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Anand luckydev

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luckydev / gist:f9d28af6ff390d57d582799d2dd73f06
Created May 26, 2021 15:41
Create MongoDB index in background
//query to create an index in background. won't stop current reads/writes on the collection
db.collection.createIndex( { 'key1': 1 }, { background: true } )
//query to create a compount index in background. won't stop current reads/writes on the collection
db.collection.createIndex( { 'key1': 1, 'key2': 1 }, { background: true } )
//to check the progress of indexing operation
db.currentOp(true).inprog.forEach(function(op){ if(op.msg!==undefined) print(op.msg) })
//to kill the indexing operation, just in case.
@luckydev
luckydev / install-codedeploy.sh
Last active January 24, 2019 10:53
Install codedeploy agent in an EC2 instance
#!/bin/bash
sudo apt-get -y install ruby
sudo apt-get -y install wget
# this location varies for every region. replace aws-codedeploy-us-west-1 with name given here https://docs.aws.amazon.com/codedeploy/latest/userguide/resource-kit.html#resource-kit-bucket-names
wget -c https://aws-codedeploy-us-west-1.s3.amazonaws.com/latest/install
chmod +x ./install
sudo ./install auto
@luckydev
luckydev / gist:ed966a7c12fd4b1311c063b77dc81389
Created February 20, 2018 10:00
Reset Google authenticator token (2FA) for a specific openvpn user
SSH Login as openvpnas user
$ ssh openvpnas@<open-vpn-server-ip>
$ cd /usr/local/openvpn_as/scripts/ # Go to OpenVPN AS Scripts directory
$ sudo ./sacli --user USERNAME GoogleAuthRegen # Replace USERNAME with username to get a new Google Authenticator Secret
Source: https://forums.openvpn.net/viewtopic.php?t=15366
@luckydev
luckydev / gist:b2a6ebe793aeacf50ff15331fb3b519d
Last active October 22, 2022 14:03
Increate max no of open files limit in Ubuntu 16.04/18.04 for Nginx
# maximum capability of system
user@ubuntu:~$ cat /proc/sys/fs/file-max
708444
# available limit
user@ubuntu:~$ ulimit -n
1024
# To increase the available limit to say 200000
user@ubuntu:~$ sudo vim /etc/sysctl.conf
@luckydev
luckydev / gist:fa20f717aa677751d0f6
Created June 24, 2015 10:15
add these lines to nginx config
upstream railsapp {
server 0.0.0.0:5000 weight=10 max_fails=5 fail_timeout=30s;
}
server {
listen 80;
server_name admin.com;
location / {
proxy_pass http://railsapp/;
@luckydev
luckydev / the_case_for_go.md
Last active August 29, 2015 14:18
@luckydev
luckydev / about.md
Last active August 29, 2015 14:18 — forked from jasonrudolph/about.md
@luckydev
luckydev / def_method
Last active August 29, 2015 14:02
Define method
class Order
attr_accessor :amount
def amount=(given_amount)
#write your logic here
end
end
order = Order.new
@luckydev
luckydev / comment.java
Created May 11, 2014 06:06
My first pieces of web db code. Without ORM. or ActiveRecord.
public void addAComment(Comment c) throws Exception{
openConnection();
Statement st = connection.createStatement();
String query = "insert into comments (comment,personid,personname,issueid,commenton,companyid) " +
"values('"+c.getComment()+"',"+c.getPersonid()+",'"+c.getPersonname()+"',"+c.getIssueid()+",'"+c.getCommenton()+"',"+c.getCompanyid()+")";
st.execute(query);
System.out.println("====Comment added");
closeConnection();
}
@luckydev
luckydev / Apple Evangelists.txt
Created April 11, 2014 02:11 — forked from eternalstorms/Apple Evangelists.txt
UI- and App Frameworks Evangelist - Jake Behrens, behrens@apple.com, twitter: @Behrens
- What's new in Cocoa
- Accessibility in iOS
- Building User Interfaces for iOS 7
- Getting Started with UIKit Dynamics
- What's new in Cocoa Touch
- What's New With Multitasking
- Best Practices for Cocoa Animation
- Improving Power Efficiency with App Nap
- Introducing Text Kit