在給系統升級內核版本，執行了apt-get -f install，出現如下報錯：
dpkg: error processing package plymouth-theme-ubuntu-text (--configure):
dependency problems - leaving triggers unprocessed
No apport report written because MaxReports is reached already
dpkg: too many errors, stopping
Errors were encountered while processing:
plymouth-theme-ubuntu-text
plymouth-theme-ubuntu-text
plymouth-theme-ubuntu-text
plymouth-theme-ubuntu-text
……
plymouth-theme-ubuntu-text
plymouth-theme-ubuntu-text
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
解決辦法：
vim /var/lib/dpkg/status
在該文件下面找到Package: plymouth-theme-ubuntu-text開頭的整段內容，大概25行左右。刪除，保存退出（25dd， :wq）
就是報錯的包。
再執行apt-get -f install
報錯：
update-initramfs: Generating /boot/initrd.img-4.4.0-81-generic
Errors were encountered while processing:
grub-efi-amd64
grub-efi-amd64-signed
shim-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)
同樣類型錯誤，找到這三個開頭的字段刪除。
一定要Package: + 報錯包名，開頭的字段。
有些網友說下面方法也可以：
apt install --reinstall grub
apt install --reinstall grub2-common
apt install --reinstall grub-efi-amd64
apt install --reinstall grub-efi-amd64-bin
具體沒試過，下次在遇到這類問題試試。
做完之後，在apt-get -f install 就沒有錯誤了。