Install the Operating System
Boot from the USB flash drive and select Install CentOS 7
When the welcome screen of the CentOS installer appears, choose your language and just click on Continue Continue reading “CentOS 7 Server Installation with Software RAID” »
Preqrequsite:
It’s better to have installed development tools and disable NetworkManager for a produciton envrionment. You can optionally follow the steps-
Disabling NetworkManager:
systemctl stop NetworkManager
systemctl disable NetworkManager
Install Development Tools:
yum group install "Development Tools"
Remove MariaDB pre-installed libraries-
yum -y remove mariadb-libs
Enable MySQL Repository
First of all, You need to enable MySQL 5.7 community release yum repository on your system. The rpm packages for yum repository configuration are available on MySQL’s official website.
First of all, import the latest MySQL GPG key to your system.
sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
Now, use one of the below commands to configure the Yum repository as per your operating system version. Continue reading “Install MySQL 5.7 on CentOS 7” »
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
Continue reading “Install MariaDB 10 on Centos or Springdale Linux” »
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
Continue reading “Install VirtualBox legacy version 5.x 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” »
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” »
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}
Continue reading “Cloning KVM virtual machine using CLI” »
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” »
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” »
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” »