@stoeckigt: Hi Nico, appreciate for your help so much. I follow your instruction and the system updated successfully now. Below is the output:
root@files:~# ls -lah /etc/init.d/lvm*
-rwxr-xr-x 1 root root 695 Mar 17 23:03 /etc/init.d/lvm2
-rwxr-xr-x 1 root root 571 Mar 17 23:03 /etc/init.d/lvm2-lvmetad
-rwxr-xr-x 1 root root 586 Mar 17 23:03 /etc/init.d/lvm2-lvmpolld
root@files:~# tar -czvf ~/lvm2_etad-init_script_new.tgz /etc/init.d/lvm* --remove-files
tar: Removing leading `/' from member names
/etc/init.d/lvm2
/etc/init.d/lvm2-lvmpolld
root@files:~# univention-install -f
Hit https://updates.software-univention.de 4.0-1/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.0-2/all/ Release.gpg
Hit https://updates.software-univention.de 4.0-2/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.0-3/all/ Release.gpg
Hit https://updates.software-univention.de 4.0-3/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.0-4/all/ Release.gpg
Hit https://updates.software-univention.de 4.0-4/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.0-5/all/ Release.gpg
Hit https://updates.software-univention.de 4.0-5/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.1-0/all/ Release.gpg
Hit https://updates.software-univention.de 4.1-0/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.1-1/all/ Release.gpg
Hit https://updates.software-univention.de 4.1-1/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.1-2/all/ Release.gpg
Hit https://updates.software-univention.de 4.1-2/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.1-3/all/ Release.gpg
Hit https://updates.software-univention.de 4.1-3/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.1-4/all/ Release.gpg
Hit https://updates.software-univention.de 4.1-4/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.1-4-errata/all/ Release.gpg
Hit https://updates.software-univention.de 4.1-4-errata/amd64/ Release.gpg
Hit https://updates.software-univention.de 4.0-0/all/ Release
Hit https://updates.software-univention.de 4.0-0/amd64/ Release
Hit https://updates.software-univention.de 4.0-1/all/ Release
Hit https://updates.software-univention.de 4.0-1/amd64/ Release
Hit https://updates.software-univention.de 4.0-2/all/ Release
Hit https://updates.software-univention.de 4.0-2/amd64/ Release
Hit https://updates.software-univention.de 4.0-3/all/ Release
Hit https://updates.software-univention.de 4.0-3/amd64/ Release
Hit https://updates.software-univention.de 4.0-4/all/ Release
Hit https://updates.software-univention.de 4.0-4/amd64/ Release
Hit https://updates.software-univention.de 4.0-5/all/ Release
Hit https://updates.software-univention.de 4.0-5/amd64/ Release
Hit https://updates.software-univention.de 4.1-0/all/ Release
Hit https://updates.software-univention.de 4.1-0/amd64/ Release
Hit https://updates.software-univention.de 4.1-1/all/ Release
Hit https://updates.software-univention.de 4.1-1/amd64/ Release
Hit https://updates.software-univention.de 4.1-2/all/ Release
Hit https://updates.software-univention.de 4.1-2/amd64/ Release
Hit https://updates.software-univention.de 4.1-3/all/ Release
Hit https://updates.software-univention.de 4.1-3/amd64/ Release
Hit https://updates.software-univention.de 4.1-4/all/ Release
Hit https://updates.software-univention.de 4.1-4/amd64/ Release
Hit https://updates.software-univention.de 4.1-4-errata/all/ Release
Hit https://updates.software-univention.de 4.1-4-errata/amd64/ Release
Hit https://updates.software-univention.de 4.0-0/all/ Packages
Hit https://updates.software-univention.de 4.0-0/amd64/ Packages
Hit https://updates.software-univention.de 4.0-1/all/ Packages
Hit https://updates.software-univention.de 4.0-1/amd64/ Packages
Hit https://updates.software-univention.de 4.0-2/all/ Packages
Hit https://updates.software-univention.de 4.0-2/amd64/ Packages
Hit https://updates.software-univention.de 4.0-3/all/ Packages
Hit https://updates.software-univention.de 4.0-3/amd64/ Packages
Hit https://updates.software-univention.de 4.0-4/all/ Packages
Hit https://updates.software-univention.de 4.0-4/amd64/ Packages
Hit https://updates.software-univention.de 4.0-5/all/ Packages
Hit https://updates.software-univention.de 4.0-5/amd64/ Packages
Hit https://updates.software-univention.de 4.1-0/all/ Packages
Hit https://updates.software-univention.de 4.1-0/amd64/ Packages
Hit https://updates.software-univention.de 4.1-1/all/ Packages
Hit https://updates.software-univention.de 4.1-1/amd64/ Packages
Hit https://updates.software-univention.de 4.1-2/all/ Packages
Hit https://updates.software-univention.de 4.1-2/amd64/ Packages
Hit https://updates.software-univention.de 4.1-3/all/ Packages
Hit https://updates.software-univention.de 4.1-3/amd64/ Packages
Hit https://updates.software-univention.de 4.1-4/all/ Packages
Hit https://updates.software-univention.de 4.1-4/amd64/ Packages
Hit https://updates.software-univention.de 4.1-4-errata/all/ Packages
Hit https://updates.software-univention.de 4.1-4-errata/amd64/ Packages
Fetched 819 B in 23s (35 B/s)
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 585 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up lvm2 (2.02.168-2+b1) ...
invoke-rc.d: unknown initscript, /etc/init.d/lvm2 not found.
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-4.1.0-ucs227-amd64
root@files:~#
Then I executed command “apt-get autoremove” and “apt-get autoclean” and try to update again via GUI. Finally, it was successful ![:heart_eyes: :heart_eyes:](//help.univention.com/images/emoji/twitter/heart_eyes.png?v=5)