I've try and install nagios on a freshly updated Ubuntu 21.04 and the same error appeared:
nagios4.service - nagios4 Loaded: loaded (/lib/systemd/system/nagios4.service; disabled; vendor preset: enabled) Active: failed (Result: timeout) since Mon 2021-04-19 11:45:13 UTC; 10ms ago Docs: man:nagios4 Process: 12026 ExecStartPre=bash -c nagiospipe=$$(sed -n "s/^command_file=\(.*\)/\1/p" ${NAGIOSCFG}) ; [ -z "$${nagiospipe}" -o ! -e "$${nagiospipe}" ] || rm -f "$${nagiospipe}" (code=exited, status=0/SUCCESS) Process: 12028 ExecStart=/usr/sbin/nagios4 ${NAGIOSCFG} (code=exited, status=0/SUCCESS) Process: 12029 ExecStartPost=bash -c nagiospipe=$$(sed -n "s/^command_file=\(.*\)/\1/p" ${NAGIOSCFG}) ; [ -z "$${nagiospipe}" -o ! -e "$${nagiospipe}" ] || rm -f "$${nagiospipe}" (code=exited, status=0/SUCCESS) Main PID: 12028 (code=exited, status=0/SUCCESS) Apr 19 11:43:44 ip-172-31-20-40 nagios4[12028]: Successfully launched command file worker with pid 12035 Apr 19 11:45:13 ip-172-31-20-40 systemd[1]: nagios4.service: start-post operation timed out. Terminating. Apr 19 11:45:13 ip-172-31-20-40 nagios4[12028]: Caught SIGTERM, shutting down... Apr 19 11:45:13 ip-172-31-20-40 nagios4[12028]: Caught SIGTERM, shutting down... Apr 19 11:45:13 ip-172-31-20-40 nagios4[12028]: Successfully shutdown... (PID=12028) Apr 19 11:45:13 ip-172-31-20-40 nagios4[12028]: Successfully shutdown... (PID=12028) Apr 19 11:45:13 ip-172-31-20-40 systemd[1]: nagios4.service: Killing process 12035 (nagios4) with signal SIGKILL. Apr 19 11:45:13 ip-172-31-20-40 systemd[1]: nagios4.service: Failed with result 'timeout'. Apr 19 11:45:13 ip-172-31-20-40 systemd[1]: nagios4.service: Unit process 12035 (nagios4) remains running after unit stopped. Apr 19 11:45:13 ip-172-31-20-40 systemd[1]: Failed to start nagios4. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924996 Title: package nagios4-common 4.4.6-2 failed to install/upgrade: installed nagios4-common package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nagios4/+bug/1924996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs