Comments on: How to Install Icinga2 Monitoring Tool on Ubuntu 20.04/22.04

By: geek

geek — Sun, 09 Feb 2025 07:02:57 +0000

This guide was a lifesaver! I was stuck trying to figure out how to manage my Ubuntu server after struggling with configuration issues for hours. The instructions here made everything so simple and smooth.

By: geek

geek — Sat, 08 Feb 2025 05:03:36 +0000

Wow, this was such a helpful read! I was setting up a Flask environment on Ubuntu and came across a similar issue while figuring out how to configure things properly. Luckily, I found this great guide to install Flask on Ubuntu, and everything finally clicked.

I appreciate the clean breakdown of PHP in this article – especially the example showing how it embeds directly into HTML.

Really loved the humble tone too. Thanks for sharing this!

By: Daniel Craig

Daniel Craig — Fri, 12 Jan 2024 18:40:13 +0000

@Neil Pittaway mentioned PHP 8.1 with Ubuntu 22.04 doesn’t work, so this command will not work.

sudo nano /etc/php/8.1/apache2/php.ini   [On Ubuntu 22.04]

You may need to edit and mention to use older PHP version with latest Ubuntu.

After generating token, error occurs on /icingaweb2/setup on page Requirements

Deprecated: Return type of Icinga\Application\Libraries::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/php/Icinga/Application/Libraries.php on line 20

known bug : https://github.com/Icinga/icingaweb2/issues/4837

Also we get a warning that apt-key is going to be deprecated so as a workaround used this.

https://www.digitalocean.com/community/tutorials/how-to-handle-apt-key-and-add-apt-repository-deprecation-using-gpg-to-add-external-repositories-on-ubuntu-22-04

curl -L https://packages.icinga.com/icinga.key | sudo gpg --dearmor -o /usr/share/keyrings/icinga2
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1723  100  1723    0     0   9429      0 --:--:-- --:--:-- --:--:--  9467

By: Ravi Saive

Ravi Saive — Wed, 13 Dec 2023 03:06:48 +0000

In reply to VISHAVJEET Rohilla. @Vishavjeet, To fix this issue, make sure that the LDAP module and other required modules are installed on your system. You can use your package manager to verify their status.

dpkg -l | grep slapd    # For Debian/Ubuntu
rpm -qa | grep openldap # For Red Hat/CentOS

By: VISHAVJEET Rohilla

VISHAVJEET Rohilla — Tue, 12 Dec 2023 07:32:34 +0000

Hello, the LDAP module and some other modules are missing.

What should I do? Please help.