Choudary Abdul Qayoom

I G Internet Generation In Today world we are facing 3g,4g etc but we dont know what exactely they are.I try here to explain these concept in detail: Brief History On April 3, 1973, Martin Cooper, a Motorola researcher and executive, made the first mobile telephone call from handheld subscriber equipment, placing a call to Dr. Joel S. Engel of Bell Labs, his rival In India    The then Union Telecom Minister Sukh Ram and the then Chief Minister of West Bengal Jyoti Basu spoke to each other using hand held mobile phones on July 31, 1995. It was a first for India 1G 1st Generation. Technology used: Analog radio signal speed: 2.4kbps service: voice only 2G The second generation of mobile cellular networks were launched in 1991 under the GSM standard. The main difference between the previous first generation and newer generation, was changing from analog based to digital based type of communication Technology: General Packet radio Se

ELK Step by Step Guide  Following is detail of elk ,how we install,start  and run. and prepare report I install elk on Docker with following step: Step1 Check the status of docker:   Step2    I have created "docker" folder on my machine. Step3   I have created three folder in docker folder:   config    data  docker-compose.yml Step4 Then configure these folder with following is the step and data: we can change these configration with our requirement,  First Configure docker-compose.yml  version: "2.0" services:  elk:   image: sebp/elk:latest   ports:     - "5601:5601"     - "9200:9200"     - "5044:5044"     - "9300:9300"   volumes:         - "/home/keenable/docker/data:/tmp/in_data"         - "/home/keenable/docker/elastic:/var/lib/elasticsearch"         - "/home/keenable/docker/config:/etc/logstash/conf.d"   container_name: elk1

Linux Link Following are important link releated to linux:  Ubuntu Debian releated:  1: https://www.debian.org/doc/manuals/debian-reference/ch02.en.html   2: https://wiki.debian.org/DebianPackageManagement AD Integration Link: http://www.overclockers.com/forums/showthread.php/709625-HowTO-Sync-Active-Directory-with-Directory-Server   Squid Link: 1:  https://www.linuxnix.com/troubleshooting-squid-reverse-proxy-server/ Shell Scripting:  1: https://bash.cyberciti.biz/guide/Main_Page   2:  http://matt.might.net/articles/bash-by-example/ 3:  http://www.freeos.com/guides/lsst/ Mail Relay: https://easyengine.io/tutorials/linux/ubuntu-postfix-gmail-smtp/   https://devanswers.co/configure-postfix-to-use-gmail-smtp-on-ubuntu-16-04-digitalocean-droplet/   Perl: www.perltutorial.org   DNS: 1: https://www.interserver.net/tips/kb/dns-dns-hierarchy/ 2: https://en.wikipedia.org/wiki/Domain_name_registry 3: https://en.wikipedia.org/wiki/DNS_zone 4: ht

Short Cut Command In Linux In this article I an going to describe some short cut command which are very helpful while performing certain task such as editing file,controlling process . For Screen:  These command used while doing activities on screen like: ctrl+l :  Clear the screen,same as 'Clear' command    ctrl+s : pause output on screen.if we have run a command that have long verbose out put we use this command, pause it and do another work along running that command. ctrl+q: resuming pause . File Editing:   These command used while writing or editing a file: ctrl+a: Move the cursor to the start of the line. ctrl+e: move the cursor to the end of the line. ctrl+b: move the cursor back one character at time. ctrl+f: move the cursor forward one character at time. ctrl+d: delete the character under the cursor ctrl+k: remove all textfrom the cursor through end of the line. ctrl+x: remove all the text from the cursor through begning of the li

Postfix installation Step by step I have already posted on Zimbra mail service, now i am going to share  how to install and configure postfix mail server using devocot and squrell mail service, suggest you go into detail study of post fix and other mail server before going to install and use, and different mail protocol i will publish all these on my later edition.Here i  am  going to tell you some future of post fix mail server,and why we choose postfix. What is post fix? Postfix is an open-source Mail Transport Agent ( MTA ), which supports protocols like LDAP, SMTP AUTH (SASL), and TLS. Operating systems: Postfix runs on every Unix and Linux Operating syst em,It is the default MTA of Linux and Ubuntu  operating systems.To install Post fix first we need to uninstall default post fix. Architecture: Postfix consists of a combination of server programs that run in the background, and client programs that are inv