Steps to configure Nagios 4 on Ubuntu 14.04 LTS

Steps to configure Nagios 4 on Ubuntu 14.04 LTS

1. Go to Ubuntu Home > Type Terminal in the search box > Open Terminal.

2. After opening the Terminal type the following commands below:-

$ sudo apt-get update

$ sudo apt-get upgrade

$ sudo apt-get install \

> wget \

> build-essential \

> apache2 \

> apache2-utils \

> php5-gd \

> libgd2-xpm-dev \

> libapache2-mod-php5 \

> postfix

$ sudo useradd --system --home /usr/local/nagios -M nagios

$ sudo groupadd --system nagcmd

$ sudo usermod -a -G nagcmd nagios

$ sudo usermod -a -G nagcmd www-data

$ cd /tmp

$ wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.6.tar.gz

$ wget http://nagios-plugins.org/download/nagios-plugins-2.0.tar.gz

$ tar -xzvf nagios-4.0.6.tar.gz

$ tar -xzvf nagios-plugins-2.0.tar.gz

$ cd nagios-4.0.6/

$ sudo ./configure \

> --with-nagios-group=nagios \

> --with-command-group=nagcmd \

> --with-mail=/usr/sbin/sendmail \

> --with-httpd_conf=/etc/apache2/conf-available

General Options:

 -------------------------

        Nagios executable:  nagios

        Nagios user/group:  nagios,nagios

       Command user/group:  nagios,nagcmd

             Event Broker:  yes

        Install ${prefix}:  /usr/local/nagios

    Install ${includedir}:  /usr/local/nagios/include/nagios

                Lock file:  ${prefix}/var/nagios.lock

   Check result directory:  ${prefix}/var/spool/checkresults

           Init directory:  /etc/init.d

  Apache conf.d directory:  /etc/apache2/conf-available

             Mail program:  /usr/sbin/sendmail

                  Host OS:  linux-gnu

          IOBroker Method:  epoll

 Web Interface Options:

 ------------------------

                 HTML URL:  http://localhost/nagios/

                  CGI URL:  http://localhost/nagios/cgi-bin/

 Traceroute (used by WAP):

Review the options above for accuracy

$ sudo make all

$ sudo make install

$ sudo make install-init

$ sudo make install-config

$ sudo make install-commandmode

$ sudo make install-webconf

$ sudo cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/

$ sudo chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers

$ sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

$ sudo ln -s /etc/init.d/nagios /etc/rcS.d/S99nagios

$ cd ..

$ cd nagios-plugins-2.0/

$ sudo ./configure \

> --with-nagios-user=nagios \

> --with-nagios-group=nagios \

> --enable-perl-modules \

> --enable-extra-opts

$ sudo make

$ sudo make install

$ sudo a2enmod cgi

$ sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

$ sudo vi /etc/apache2/sites-enabled/000-default.conf

After entering the VIM Editor the editing instructions are below:

press a Append text following current cursor position

press A Append text to the end of current line

press i Insert text before the current cursor position

press I Insert text at the beginning of the cursor line

press o Open up a new line following the current line and add text there

press O Open up a new line in front of the current line and add text there

press :wq to save & quit

press :q! to quit with out saving

Include conf-available/nagios.conf

Insert the above line into VIM Editor and quit with saving.

$ sudo service apache2 restart

$ sudo service nagios start