为什么只下载apt-getcronjob-whydownloadonlyforapt-getcronjob

6  

You're operating on a faulty assumption--neither apt-get (nor aptitude) are meant to be run automatically, nor is the Debian packaging system really designed for it. That's why the tools make it difficult.

你正在做一个错误的假设 - apt-get(也不是aptitude)都不是自动运行的,Debian打包系统也不是真正为它设计的。这就是工具难以实现的原因。

What happens when a software upgrade breaks because you forgot to update a configuration file? This has happened to me in the past (apache2), and some with severe consequences that prevented the machine from booting (mdadm). What happens when the software brings in dependencies you don't want (i.e. bringing in the entire X11 windowing system, on a server)? Etc, etc...

当您忘记更新配置文件而导致软件升级中断时会发生什么?这在过去曾经发生在我身上(apache2),还有一些会导致严重后果阻止机器启动(mdadm)。当软件引入您不想要的依赖项时(即在服务器上引入整个X11窗口系统)会发生什么?等等......

If you're worried about installing security upgrades automatically, you want to look at the unattended-upgrades package. It will download and install packages from the security archive for you.

如果您担心自动安装安全升级,则需要查看无人值守升级包。它将从安全档案中下载并安装软件包。

1  

I run a Ubuntu server and have the following run as root once a week.

我运行一个Ubuntu服务器,每周一次以root身份运行。

/usr/bin/apt-get update && /usr/bin/apt-get -s -u upgrade

The '-s' option tells apt-get to "simulate" updating the packages but not to actually do anything.
The net effect is I get an email (via cron) telling me what new packages are available.

'-s'选项告诉apt-get“模拟”更新包但不实际做任何事情。净效应是我收到一封电子邮件(通过cron),告诉我有哪些新包可用。

I can then log in and run it by hand, taking the necessary precautions (backups etc) beforehand.

然后我可以手动登录并运行它,事先采取必要的预防措施(备份等)。

Hope this helps.

希望这可以帮助。