pvin’s gists

pvin / gist:51b55937e979ccf09d358d26c88c215d

Created October 19, 2017 10:35

ufw for blocking the ports

	Connect to Server(ssh)
	sudo apt-get install ufw
	sudo ufw allow 80 (port http)
	sudo ufw allow 443 (port https)
	sudo ufw allow 22 (port SSH)
	sudo ufw enable
	sudo ufw reload
	sudo ufw status (will list all open ports)

pvin / ruby Transaction with rollback

Created November 11, 2017 12:46

	begin
	ActiveRecord::Base.transaction do
	User.create(name: 'test')
	Role.create(name:'manager')
	end
	rescue => e
	raise ActiveRecord::Rollback
	end

pvin / gist:86f8cc560d4098adf54482a10ea7c798

Last active December 3, 2017 12:28

How to run the rails 5 application in production mode?

	Change in config/environments/production.rb
	config.assets.compile = true

	Change in config/initializers/devise.rb
	config.secret_key = '34790ca67ba55291b876053e2de5a248059345fd3994ada01bc4f16a4b272dedcffdee6c71f9a4b3a92773462686c9ee4a0753b02efcc26d14e6ee11cb9fc9c6'

	Change in config/secrets.yml
	secret_key_base: 32790ca67ba55234b876053e2de5a248059345fd3994ada01bc4f16a4b272dedcffdee6c71f9a4b3a92773462686c9ee4a0753b02efcc26d14e6ee11cb9fc9c6

	Configure database.yml with production env

pvin / gist:4ff1a64da96852683c6541daf8c45bd5

Created December 7, 2017 16:04

Backup and Restore a database of mssql

	sqlcmd -S localhost -U SA -Q "BACKUP DATABASE web_ilids_development TO DISK = N'/var/opt/mssql/data/web_ilids_development.bak' WITH NOFORMAT, NOINIT, NAME = 'web_ilids_development-full', SKIP, NOREWIND, NOUNLOAD, STATS = 10"

	https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-backup-and-restore-database

	https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-setup-tools#ubuntu

pvin / gist:fb8837ebda96d4b1b7a70e6f045aa010

Created December 16, 2017 14:12

RVM installation

	a. gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
	b. cd /tmp
	c. curl -sSL https://get.rvm.io -o rvm.sh
	d. cat /tmp/rvm.sh \| bash -s stable --rails
	e. source /home/username/.rvm/scripts/rvm

pvin / gist:43f9dc283e04619ddf3d3d446db46e79

Last active December 22, 2017 07:10

base64 Encoding and Decoding for mp4 ruby

	Encoding

	require 'base64'
	data = File.open('/home/name/folder/sample-video.mp4').read
	encoded = Base64.encode64(data)

	Decoding

	File.open("/home/name/received/sample.mp4", "wb") do \|file\|
	file.write(Base64.decode64(encoded))

pvin / gist:4499d9a6c5e879713df985a035f3c6ee

Created January 8, 2018 10:32

mssql command

systemctl status mssql-server

pvin / gist:51af0fdb9a7793faf1a6e82fe1c2f457

Last active January 26, 2018 12:04

rbenv installation

	You first need to uninstall the ruby installed by Ubuntu with something like sudo apt-get remove ruby.

	Then reinstall ruby using rbenv and ruby-build according to their docs:

	cd $HOME
	sudo apt-get update
	sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev

	git clone https://github.com/rbenv/rbenv.git ~/.rbenv
	echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc

pvin / gist:5ab2ee75e70962c562ab244d34693d0f

Created January 26, 2018 08:03

download failed Oracle JDK 7 is NOT installed.

	Error in ubuntu

	HTTP request sent, awaiting response... 302 Moved Temporarily
	Location: http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-x64.tar.gz?AuthParam=1516952596_55b9e59ffae6c3f024085f23ab730ec5 [following]
	--2018-01-26 13:11:17-- http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-x64.tar.gz?AuthParam=1516952596_55b9e59ffae6c3f024085f23ab730ec5
	Connecting to download.oracle.com (download.oracle.com)\|23.40.72.119\|:80... connected.
	HTTP request sent, awaiting response... 404 Not Found
	2018-01-26 13:11:18 ERROR 404: Not Found.

	download failed

pvin / gist:4133f0448ee923fc3a7ecb8fd169479b

Created February 5, 2018 10:38

Docker services

praaveen vr pvin