How does Prometheus gather information about monitored hosts and services?

• A.It implements the ICMP and SNMP protocols to ping and query remote services.
• B.It opens a webhook where monitored applications have to submit various metrics.
• C.It uses HTTP to retrieve JSON encoded metrics from the monitored objects.
• D.It queries a relational database for metrics written to the database by monitored applications.
• E.It runs scripts on the Prometheus server which perform tests and return various metrics.

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Add users: user2, user3.
The Additional group of the two users: user2, user3 is the admin group Password: redhat

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SIMULATION
According the following requirements to create a local directory /common/admin.
This directory has admin group.
This directory has read, write and execute permissions for all admin group members.
Other groups and users don't have any permissions.
All the documents or directories created in the/common/admin are automatically inherit the admin group.

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Please open the ip_forward, and take effect permanently.

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Configure your Host Name, IP Address, Gateway and DNS.
Host name: dtop5.dn.ws.com
IP Address: 172.28.10.5/4
Gateway: 172.28.10.1
DNS: 172.28.10.1

Correct Answer:

Configure Host Name
vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=dtop5.dn.ws.com GATEWAY=172.28.10.1
2. Configure IP Address, Gateway and DNS
Configure the network by Network Manager:

Note: Please remember to choose two options:
Connect automatically
Available to all users
Click "Apply", save and exit, and restart your network services:
# Service network restart
3. Validate these profiles:
a) Check gateway: # vim / etc / sysconfig / network
NETWORKING=yes
HOSTNAME=dtop5.dn.ws.com
GATEWAY=172.28.10.1
b) Check Host Name: # vim /etc/hosts

c) Check DNS: # vim /etc/resolv.conf
# Generated by NetworkManager
Search dn.ws.com
Nameserver 172.28.10.1
d) Check Gateway: # vim /etc/sysconfig/network-scripts/ifcfg-eth0

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