报错内容：

errors were encountered while processing usrmerge

ProblemType: Package
DistroRelease: Ubuntu 22.04
Package: usrmerge 25ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-136.153-generic 5.4.218
Uname: Linux 5.4.0-136-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Tue Jan 10 11:38:22 2023
ErrorMessage: installed usrmerge package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2019-09-20 (1207 days ago)
InstallationMedia: Ubuntu-Server 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
Python3Details: /usr/bin/python3.10, Python 3.10.6, python3-minimal, 3.10.6-1~22.04
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
 dpkg 1.21.1ubuntu2.1
 apt 2.4.8
SourcePackage: usrmerge
Title: package usrmerge 25ubuntu2 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to jammy on 2023-01-10 (0 days ago)

解决方法：

直接删除 /lib64。

# rm /lib64

它link到了/usr/lib/x86_64-linux-gnu，删掉不影响什么。更新几步之后，/lib64会重新出现，但link到/usr/lib64。