這是當我嘗試透過通常不執行 X 的 ssh 終端會話升級遠端電腦時發生的情況：
$ sudo apt upgrade
Reading package lists...
Building dependency tree...
Reading state information...
Calculating upgrade...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
4 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Setting up keyboard-configuration (1.108ubuntu15.5) ...
Couldn't interpret _XKB_RULES_NAMES property
Use defaults: rules - 'base' model - 'pc105' layout - 'us'
Error loading new keyboard description
bin/setupcon: 803: bin/setupcon: bin/../bin/ckbcomp: not found
dpkg: error processing package keyboard-configuration (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of console-setup:
console-setup depends on keyboard-configuration (= 1.108ubuntu15.5); however:
Package keyboard-configuration is not configured yet.
dpkg: error processing package console-setup (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of kbd:
kbd depends on console-setup | console-setup-mini; however:
Package console-setup is not configured yet.
Package console-setup-mini is not installed.
dpkg: error processing package kbd (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of console-setup-linux:
console-setup-linux depends on kbd (>= 1.15-1ubuntu3); however:
Package kbd is not configured yet.
console-setup-linux depends on keyboard-configuration (= 1.108ubuntu15.5); however:
Package keyboard-configuration is not configured yet.
dpkg: error processing package console-setup-linux (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
keyboard-configuration
console-setup
kbd
嗯，我想知道這個消息是從哪裡來Couldn't interpret _XKB_RULES_NAMES property的，它很重要嗎？
也許/etc/default/keyboard是問題所在？
$ cat /etc/default/keyboard
# KEYBOARD CONFIGURATION FILE
# Consult the keyboard(5) manual page.
XKBMODEL="pc105"
XKBLAYOUT="us"
XKBVARIANT=""
XKBOPTIONS=""
BACKSPACE="guess"
看起來不錯。問題又來了：
$ setxkbmap en
Couldn't interpret _XKB_RULES_NAMES property
Use defaults: rules - 'base' model - 'pc105' layout - 'us'
Error loading new keyboard description
建議？
答案1
這是我解決問題的方法。不知何故卸載清除perl了僵局：
sudo apt remove perl keyboard-configuration console-setup-linux console-setup kbd
sudo apt autoremove
sudo apt autoclean
sudo apt install perl
sudo apt install -f
sudo apt upgrade
sudo apt upgrade -f
sudo apt autoremove
sudo apt autoclean