How to configure a host in Zabbix frontend

To configure a host in Zabbix frontend, Follow below steps:

1. Go to: Configuration → Hosts
2. Click on Create host to the right 
3. Enter parameters of the host in the form. 

Zabbix agent configuration panel has multiple parameters which need to enter in the Front end. For details about how to add a Linux host to Zabbix Server please watch the below video.

How to install Zabbix Agent on Linux

A Zabbix Agent runs on various supported platforms, including Linux, UNIX and Windows, and collects data such as Memory, CPU, disk, and network interface usage from a device.

Using Zabbix-agent you can monitor CPU load, CPU utilization, Free memory, memory utilization, service status, Free disk space, and many other parameters.

For more information about the installation procedure of zabbix agent, please watch the below YouTube video.

How to install Zabbix Server on Ubuntu

Zabbix is the enterprise-class open-source monitoring software for various IT components including server, network, virtual machine, cloud service, database, web monitoring, service, and storage device.

For installation of the Zabbix Server on Ubuntu, please watch the below video.

How to upgrade ubuntu server from Ubuntu 16.04 to Ubuntu 18.04

Ubuntu 16.04 LTS becomes EOL on Apr 2021. Ubuntu supports upgrade from one LTS to the next LTS in sequential order. To upgrade a server system follow the below steps. 

• Confirm OS version is Ubuntu 16.04 using command lsb_release –a 

• Update all the software packages repository list and upgrade packages on the existing system using the below command. It's recommended to reboot the system after all updates are applied. 

            sudo apt-get update

            sudo apt-get upgrade -y

            sudo apt-get dist-upgrade -y

• Install the Ubuntu Update Manager using the below command.

                    sudo apt-get install update-manager-core

• Make sure the Prompt line in /etc/update-manager/release-upgrades is set to 'lts' if you only want LTS upgrades.

• Upgrading to Ubuntu 18.04. To begin this process run the following command:

            sudo do-release-upgrade

• Before making any changes the above command will first verify whether the system is ready to update or not. The user will get prompted with information about the upgrade. Press Y to continue.
• After you enter the upgrade command, you will be asked to confirm that you want to update via SSH. Type Y to continue.

• Now Ubuntu will check for the packages that need the update and gives the information about the packages which will be added, removed, and the size of the update.

• The up-gradation process will take some time. During the up-gradation process, you may receive a prompt that will require your input. Kindly select a suitable option for you. You will have to select whether you want to install the new version of the file and overwrite the changes, keep the currently installed version, or merge the files.

• During the upgrade, it will ask to remove obsolete software Press Y to continue.

• After completion of the upgrade process, a system restart will be required.

• Post restart you may verify the Ubuntu version using lsb_release –a. 

KB: https://ubuntu.com/server/docs/upgrade-introduction

How to upgrade PostgreSQL9.5 to 12

PostgreSQL9.5 is the end of life now. You can use the steps mentioned in the below video to upgrade PostgreSQL9.5 to 12.

Before upgrade please make sure sufficient disk space is available. Some extensions like. PostGIS will not be upgraded during this process. You may drop the extension from 9.5, installed it on Postgres12, and create the extension. It's recommended to take a backup before doing the up-gradation process on the production environment.

Please find the below list of commands used in the up-gradation process. # Install the repository RPM:

sudo yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm

# Install PostgreSQL9.5:

sudo yum install -y postgresql95-server

# Initialize the database and start service:

sudo /usr/pgsql-9.5/bin/postgresql95-setup initdb

# Install PostgreSQL12:

# Initialize the database and start service:

sudo yum install -y postgresql12-server

# PostgeSQL upgrade command syntax

sudo /usr/pgsql-12/bin/postgresql-12-setup initdb

# PostgeSQL Cluster compatibity check

pg_upgrade -b oldbindir -B newbindir -d oldconfigdir -D newconfigdir [option...]

/usr/pgsql-12/bin/pg_upgrade --old-bindir /usr/pgsql-9.5/bin/ --new-bindir /usr/pgsql-12/bin/ --old-datadir /var/lib/pgsql/9.5/data/ --new-datadir /var/lib/pgsql/12/data --link --check

# Upgrade Command /usr/pgsql-12/bin/pg_upgrade --old-bindir /usr/pgsql-9.5/bin/ --new-bindir /usr/pgsql-12/bin/ --old-datadir /var/lib/pgsql/9.5/data/ --new-datadir /var/lib/pgsql/12/data --link