Setting up Nagios XI

nagios core install | nagios core | nagios plugins | nagios ssh

NAGIOS XI NOT RECOMMENDED: THIS IS NOT FOSS

Choose a dedicated host for that, and preferably a system for which packages are ready e.g. CentOS, Ubuntu or Debian. We here proceed with Ubuntu Server 20 LTS (focal). SystemD is required, it won’t work within an init less Docker instance.

Enable multiverse

vi /etc/apt/sources.list
apt update
apt install snmp-mibs-downloader

and proceed

wget https://assets.nagios.com/downloads/nagiosxi/xi-latest.tar.gz
tar xzf xi-latest.tar.gz
cd nagiosxi/
time ./fullinstall

ready to go

https://x.x.x.x/nagiosxi/

nagiosadmin / PASSWORD-YOU-DEFINED

Start from scratch

get rid of all the packages installed by fullinstall and clean-up folders

cd /var/log/
less log/dpkg.log
sed -n '/snmp-mibs-downloader:all/,$p' dpkg.log | grep installed | awk '{print $5}'
sed -n '/snmp-mibs-downloader:all/,$p' dpkg.log | grep installed | awk '{print $5}' | \
    xargs dpkg --purge
rm -rf ...

get rid of nagios

find /usr/local/ | less
rm -rf /usr/local/

just make sure package system is in a good state and eventually re-install a few packages

apt-get -f install
apt reinstall base-files manpages man-db systemd ntp

Resources

Installing Nagios XI Manually on Linux https://assets.nagios.com/downloads/nagiosxi/docs/Installing-Nagios-XI-Manually-on-Linux.pdf