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How to capture and analyze packets with tcpdump command on Linux
tcpdump is a well known command line packet analyzer tool. Using tcpdump command we can capture the live TCP/IP packets and these packets can also be saved to a file. Later on these captured packets...
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How to Install and Configure Nginx ‘Web Server’ on Ubuntu 18.04 / Debian 9
Nginx is a free and open source web server, it can also be used as reverse proxy, HTTP load balancer, HTTP Cache and mail proxy. Nginx is available for all the Unix like operating systems and released...
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How to Boot Ubuntu 18.04 / Debian 9 Server in Rescue (Single User mode) /...
Booting a Linux Server into a single user mode or rescue mode is one of the important troubleshooting that a Linux admin usually follow while recovering the server from critical conditions. In Ubuntu...
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How to Install Open Source Zimbra Mail Server (ZCS 8.8.10) on CentOS 7
Mail Server is one of the important and critical Server for any organization as most of business communication done via emails only. In Open source world there are couple of free email server but...
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How to Install VirtualBox and Extension Pack on Elementary OS 5.0 (Juno)
VirtualBox is a free and open source Virtualization tool that allows to run multiple virtual machines at same time on your Linux and Windows desktop or laptop. VirtualBox is generally used at desktop...
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How to Install and Configure FreeIPA on CentOS 7 Server
FreeIPA is a free and open source identity management tool, it is the upstream project for Red Hat identity manager. Using FreeIPA tool, we can easily manage centralized authentication along with...
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How to Configure FreeIPA Client on Ubuntu 18.04 / CentOS 7 for Centralize...
In our previous article we have already discussed about FreeIPA and its installation steps on CentOS 7 Server, in this article we will discuss how an Ubuntu 18.04 and CentOS 7 machine can be integrated...
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How to Generate sosreport on Ubuntu 18.04 / Debian 9 Server
SOS is a tool which is used to collect all the system configuration, logs and diagnostic information and archive it into a single file. Sosreport is generally required for technical support engineers...
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OpenStack Deployment using Devstack on CentOS 7 / RHEL 7 System
Devstack is a collection of scripts which deploy the latest version of openstack environment on virtual machine, personal laptop or a desktop. As the name suggests it is used for development...
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How to Resize OpenStack Instance (Virtual Machine) from Command line
Being a Cloud administrator, resizing or changing resources of an instance or virtual machine is one of the most common tasks. In Openstack environment, there are some scenarios where cloud user has...
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Install and Configure Kubernetes (k8s) 1.13 on Ubuntu 18.04 LTS / Ubuntu 18.10
Kubernetes is a free and open source container orchestration tool. It is used to deploy container based applications automatically in cluster environment, apart from this it also used to manage Docker...
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Quick guide to Install and Configure Ceph (Distributed Storage) Cluster on...
Ceph is free and open source distributed storage solution through which we can easily provide and manage block storage, object storage and file storage. Ceph storage solution can be used in traditional...
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How to Install and Configure KVM on OpenSUSE Leap 15
KVM is virtualization module that is loaded inside the Linux kernel and then linux kernel start working as a KVM hypervisor. KVM stands for Kernel based Virtual Machine. Before start installing KVM on...
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Configure two node Squid (Proxy Server) Clustering using Pacemaker on CentOS...
As we all know that squid is a caching proxy server which supports the protocols like HTTP, HTTPS, FTP and more. In other words, squid is known as a web proxy server which helps the ISPs and other...
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How to Install and Configure OTRS (Ticketing Tool) on CentOS 7 / RHEL 7
OTRS is a free and open source ticketing tool available for Linux like operating systems. OTRS stands for “Open Source Trouble Ticket System“. In opensource world it is one of the most popular trouble...
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Quick Guide on Docker Utilities, Daemon and its other capabilities
Introduction Docker is playing very critical role as both a packaging format for the applications and a unifying interface and methodology that enables the application team/s to own the...
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Monitor and Manage Docker Containers with Portainer.io (GUI tool) – Part-1
As Docker usage and adoption is growing faster and faster, monitoring Docker container images is becoming more challenging. As multiple Docker container images are getting created day-by-day,...
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How to Setup Local Yum/DNF Repository on RHEL 8 Server Using DVD or ISO File
Recently Red Hat has released its most awaited operating system “RHEL 8“, in case you have installed RHEL 8 Server on your system and wondering how to setup local yum or dnf repository using...
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Monitor and Manage Docker Containers with Portainer.io (GUI tool) – Part-2
As a continuation of Part-1, this part-2 has remaining features of Portainer covered and as explained below. Monitoring docker container images shashi@linuxtechi ~}$ docker ps -a CONTAINER ID...
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How to Download and Use Ansible Galaxy Roles in Ansible Playbook
Ansible is tool of choice these days if you must manage multiple devices, be it Linux, Windows, Mac, Network Devices, VMware and lot more. What makes Ansible popular is its agent less feature and...
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