nagios install

 useradd nagios
 wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.2.tar.gz
 wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz
 tar xfv nagios-4.0.2.tar.gz
 tar xvf nagios-plugins-1.5.tar.gz
 cd nagios-4.0.2
 ./configure --prefix=/usr/local/nagios
 make ; make all ; make install
 make install-init
 make install-config
 cd ../nagios-plugins-1.5
 ./configure --prefix=/usr/local/nagios && make all && make install

-- for nagios map --

yum install gd gd-devel

make clean
 ./configure --prefix=/usr/local/nagios --with-gd-lib=/usr/lib   --with-gd-inc=/usr/include
 ./configure --with-command-group=nagcmd
 make all; make install; make install-init; make install-config; make install-commandmode; make install-webconf 

-- for mail command --

yum install mailx


-- for perl --
yum -y install perl-Params-Validate perl-Math-Calc-Units perl-Regexp-Commonperl-Class-Accessor perl-Config-Tiny perl-Nagios-Plugin.noarch