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sangram desai
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Centos 7 Booting automatically into Graphical mode
Centos 7  installation end up into terminal mode start up ,if no INTERNET connectivity within VM instance. running "dhclient" command resolved this problem for session & i was able to ping google. Now we have to install Gnome as follows         yum groups i...

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REDIS on Debian 9 Installation Notes
To install redis on Debian 9 we need to download source code then we need to compile it by unzipping then running make,make install & finally from util dir run "install_server.sh". Please refer below link for  detail instructions. https://www.digitalocean.c...

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postgresql Cluster
List All Cluster:     root@debian:~# pg_lsclusters     Ver Cluster Port Status Owner    Data directory               Log file     9.6 main    5432 online postgres /var/lib/postgresql/9.6/main     /var/log/postgresql/postgresql-9.6-main.log Find Status of gi...

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Listing all files recursively using bluebird promise
var Promise = require("bluebird"); var fs = Promise.promisifyAll(require('fs')); var Path = require('path'); var dir = '/home/test_user/pictures/sample'; var ext = ['.txt', '.jpg']; let files = []; function walk(dir, ext) {     return fs.readdirAsync(dir).m...

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Listing files & directories in given folder using node.js synchroniously
Here is my code for getting list of directories & sub-directories & files within each of it for given path. var fs = require("fs"); var path = require('path'); var op = new Object(); var basePath = '/home/test_user/pictures/samples/'; function myCb(opt){   ...

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Postgres Cross-Server/Cross-Database Querying
To demonstrate cross database quering we will create two
databases "PlaygroundLive" & "PlaygroundStaging".Both these database can be on same server or different postgresql server.In current case they are on same server. On both databases
create below table ...

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Installing SQL SERVER on Fedora 23
Here are my notes on
installation of MSSQL SERVER on Fedora. First become root     # su - Microsoft sql server
on fedora requires two new YUM repository one for actual sql server
and other for command line tool to query it. Add Microsoft
Software repositor...

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Running Ubuntu headless in Fedora 23 on Docker
First
we will add docker repository for Fedora 23 for that inside
directory /etc/yum.repos.d/  add "docker.repo" file in which add
following content.I use nano a simple command line text editor for it
through root privileges.most of tutorial assumes root pr...

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Linq - Group by into an array
LINQ has lot of capability that we seldom use.For example sometime we need to group a column into a string array or collection of some sort like say list based on another column. Here I will demonstrate same into an array. For purpose of demonstration I wil...
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