How to upgrade Nagios 4.2.2 to Nagios 4.3.2 step by step

Backup current nagios directory

cd /usr/local

tar -zcvf nagios-backup.ar.gz nagios

cd /tmp

wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.2.tar.gz .

tar -zxvf  nagios-4.3.2.tar.gz

cd nagios-4.3.2

./configure --with-command-group=nagcmd

make all

make install

Once the above process is completed run the verification check on the upgrade to make sure there are no errors reported.

# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

 It will give below warning then resolve by executing below command

WARNING: The normal_check_interval attribute is deprecated and will be removed in future versions. Please use check_interval instead.

for resolve excute cd /usr/local/nagios/etc/
sed -i -e 's/normal_check_interval/check_interval/g' *.cfg

WARNING: The normal_retry_interval attribute is deprecated and will be removed in future versions. Please use retry_interval instead.

for resolve excute cd /usr/local/nagios/etc/
sed -i -e 's/retry_check_interval/retry_interval/g' *.cfg

Verify once again vai /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Restart nagios it will show updated version

If face any issue just remove /usr/local/nagios directory and restore tar file backup and restart nagios