Nagios: howto become a happy network and system monitoring engineer

define service {
name check-swap-by-ssh
service_description SWAP via ssh
use basic-service
notification_interval 60
contact_groups r71
notification_options c,r
notification_period 24×7
check_command check_by_ssh!swap
register 0
}

define service{
use check-swap-by-ssh
hostgroup_name linux-servers
}

define service {
name check-diskspace-by-ssh
service_description DISK SPACE via ssh
use basic-service
notification_interval 60
contact_groups r71
notification_options c,r
notification_period 24×7
check_command check_by_ssh!disk
register 0
}

define service{
use check-diskspace-by-ssh
hostgroup_name linux-servers
}