I have Xubuntu 21.04 64-bit. Every time I do "apt upgrade" I have error messages:
Setting up avahi-daemon (0.8-5ubuntu3.1) ... invoke-rc.d: syntax error: unknown option "--skip-systemd-native" dpkg: error processing package avahi-daemon (--configure): installed avahi-daemon package post-installation script subprocess returned error exit status 1 dpkg: dependency problems prevent configuration of avahi-utils: avahi-utils depends on avahi-daemon (= 0.8-5ubuntu3.1); however: Package avahi-daemon is not configured yet. dpkg: error processing package avahi-utils (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: avahi-daemon avahi-utils E: Sub-process /usr/bin/dpkg returned an error code (1) Could you help me? Thanks.
I've tried this command to get more info:
sudo apt-get update; sudo apt-get install -f; sudo dpkg --configure -a Hit:1 stable InRelease Hit:2 stable InRelease Hit:3 stable InRelease Hit:4 stable InRelease Hit:5 hirsute InRelease Hit:6 hirsute-updates InRelease Hit:7 hirsute-backports InRelease Hit:8 stable InRelease Get:9 hirsute-security InRelease [110 kB] Hit:10 hirsute InRelease Ign:12 disco InRelease Hit:13 disco Release Hit:14 apt/stable/ InRelease Hit:11 llvm-toolchain-groovy-13 InRelease Fetched 110 kB in 2s (58,5 kB/s) Reading package lists... Done Reading package lists... Done Building dependency tree... Done Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 2 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up avahi-daemon (0.8-5ubuntu3.1) ... invoke-rc.d: syntax error: unknown option "--skip-systemd-native" dpkg: error processing package avahi-daemon (--configure): installed avahi-daemon package post-installation script subprocess returned error exit status 1 dpkg: dependency problems prevent configuration of avahi-utils: avahi-utils depends on avahi-daemon (= 0.8-5ubuntu3.1); however: Package avahi-daemon is not configured yet. dpkg: error processing package avahi-utils (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: avahi-daemon avahi-utils E: Sub-process /usr/bin/dpkg returned an error code (1) Setting up avahi-daemon (0.8-5ubuntu3.1) ... invoke-rc.d: syntax error: unknown option "--skip-systemd-native" dpkg: error processing package avahi-daemon (--configure): installed avahi-daemon package post-installation script subprocess returned error exit status 1 dpkg: dependency problems prevent configuration of avahi-utils: avahi-utils depends on avahi-daemon (= 0.8-5ubuntu3.1); however: Package avahi-daemon is not configured yet. dpkg: error processing package avahi-utils (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: avahi-daemon avahi-utils which invoke-rc.d, dpkg -S $(which invoke-rc.d), apt-cache policy $(dpkg -S $(which invoke-rc.d) | awk -F: '{print $1}') /usr/bin/dpkg /usr/bin/apt-cache 1 Answer
You need to remove obsolete sysv-rc package and reinstall the corresponding package with invoke-rc.d inside it by
sudo dpkg -P --force-all sysv-rc sudo apt-get install --reinstall init-system-helpers and then retry running
sudo apt-get update sudo apt-get install -f sudo dpkg --configure -a 
