Category: Centos

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How To Install VMware Workstation on CentOS 7

VMware Workstation on CentOS 7

For those of you who didn’t know, VMware Workstation is the most popular Virtualization software used at the desktop level on Linux like operating systems and Microsoft Windows. It allows the us to create and run multiple Virtual machines simultaneously. VMware Workstation is not an open source or free software so we need to buy its license key, though we can use its trail version for 30 days then later you can apply its license key.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

 

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation the VMware Virtualization on a CentOS 7 server.
Install VMware Workstation on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Installing VMware Workstation.

yum clean all
yum install kernel-headers kernel-devel
yum groupinstall "Development tools"
yum -y update

Step 2. Installing VMware Workstation.

First download the Vmware Workstation 14 Pro bundle package here.

Once the VMware workstation bundle file is downloaded, set the executable permissions on it with the below chmod command:

chmod a+x VMware-Workstation-Full-14.0.0-6661328.x86_64.bundle

Now let’s go ahead and start the installation of Vmware Workstation 14 pro by running the .bundle package. Refer the command below:

sudo ./VMware-Workstation-Full-14.0.0-6661328.x86_64.bundle

Accept the End User License Agreement:
End-User-License-Agreement-VMware-Workstation
Click on Next and disable product updates on startup:
VMware-Workstation-Product-Updates2
Specify the User Name which will have rights to connect to VMware workstation, in my case I using ‘idroot‘ as user name:
Linuxtechi-User-VMware-Workstation3
Click on next to proceed, you can also keep the default path. In my case I am also keeping the default directory:
Virtual-Machine-Storing-Path-VMware-WorkStation4
Specify the HTTPs port or keep default one:
HTTPs-Port-Debian9-VMware-Workstation5
Enter the License key in case you have already buy its license, else you can leave it blank:
License-Key-Debian9-VMware-Workstation6
In the next window, click on ‘Install‘ option to start its installation:
VMware-Workstation-Installation-Progress7
Once the Installation is successful, we will get the below window:
VMware-Workstation-Installation-Completed8
After the installation is finished, you can open the workstation from the CentOS 7 application menu under the System Tools sub category.

Congratulation’s! You have successfully installed VMware. Thanks for using this tutorial for installing VMware Virtualization on CentOS 7 systems. For additional help or useful information, we recommend you to check the official VMware Workstation web site.

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How To Install Apache Spark on CentOS 7

Apache Spark on CentOS 7

Apache Spark is a fast and general-purpose cluster computing system. It provides high-level APIs in Java, Scala and Python, and also an optimized engine which supports overall execution charts. It also supports a rich set of higher-level tools including Spark SQL for SQL and structured information processing, MLlib for machine learning, GraphX for graph processing, and Spark Streaming.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Installing Java.

Step 3. Installing Scala.

Step 4. Installing Apache Spark.

Step 5. Configure Firewall for Apache Spark.

Step 6. Accessing Apache Spark.

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step install Apache Spark on CentOS 7 server.
Install Apache Spark on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

yum clean all
yum -y install epel-release
yum -y update

Step 2. Installing Java.

Installing java for requirement install apache spark:

yum install java -y

Once installed, check java version:

java -version

Step 3. Installing Scala.

Spark installs Scala during the installation process, so we just need to make sure that Java and Python are present:

wget http://www.scala-lang.org/files/archive/scala-2.10.1.tgz
tar xvf scala-2.10.1.tgz
sudo mv scala-2.10.1 /usr/lib
sudo ln -s /usr/lib/scala-2.10.1 /usr/lib/scala
export PATH=$PATH:/usr/lib/scala/bin

Once installed, check scala version:

scala -version

Step 4. Installing Apache Spark.

Install Apache Spark using following command:

wget http://www-eu.apache.org/dist/spark/spark-2.2.1/spark-2.2.1-bin-hadoop2.7.tgz
tar -xzf spark-2.2.1-bin-hadoop2.7.tgz
export SPARK_HOME=$HOME/spark-2.2.1-bin-hadoop2.7
export PATH=$PATH:$SPARK_HOME/bin

Setup some Environment variables before you start spark:

echo 'export PATH=$PATH:/usr/lib/scala/bin' >> .bash_profile
echo 'export SPARK_HOME=$HOME/spark-1.6.0-bin-hadoop2.6' >> .bash_profile
echo 'export PATH=$PATH:$SPARK_HOME/bin' >> .bash_profile

The standalone Spark cluster can be started manually i.e. executing the start script on each node, or simple using the available launch scripts. For testing we can run master and slave daemons on the same machine:

./sbin/start-master.sh

Step 5. Configure Firewall for Apache Spark.

firewall-cmd --permanent --zone=public --add-port=6066/tcp
firewall-cmd --permanent --zone=public --add-port=7077/tcp
firewall-cmd --permanent --zone=public --add-port=8080-8081/tcp
firewall-cmd --reload

Step 6. Accessing Apache Spark.

Apache Spark will be available on HTTP port 7077 by default. Open your favorite browser and navigate to http://yourdomain.com:7077 or http://server-ip:7077 and complete the required the steps to finish the installation.
apache-spark-installation
Congratulation’s! You have successfully installed Apache Spark on CentOS 7. Thanks for using this tutorial for installing Apache Spark on CentOS 7 systems. For additional help or useful information, we recommend you to check the official Apache Spark web site.

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How To Install Nginx Mainline Version on CentOS 7

Nginx Mainline Version on CentOS 7

Nginx has two primary repositories or branches that folks can use to install or update Nginx packages. When you install Nginx from CentOS default repositories, you’re installing Nginx from the stable repository.

Every new feature is added to the mainline repository first and after it has been tested and proven to be stable, before the repository switches to be stable. If you’re not overly cautious and wish to install the latest and greatest Nginx packages and features, you may have to install Nginx from it Mainline repository.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Installing Mainline version.

 

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step install Nginx mainline version on CentOS 7 server.
Install Nginx Mainline Version on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

yum clean all
yum -y update

Step 2. Installing Mainline version.

First, create nginx repository file in CentOS:

nano /etc/yum.repos.d/nginx.repo

Add these lines into the file and save it:

[nginx.org]
name=nginx.org repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=1
enabled=1

Now update repositories and install Nginx:

yum update
yum install nginx -y

Check Nginx version:

### nginx -v
nginx version: nginx/1.13.8

Start Nginx and add it to automatically start on your system start-up using:

systemctl restart nginx
systemctl enable nginx

You can verify that Nginx is really running by opening your favorite web browser and entering the URL http://your-server’s-address, if it is installed, then you will see this:
nginx-default-page
Congratulation’s! You have successfully installed Nginx on CentOS 7. Thanks for using this tutorial for installing Nginx mainline version web server on CentOS 7 systems. For additional help or useful information, we recommend you to check the official Nginx web site.

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How To Install Nginx Amplify Agent on CentOS 7

Nginx Amplify Agent on CentOS 7

Nginx Amplify Agent is a Strong Nginx monitoring tool written in Python. Its function is to collect various metrics and metadata and send Them securely into the backend for storage and visualization. After appropriate Installation, it supplies you with NGINX Amplify web interface and also you Should observe real-time metrics to your monitored systems.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Installing Nginx Amplify Agent.

Step 3. Configuring the Nginx Amplify Agent.

 

 

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation the Nginx Amplify Agent monitoring tool on a CentOS 7 server.
Install Nginx Amplify Agent on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

yum clean all
yum -y update

Step 2. Installing Nginx Amplify Agent.

First, Create a repo file:

# cat >/etc/yum.repos.d/nginx-amplify.repo <

Install the Nginx Amplify Agent rpm package:

yum install nginx-amplify-agent

Verify the installtion by inspectivng the log file ‘/var/log/amplify-agent/agent.log‘

Once installed, These commands can be used to start/stop the agent:

systemctl enable amplify-agent
systemctl start amplify-agent

Step 3. Configuring the Nginx Amplify Agent.

Checklist:

    stub status
    extended access logging
    ‘warn’ level on error logging

server {
 listen [::]:80;
 server_name bmw.idroot.us localhost [::1] 127.0.0.1;
 keepalive_timeout 60;

location /nginx_status {
 stub_status;
 access_log off;

allow ::1;
 allow 127.0.0.1;
 deny all;
 }
}

The logging needs to be confiured to have extended information as per the documentation:

log_format  main      '$remote_addr - $remote_user [$time_local] "$request" '
                      ' $status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for" '
                      'rt=$request_time ua="$upstream_addr" '
                      'us="$upstream_status" ut="$upstream_response_time" '
                      'ul="$upstream_response_length" '
                      'cs=$upstream_cache_status' ;

Ensure warnings are logged to the error log:

error_log /var/log/nginx/error.log warn

Finally steps, You can overview the status of our monitored server in the Web interface logging to your Amplify Account as in the snapshot:
nginx-amplify-agent
Congratulation’s! You have successfully installed Nginx Amplify. Thanks for using this tutorial for installing Nginx Amplify monitoring tool on CentOS 7 systems. For additional help or useful information, we recommend you to check the official Nginx Amplify Agent web site.

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How To Install LibreNMS on CentOS 7

LibreNMS on CentOS 7

LibreNMS is an open source auto-discovering network monitoring tool for servers and network hardware. It supports a wide range of network hardware like Cisco, Juniper, Brocade, Foundry, HP and operating systems including Linux and Windows. LibraNMS is a community-based fork of Network monitoring tool “Observium“, released under GPLv3.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Install LAMP server.

Step 3. Installing LibreNMS.

Step 4. Configuring MariaDB for LibreNMS.

Step 5. Configure Apache web server for LibreNMS.

Step 6. Configure Firewall.

Step 7. Accessing LibreNMS.

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation the LibreNMS network monitoring tool on a CentOS 7 server.
LibreNMS Features

Automatic discovery
Customisable alerting
API Access
Billing system
Automatic Updates
Distributed Polling
iOS and Android App
Unix Agent
And many more

Install LibreNMS on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

yum clean all
yum -y update

Step 2. Install LAMP server.

A CentOS 7 LAMP stack server is required. If you do not have LAMP installed, you can follow our guide here. Also install required PHP modules:

yum -y install php-gd php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-mssql php-snmp php-soap php-tidy curl curl-devel ImageMagick jwhois nmap mtr rrdtool net-snmp-utils vixie-cron php-mcrypt fping git
pear install Net_IPv4-1.3.4
pear install Net_IPv6-1.2.2b2

Step 3. Installing LibreNMS.

First, Add LibreNMS user:

useradd librenms -d /opt/librenms -M -r
usermod -a -G librenms apache

Next, clone LibreNMS repo on /opt directory:

cd /opt/
git clone https://github.com/librenms/librenms.git librenms

Set the correct permission to the librenms directory:

chown -R librenms:librenms /opt/librenms

Step 4. Configuring MariaDB for LibreNMS.

By default, MariaDB is not hardened. You can secure MariaDB using the mysql_secure_installation script. you should read and below each steps carefully which will set root password, remove anonymous users, disallow remote root login, and remove the test database and access to secure MariaDB:

mysql_secure_installation

Configure it like this:

- Set root password? [Y/n] y
- Remove anonymous users? [Y/n] y
- Disallow root login remotely? [Y/n] y
- Remove test database and access to it? [Y/n] y
- Reload privilege tables now? [Y/n] y

Next we will need to log in to the MariaDB console and create a database for the LibreNMS. Run the following command:

mysql -u root -p

This will prompt you for a password, so enter your MariaDB root password and hit Enter. Once you are logged in to your database server you need to create a database for LibreNMS installation:

MariaDB [(none)]> CREATE DATABASE librenms CHARACTER SET utf8 COLLATE utf8_unicode_ci;
MariaDB [(none)]> CREATE USER 'librenms'@'localhost' IDENTIFIED BY 'PASSWORD';
MariaDB [(none)]> GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost';
MariaDB [(none)]> FLUSH PRIVILEGES;
MariaDB [(none)]> exit

Next, open the MariaDB configuration file and add the following lines under [mysqld] section:

### nano /etc/mysql/mariadb.conf.d/50-server.cnf

innodb_file_per_table=1
sql-mode=""
lower_case_table_names=0

Restart MariaDB for the changes to take effect:

systemctl restart mariadb

Step 5. Configure Apache web server for LibreNMS.

We will create Apache virtual host for your LibreNMS website. First create ‘/etc/httpd/conf.d/vhosts.conf’ file with using a text editor of your choice:

nano /etc/httpd/conf.d/vhosts.conf
IncludeOptional vhosts.d/*.conf

Next, create the virtual host:

mkdir /etc/httpd/vhosts.d/
nano /etc/httpd/vhosts.d/yourdomain.com.conf

Add the following lines:

ServerAdmin [email protected]
DocumentRoot /opt/librenms/html/
ServerName yourdomain.com
ServerAlias www.yourdomain.com
ErrorLog "/var/log/httpd/yourdomain.com-error_log"
CustomLog "/var/log/httpd/yourdomain.com-access_log" combined

<Directory "/opt/librenms/html/">
DirectoryIndex index.html index.php
Options FollowSymLinks
AllowOverride All
Require all granted

Save and close the file. Restart the apache service for the changes to take effects:

systemctl restart httpd.service

Step 6. Configure Firewall.

Allow apache through the firewall so that user can able to access LibreNMS portal from an external machine:

firewall-cmd --permanent --add-port=80/tcp
firewall-cmd --reload

Step 7. Accessing LibreNMS.

LibreNMS will be available on HTTP port 80 by default. Open your favorite browser and navigate to http://yourdomain.com/ or http://server-ip/ and complete the required the steps to finish the installation. If you are using a firewall, please open port 80 to enable access to the control panel.

Congratulation’s! You have successfully installed LibreNMS. Thanks for using this tutorial for installing LibreNMS network monitoring tool on CentOS 7 systems. For additional help or useful information, we recommend you to check the official LibreNMS web site.

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How To Install PowerShell on CentOS 7

PowerShell on CentOS 7

PowerShell Core is a cross-platform (Windows, Linux, and macOS) automation and configuration tool/framework that works well with your existing tools and is optimized for dealing with structured data (e.g. JSON, CSV, XML, etc.), REST APIs, and object models. It includes a command-line shell, an associated scripting language and a framework for processing cmdlets.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Installing PowerShell on CentOS 7.

 

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step install PowerShell Microsoft on CentOS 7 server.
Install PowerShell on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

yum clean all
yum -y install epel-release
yum -y update

Step 2. Installing PowerShell on CentOS 7.

Method 1.

PowerShell Core for Linux is published to official Microsoft repositories for easy installation:

curl https://packages.microsoft.com/config/rhel/7/prod.repo | sudo tee /etc/yum.repos.d/microsoft.repo

Install PowerShell using following command:

sudo yum install -y powershell

Start PowerShell:

pwsh

Method 2.

Install PowerShell using RPM package:

yum install https://github.com/PowerShell/PowerShell/releases/download/v6.0.0/powershell-6.0.0-1.rhel.7.x86_64.rpm

Then execute the following in the terminal:

sudo yum install powershell-6.0.0-1.rhel.7.x86_64.rpm

PowerShell is installed, launch it with the help of following command:

powershell

Congratulation’s! You have successfully installed PowerShell on CentOS 7. Thanks for using this tutorial for installing PowerShell Microsoft on CentOS 7 systems. For additional help or useful information, we recommend you to check the official PowerShell web site.

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How To Install IOPing on CentOS 7

IOPing on CentOS 7

IOPing lets you to benchmark the storage performance is to measure the latency of individual requests. IOPing is a simple tool that does just that. It runs I/O requests to the storage device to benchmark the time to reply. The results display disk latency in the same way ping –test measures network latency.

Table of Contents

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Installing IOPing.

Step 3. Usage IOPing.

Prerequisites

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step install IOPing on CentOS 7 server.
Install IOPing on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

yum clean all
yum -y install epel-release
yum -y update

Step 2. Installing IOPing.

First, create and navigate to the directory where ioping will be installed:

cd ~
mkdir ioping
cd ioping

Download the installation file using wget. We will be using version 0.8 from their Google Code repository:

wget https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/ioping/ioping-0.8.tar.gz
tar -xzvf ioping-0.8.tar.gz

Enter the directory and compile ioping:

cd ioping-0.8
make ioping

Step 3. Usage IOPing.

Ioping has a list of built-in commands. Run ioping without any arguments to show the list:

ioping

To show sequential latency, enter the following command:

ioping -R /dev/sda

To determine the latency of the entire drive, run this command:

ioping -c 10 /

Congratulation’s! You have successfully installed IOPing on CentOS 7. Thanks for using this tutorial for installing IOPing on CentOS 7 systems. For additional help or useful information, we recommend you to check the official IOPing web site.