installation error

[ashishChirag]

Nagios XI Installation Log
==========================
DATE: Sat Aug 4 09:55:50 IST 2018

DISTRO INFO:
Ubuntu
16.04
x86_64

THIS IS A NEW INSTALL!

INSTALLING:
full=5.5.1
major=5
minor=5.1
releasedate=2018-07-12
release=5501

Repos already configured - exiting.
Installing prerequisites...
Checking conflicting packages
dpkg-query: package 'nagios' is not installed and no information is available

dpkg-query: package 'nagios-nrpe' is not installed and no information is available

dpkg-query: package 'nagios-nsca' is not installed and no information is available

dpkg-query: package 'ndoutils' is not installed and no information is available

dpkg-query: package 'ndoutils-mysql' is not installed and no information is available

dpkg-query: package 'nrpe' is not installed and no information is available

dpkg-query: package 'nsca' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
Ign:1 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 InRelease
Ign:2 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 InRelease
.
.
.
.
Get:51 http://in.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [333 kB]
Get:52 http://security.ubuntu.com/ubuntu xenial-security/multiverse i386 Packages [3,628 B]
Get:53 http://in.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [16.4 kB]
Get:54 http://in.archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 Packages [15.5 kB]
Get:55 http://in.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 DEP-11 Metadata [5,964 B]
Get:56 http://in.archive.ubuntu.com/ubuntu xenial-updates/multiverse DEP-11 64x64 Icons [14.3 kB]
Get:57 http://in.archive.ubuntu.com/ubuntu xenial-backports/main amd64 DEP-11 Metadata [3,324 B]
Get:58 http://in.archive.ubuntu.com/ubuntu xenial-backports/universe amd64 DEP-11 Metadata [5,100 B]
AppStream cache update completed, but some metadata was ignored due to errors.
Fetched 7,599 kB in 11s (639 kB/s)
Reading package lists...
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.

[cdienger]

We're looking into it, but Ubuntu is not a supported platform at this time:

https://assets.nagios.com/downloads/nag ... -Linux.pdf

[lmiltchev]

In addition to what cdienger said...

Have you tried running 'sudo dpkg --configure -a' to correct the problem as suggested?

Can you run 'apt-get update' successfully on this system?

There is a bug with Ubuntu 16.04 that could be affecting you:
https://bugs.launchpad.net/ubuntu/+sour ... ug/1644498

Hope this helps.