如何使用 Bash 检测 apt-get 是否需要重新启动？
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How to detect whether apt-get requires a reboot using Bash?
提问by Roger
I am writing a bash script (for apt-get based OS's) that automates the installations process of various programs. In this process I run "apt-get -fy update" and "apt-get -fy upgrade" sometimes. In the process of upgrading, occasionally, a restart is required.
我正在编写一个 bash 脚本（用于基于 apt-get 的操作系统），它可以自动执行各种程序的安装过程。在这个过程中，我有时会运行“apt-get -fy update”和“apt-get -fy upgrade”。在升级过程中，偶尔需要重启。
My question: is there a way of testing if the system is asking for a restart after running "apt-get -fy upgrade"? I am trying to write the script for it to run from beginning to end without human any intervention.
我的问题：有没有办法测试系统在运行“apt-get -fy upgrade”后是否要求重新启动？我正在尝试编写脚本，让它在没有人为干预的情况下从头到尾运行。
Thank you.
谢谢你。
回答by Gcmalloc
Use the file /var/run/reboot-required which does exactly what you want. So we will have this:
使用文件 /var/run/reboot-required 完全符合您的要求。所以我们会有这个：
apt-get update && apt-get -fy upgrade && [ -f /var/run/reboot-required ] && shutdown -r now
回答by jw013
I don't recall whether apt-getactually gives you a predictably formatted message informing you whether a restart is necessary, but if it does you could just check the output, e.g. something like apt-get -fy update | grep -q 'fill in restart message pattern' && reboot.
我不记得是否apt-get真的给你一条可预测的格式化消息，通知你是否需要重启，但如果是这样，你可以检查输出，例如像apt-get -fy update | grep -q 'fill in restart message pattern' && reboot.
Another probably less reliable alternative is to use checkrestartfrom the debian-goodiespackage.
另一个可能不太可靠的替代方法是checkrestart从debian-goodies包中使用。
回答by Hassek
If you do a
如果你做一个
apt-get -fy update && shutdown -r now
it will respect the order and will update until finish and finally restart your server.
它将遵守顺序并更新直到完成并最终重新启动您的服务器。
