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Docker Part 1

Create, Start, stop and remove containers

This tutorial is related to creating, starting, stopping and removing containers.

Containers are small in size compared to virtual machines, even you can run containers within seconds. Containers don’t need virtualization host or hypervisor.

Create or run a container

If you an image on your host then docker will . . . → Read More: Docker Part 1

[Hindi CBTs] CCNA - Basic Routing Concepts

This video is related to what are the concepts of Routing in Networking, how routers perform routing, what is routing table, administrative distance, best path, best path selection and many more.

[Hindi CBTs] CCNA - Router basic configuration 1

This video is an extension of the previous video. You will the concepts of serial cables. How to add serial card / module in Cisco Router, how to compare different series or routers and how to attach module in cisco router in packet tracer add serial cable.

This video also covers concepts of DCE/DTE and . . . → Read More: [Hindi CBTs] CCNA – Router basic configuration 1

[CCNA] Basic Router and Switch Configuration.

You can learn basic router and switch configuration by watching this video. I covered configuration like hostname, ip address on interface, telnet configuration, save the configuration, backup configuration on tftp server and other.


How to configure DNS server on linux (CentOS /RHEL)

DNS (Domain Name System) used to covert internet names (Websites/server names) to IP address. It is the hierarchical naming system to get information about networked resources. The hierarchical structure is organized in the domain which holds the information of host and others in the resource records.

DNS Hierarchy

On the top of the . . . → Read More: How to configure DNS server on linux (CentOS /RHEL)

RAID (Redundant Array of Independent Disk) Fundamentals and Configuration

In late 1980’s, the rapid adoption of computers for the business processes increased the growth of applications and databases which increased the demand for the storage capacity. That time data was stored in large expensive disks called Single Large Expensive Drive (SLED). The single disk does not provide performance and flexibility.

. . . → Read More: RAID (Redundant Array of Independent Disk) Fundamentals and Configuration

Logical Volume Management (LVM on CentOS)

Generally, the disk has multiple partitions because it provides separation between data types but it does not offer flexibility. It is not possible to dynamically grow partitions when running out of space.

LVM provides greater flexibility. You can extend and resize volumes. LVM has several layers where lower layer consists of . . . → Read More: Logical Volume Management (LVM on CentOS)

Scheduling tasks on Linux machine(CentOS)

Sometimes you need to run certain tasks on certain time. You can configure tasks to run in future. Cron helps you to run jobs scheduled times. Cron daemons look every minute whether there is a job to do.

By default cron service started by default. because some systems tasks are running through cron like logrotate, . . . → Read More: Scheduling tasks on Linux machine(CentOS)

Process Management in Linux

Everything which happens on linux server is a process. For that reason, process management is a key skill for the administrators. Process can be classified into two parts –

shell jobs (starts from the command line) Service Daemons

When the process starts, It can use multiple threads.


When the user types a . . . → Read More: Process Management in Linux

Create own package repository in CentOS or RHEL

If you learned package management in my last post, yum requires an internet connection to each and every host to update the package which can consume lots of bandwidth. If you have a limited amount of bandwidth, then you can create your own repository server to update other machines.

Creating repository requires some steps which . . . → Read More: Create own package repository in CentOS or RHEL