s grub-common.service
      1.966s systemd-random-seed.service
      1.734s dev-loop8.device
      1.656s gpu-manager.service
      1.524s thermald.service
      1.489s dev-loop9.device
      1.443s dev-loop10.device
      1.323s dev-loop2.device
      1.323s dev-loop1.device
      1.322s dev-loop0.device
      1.319s dev-loop4.device
      1.314s dev-loop5.device
      1.313s dev-loop7.device
      1.312s dev-loop6.device
      1.305s dev-loop3.device
      1.037s systemd-remount-fs.service
      1.032s fwupd.service
       982ms sys-kernel-debug.mount

有人知道如何减少它吗?或者如果我的系统有问题,如何修复?

谢谢。

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