解决安装dkms出现依赖问题

mrc3@wanglab-node3:~$ sudo apt install dkms
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dpkg-dev : Depends: libdpkg-perl (= 1.21.1ubuntu2.1) but 1.21.1ubuntu2.3 is to be installed
            Recommends: build-essential but it is not going to be installed
            Recommends: libalgorithm-merge-perl but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

尝试了很多办法都没有成功，最后狠心尝试手动指定 libdpkg-perl 的版本进行安装。

sudo apt install libdpkg-perl=1.21.1ubuntu2.1

然后重新sudo apt install dkms，成功。

##之所以狠心尝试，是因为手动指定版本可能会导致其他依赖问题，因此这是一个较为极端的方法。