Install Nagios-NRPE Client in debian/ubuntu

March 10, 2019

Follow Step by Step to Install Nrpe client in Remote servers you want to monitor from Nagios core

  1. Update Repository and install GCC

    apt-get update && apt-get upgrade -y
apt-get install build-essential -y
gcc -v
make -v

  2. Create user which will run NRPE scripts in remote servers

    useradd nagios
passwd nagios

  3. Nagios plugin download and install

    cd /tmp
#wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz
wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz
tar -xzvf nagios-plugins-*.tar.gz
rm nagios-plugins-*.tar.gz
cd nagios-plugins-*
apt-get install libssl-dev -y
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
chown nagios:nagios /usr/local/nagios
chown -R nagios:nagios /usr/local/nagios/libexec
apt-get install xinetd -y

  4. NRPE daemon download and install

    cd /tmp
#wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-3.2.1/nrpe-3.2.1.tar.gz
wget https://github.com/amitanvir/nagios-plugin-and-nrpe-installer/raw/master/nrpe-2.12.tar.gz
tar -xzvf nrpe-*.tar.gz
rm nrpe-*.tar.gz
cd nrpe-*
ln -s /usr/lib/x86_64-linux-gnu/libssl.so /usr/lib/libssl.so
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config
make install-xinetd

  5. Configure NRPE

    Edit Xinetd NRPE entry for adding Nagios Monitoring server to the “only_from” directive

    nano /etc/xinetd.d/nrpe

    only_from = 127.0.0.1 {nagios server ip}

    Edit services file for adding entry for nrpe daemon

    nano /etc/services

    nrpe 5666/tcp # NRPE

    Restart the NRPE service

    /etc/init.d/xinetd restart

    Test if NRPE is listening

    netstat -at | grep nrpe

    The output out this command should show something like this
    tcp 0 0 *:nrpe *:* LISTEN

    Next, check to make sure the NRPE daemon is functioning properly. To do this, run the check_nrpe plugin that was installed for testing purposes.

    /usr/local/nagios/libexec/check_nrpe -H localhost

    If everything is fine you will see this output:
    NRPE v2.12

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