tusharf5

Change SSH Port on Amazon EC2 Instance

1. Launch and connect to EC2 instance running Amazon Linux 2.
2. Promote to root and edit /etc/ssh/sshd_config 
## sudo vi /etc/ssh/sshd_config
3. Edit line 17 (usually 17) #PORT 22. You'll need to un-comment the line and change the port to whatever you like. 
## PORT 9222
4. Save changes and exit
## :wq

tusharf5

// try here http://pdfmake.org/playground.html

var dd = {
  content: [
    {
      columns: [
        {
          image:
            'data:image/png;base64,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

tusharf5

Starter Script or User Data (NGINX as Reverse Proxy for Node.js with PM2) [Amazon Linux 2]

• Install Git
• Install Nginx
• Setup Nginx as a Reverse Proxy for your Node.js Application
• Install Node using NVM
• Install PM2
• Run a Dummy API Server Using express
• Start the Server using PM2
• Auto Start PM2 after a server reboot.

tusharf5

1. go to terminal in your project folder. a. run git config credential.helper store
2. run git pull
3. input your username and password
4. go back to sourceTree and run Fetch or Pull, it does not ask your password again.

OR

You need to update SourceTree config via "Preferences -> Git tab -> Git Version" by select "Use System Git", then everything works well

tusharf5

Reading Big Files in Node.js is a little tricky. Node.js is meant to deal with I/O tasks efficiently and not CPU intensive computations. It is still doable though but I'd prefer doing such tasks in languages like python, R etc. Reading, Parsing, Transforming and then Saving large data sets (I'm talking millions of records here) can be done in a lot of ways but only a few of those are efficient. Following snippet is able to parse millions of records without wasting a lot of CPU (15% - 30% max) and (40 MB - 60 MB max) memory. It is based on Streams.

The following program expects the input to be a csv file source eg. big-data.unpr.csv It saves the result as ndjson and not json as working with huge datasets is easier when done using ndjson format.

tusharf5

/**
 * Retries a promise n no. of times before rejecting.
 */
async function retryPromise(promise, nthTry) {
  try {
    const res = await promise;
    return res;
  } catch (e) {
    if (nthTry === 1) {
      return Promise.reject(e);

tusharf5

#listener {
  width: 45px;
  height: 45px;
  border: 1px solid black;
}

tusharf5

function splitPath(path) {
  const paths = [];

  for (let i = 0; i < path.length; i++) {
    const c = path[i];

    if (c === ']') {
      continue;
    }

tusharf5

export HOME="/Users/<USERNAME>"
export PATH=$HOME/bin:/usr/local/bin:$PATH
export PATH="/opt/local/bin:/opt/local/sbin:$PATH"
export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH"
# Path to your oh-my-zsh installation.
export ZSH="$HOME/.oh-my-zsh"

export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8

tusharf5

.file-node-content {
  padding: 9px 4px;
  margin: 0;
  display: flex;
  align-items: center;
}

.file-tree-node > .file-node-children {
  padding-left: 12px;