我已经设置了一个自动更新的 cronjob。然而，我意识到我的 cronjob 没有运行。所以，这是我的 cronjob 列表。
# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').
#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h dom mon dow command
10 * * * * root /usr/bin/apt update -q -y >/var/log/apt/automaticupdates.log
20 * * * * root /usr/bin/apt upgrade -q -y >/var/log/apt/automaticupdates.log
25 * * * * root /usr/bin/apt-get full-upgrade -q -y >/var/log/apt/automaticupdates.log
30 * * * * root /usr/bin/apt clean >/var/log/apt/automaticupdates.log
但是，当我运行此命令来启用我的 cronjob 时，它给了我一些我无法正确诊断的错误消息。
sudo systemctl enable cron
Synchronizing state of cron.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable cron
insserv: warning: could not find all dependencies for $dbus
insserv: warning: could not find all dependencies for $dbus
insserv: warning: could not find all dependencies for $dbus
insserv: warning: could not find all dependencies for $dbus
但是，我的系统中安装了 dbus。
sudo apt install dbus
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
dbus is already the newest version (1.12.20-2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
有人能告诉我我遗漏了什么吗？或者有什么错误导致 cronjob 无法工作？任何帮助都将不胜感激。我非常感谢您提供的任何帮助。