====== NAGIOS ======
===== Strana serveru Nagios =====
Installace Nagiosu:
  apt-get install nagios

Operace s procesem:
    /etc/init.d/nagios3(nrpe/nagios/...) restart(reload/start/stop)
OR
  service nagios3(nagios-nrpe-server/...) restart(reload/start/stop)

==== Konfigurace ====
Konfiguracni soubour Nagiosu (obecny):
  /etc/nagios3/nagios.cfg

Definice hostu, servicu, hostgroup apod se obvykle provadi v direktorii:
  /etc/nagios3/conf.d

Konfiguracni soubory pluginu:
  /etc/nagios-plugins/config

Pluginy:
  /usr/lib/nagios/plugins

Priklady definic:

**HOST**
<code>define host{
        use                     generic-host
        host_name               master
        alias                   master
        address                 master.starlab.cz
        hostgroups              debian-servers,http-servers,ssh-servers,ping-servers,disk-servers,raid-servers,load-servers,smart-servers       
        }</code>

**SERVICE**
<code>define service{
        hostgroup_name                  load-servers
        use                             generic-service
        service_description             check_load
        check_command                   check_nrpe_1arg!check_load
        }</code>

**HOSTGROUP**
<code>define hostgroup {
        hostgroup_name  load-servers
                alias           CHECK_LOAD servers                 }
        }</code>

Verifikace konfiguracnich souboru:
  nagios3 -v /etc/nagios3/nagios.cfg

Priklady manualniho distacniho spusteni pluginu na danem serveru:

**S NRPE**
  /usr/lib/nagios/plugins/check_nrpe -H 10.0.4.31 -c check_disk
**BEZ NRPE**
  /usr/lib/nagios/plugins/check_ping -H master.starlab.cz -w 100,10% -c 400,50%

//*cesty k souborum v kazdem samotnem jednotlivem systemu se muzou lisit//

====== Prikazy ======
Vsechny soubory v baliku:
  dpkg -L aide
  
Textovy editor:
  vim

netstat (only servers):
  netstat -nlpt

  touch
  
IP-adresy:
  ip a

Interface up:
  ifap -eth0

Procesy:
  top

Disk:
  df