ubuntu系统原版本20.04，服务器dell T40.

执行apt update后，再执行apt upgrade。

apt update执行成功，但apt upgrade执行中断，提示如下：

Checking package manager
Reading package lists... Done
Building dependency tree        
Reading state information... Done
Hit http://mirrors.aliyun.com/ubuntu focal InRelease                                                                                  
Hit http://mirrors.aliyun.com/ubuntu focal-updates InRelease                                                                          
Hit http://mirrors.aliyun.com/ubuntu focal-backports InRelease                                                                        
Hit http://mirrors.aliyun.com/ubuntu focal-security InRelease                                                                         
Fetched 0 B in 0s (0 B/s)                                                                                                             
Reading package lists... Done    
Building dependency tree          
Reading state information... Done

You are using pam_tally or pam_tally2 in your configuration. 

The pam_tally and pam_tally2 modules have been removed from PAM. You 
are using one of these modules in your PAM configuration in 
/etc/pam.d. You must remove the uses of these modules before PAM can 
be upgraded; including these modules in your PAM configuration after 
the upgrade will stop users from being able to log into the system. 

Consider the pam_faillock module as a replacement for pam_tally. 

Restoring original system state
 

进入/etc/pam.d目录

使用命令：

grep pam *

将所有pam相关的配置行使用#注释掉。

保存文件，再次执行apt upgrade。

运行成功。