Install MariaDB 10 on Centos or Springdale Linux

Step 1: Add MariaDB Yum Repository

Start by adding the MariaDB YUM repository file MariaDB.repo for RHEL/CentOS and Fedora systems.

# nano /etc/yum.repos.d/MariaDB.repo

Now add the following lines to your respective Linux distribution version as shown.

[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.1/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

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Install VirtualBox legacy version 5.x on CentOS 7

Install Dependencies

Install Extra Packages for Enterprise Linux (EPEL)

# sudo yum install epel-release wget -y

Install Dynamic Kernel Module Support (DKMS)

# sudo yum --enablerepo=epel install dkms -y

This will install quite a few packages:

Install Development Tools

# sudo yum groupinstall "Development Tools" -y

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How to Disable Network Manager on CentOS 7

1. To disable the Network Manager service, perform the following steps:

Disable Network Manager with the following commands:

CentOS 6, CloudLinux 6, Red Hat Enterprise Linux 6 (RHEL), or Amazon Linux:

service NetworkManager stop
chkconfig NetworkManager off

CentOS 7, CloudLinux 7, or RHEL 7:

systemctl stop NetworkManager
systemctl disable NetworkManager

2. Change to the /etc/sysconfig/network-scripts directory.

3. Open the ifcfg-eth0 and ifcfg-lo files with your preferred text editor and, if they exist, set the following keys’ Continue reading “How to Disable Network Manager on CentOS 7” »

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Install SmokePing on CentOS 7

This tutorial explains how to install Tobias Oetiker’s Smokeping into /opt/smokeping on a CentOS 7 box.

Features of Smokeping:
– Best of breed latency visualisation.
– Interactive graph explorer.
– Wide range of latency measurement plugins.
– Master/Slave System for distributed measurement.
– Highly configurable alerting system.
– Live Latency Charts with the most ‘interesting’ graphs.
– Free and open-source Software written in Perl written by Tobi Oetiker, the creator of MRTG and RRDtool Continue reading “Install SmokePing on CentOS 7” »

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Cloning KVM virtual machine using CLI

To clone your VM and spawn new instances in KVML

# virt-clone --original {Domain-Vm-Name-Here} --auto-clone

OR

# virt-clone --original {Domain-Vm-Name-Here} --name {New-Domain-Vm-Name-Here} --auto-clone

OR

# virt-clone --original {Domain-Vm-Name-Here} \
--name {New-Domain-Vm-Name-Here} --file {/var/lib/libvirt/images/File.Name.here}

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Install and Secure Redis on CentOS 7

Step 1 – Install and Enable Remi Repository

Firstly, we will add the Remi repository to the CentOS 7 system. The Remi repository provides the latest version of Redis package for our installation.

Before adding the Remi repository, let’s install the EPEL repository and yum utility packages.

sudo yum install epel-release yum-utils

Now add the Remi repository for CentOS 7 using the yum command below.

sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

After that, enable the ‘remi’ repository using the yum-config-manager tool as below.

sudo yum-config-manager --enable remi

The Remi repository has been added and enabled on the CentOS 7 system, check using the yum command Continue reading “Install and Secure Redis on CentOS 7” »

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Install MongoDB on CentOS 7

Follow the steps below to install the latest stable version of MongoDB on your CentOS server :

Enabling MongoDB repository

To add the MongoDB repository to your system, open your text editor and create a new YUM repository configuration file named mongodb-org.repo inside the /etc/yum.repos.d/ directory:

nano /etc/yum.repos.d/mongodb-org.repo
[mongodb-org-4.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc

If you want to install an older version of MongoDB, replace each instance of 4.0 with your preferred version. Continue reading “Install MongoDB on CentOS 7” »

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CentOS 7 XFS disk resizing

Couldn’t find any article that explained step by step how to resize the main disks volume in a CentOS 7 vm. In my example I started witha single disk of 8GB and expanded to 20GB. I have two partitions on disk sda

sda1 type Linux for boot
sda2 type Linux LVM for the remaining logical volumes

Space utilisation as following:

[root@vcd-c1-s1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.8M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 6.2G 1.9G 4.4G 31% /
/dev/sda1 1014M 179M 836M 18% /boot
tmpfs 783M 0 783M 0% /run/user/0

We basically need to: Continue reading “CentOS 7 XFS disk resizing” »

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Install webmin on Centos 7 using Yum

Create and open this new file using your text editor:

sudo vi /etc/yum.repos.d/webmin.repo

Then add these lines to the file to define the new repository:

nano /etc/yum.repos.d/webmin.repo
[Webmin]
name=Webmin Distribution Neutral
#baseurl=http://download.webmin.com/download/yum
mirrorlist=http://download.webmin.com/download/yum/mirrorlist
enabled=1

Save the file and exit the editor. Continue reading “Install webmin on Centos 7 using Yum” »

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Upgrade Python 2.7 to 3.6 and installing pip on CentOS 7

Installing Development Tools

Development tools are required for building Python modules. To install the necessary tools and libraries type:

sudo yum groupinstall 'Development Tools'

Enable Software Collections (SCL)

Software Collections , also known as SCL is a community project that allows you to build, install, and use multiple versions of software on the same system, without affecting system default packages. By enabling SCL you will gain access to the newer versions of programming languages and services which are not available in the core repositories.

CentOS 7 ships with Python 2.7.5 which is a critical part of the CentOS base system. SCL allows you to install newer versions of python 3.x alongside the default python v2.7.5 so that system tools such as yum will continue to work properly.

To enable SCL, you need to install the CentOS SCL release file. It is part of the CentOS extras repository and can be installed by running the following command:

sudo yum install centos-release-scl

Continue reading “Upgrade Python 2.7 to 3.6 and installing pip on CentOS 7” »

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