尝试删除旧内核以便为更新腾出空间（当前运行 16.04.03 服务器）：
sudo apt autoremove
给出这个：
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run â??apt-get -f installâ?? to correct these.
The following packages have unmet dependencies.
linux-headers-generic : Depends: linux-headers-4.4.0-141-generic but it is not
installed
E: Unmet dependencies. Try using -f.
因此，我运行：
sudo apt -f autoremove
这样做会带来以下好处：
The following additional packages will be installed:
Reading package lists...
Building dependency tree...
Reading state information...
Correcting dependencies... Done
The following additional packages will be installed:
linux-headers-4.4.0-141 linux-headers-4.4.0-141-generic
The following packages will be REMOVED
linux-headers-4.4.0-109 linux-headers-4.4.0-112 linux-headers-4.4.0-116
linux-headers-4.4.0-119 linux-headers-4.4.0-127 linux-headers-4.4.0-128
linux-headers-4.4.0-130 linux-headers-4.4.0-130-generic
linux-headers-4.4.0-131 linux-headers-4.4.0-131-generic
linux-headers-4.4.0-133 linux-headers-4.4.0-133-generic
linux-headers-4.4.0-134 linux-headers-4.4.0-134-generic
linux-headers-4.4.0-87 linux-image-4.4.0-130-generic
linux-image-4.4.0-131-generic linux-image-4.4.0-133-generic
linux-image-4.4.0-134-generic linux-image-extra-4.4.0-130-generic
linux-image-extra-4.4.0-131-generic linux-image-extra-4.4.0-133-generic
linux-image-extra-4.4.0-134-generic
The following NEW packages will be installed
linux-headers-4.4.0-141 linux-headers-4.4.0-141-generic
0 to upgrade, 2 to newly install, 23 to remove and 1 not to upgrade.
2 not fully installed or removed.
Need to get 0 B/10.8 MB of archives.
After this operation, 1,387 MB disk space will be freed.
Do you want to continue? [Y/n]
E: Waited for /usr/sbin/dpkg-preconfigure --apt || true but it wasn't there
E: Failure running script /usr/sbin/dpkg-preconfigure --apt || true
/etc/apt/apt.conf.d/70debconf 看起来像这样：
// Pre-configure all packages with debconf before they are installed.
// If you don't like it, comment it out.
DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt || true";};
我可以跑
/usr/sbin/dpkg-preconfigure --help
应该有足够的可用空间，还是不够？
df -h /boot
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 472M 106M 342M 24% /boot
我按照 George Udosen 的建议尝试过：
sudo dpkg --configure -a
但这带来了：
dpkg: dependency problems prevent configuration of linux-headers-generic:
linux-headers-generic depends on linux-headers-4.4.0-141-generic; however:
Package linux-headers-4.4.0-141-generic is not installed.
dpkg: error processing package linux-headers-generic (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of linux-generic:
linux-generic depends on linux-headers-generic (= 4.4.0.141.147); however:
Package linux-headers-generic is not configured yet.
dpkg: error processing package linux-generic (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
linux-headers-generic
linux-generic
只是为了好玩，我尝试了下一个建议的命令：
sudo apt update
这带来了 - 在点击之后：
Reading package lists... Done
E: Couldn't wait for subprocess - waitpid (10: No child processes)
实际上，当尝试从其他线程解决时，我多次看到“没有子进程”。
更新：问题解决了。实际上，可能还有几个问题。注意：我通过 Webmin 运行服务器。一些帖子暗示这是 Webmin 的问题，所以在我在这里发帖之前，我尝试直接在服务器上修复该问题，但没能成功。但现在……
我在另一个线程中找到了如何删除产生问题的 Linux 软件包：
sudo dpkg -P linux-generic
sudo dpkg -P linux-image-generic
sudo dpkg -P linux-headers-generic
这可能与 George Udosen（非常感谢！）的建议相结合，消除了依赖性错误，并使得安装最新版本的 Webmin 成为可能。
E: Waited for /usr/sbin/dpkg-preconfigure --apt || true but it wasn't there
E: Failure running script /usr/sbin/dpkg-preconfigure --apt || true
结果是 Webmin 问题，当直接从服务器运行自动删除时，问题就消失了。
非常感谢您的帮助！服务器将再次在我空置的公寓里无人看管一段时间，因此解决这个问题很重要。我今晚又可以睡个好觉了。