hungbang

# Non-root account is recommended for this process

# centos-specific prepration
sudo yum -y update && sudo yum -y groupinstall 'Development Tools' && sudo yum -y install curl irb m4 ruby

# Sanitize the environment
PATH=~/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin
unset LD_LIBRARY_PATH PKG_CONFIG_PATH

# install linuxbrew

hungbang

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}'

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

hungbang

// dependencies
var async = require('async');
var AWS = require('aws-sdk');
// Enable ImageMagick integration.
var gm = require('gm').subClass({ imageMagick: true });
var util = require('util');
var pdf2png = require('pdf2png');
pdf2png.ghostscriptPath = "/usr/bin";

// constants

hungbang

Git Best Practices

This is a fairly common question, and there isn't a One True Answer, but still, this represents a consensus from #git

Read about git

Knowing where to look is half the battle. I strongly urge everyone to read (and support) the Pro Git book. The other resources are highly

hungbang

#!/usr/bin/env bash

echo "
----------------------
  MONGODB
----------------------
"

# import mongodb 4.0 public gpg key
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4

hungbang

ArrayList<Integer> array = new ArrayList<>(4);
ArrayList<Integer> input = new ArrayList<>(4);
for(int i=0;i<10;i++){
     array.add(i);
}
        
Collections.shuffle(array);
    
for(int j=0;j<4;j++){
     input.add(array.get(j));

hungbang

Docker - How to cleanup (unused) resources

Cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

hungbang

PSQL CLI Client

Psql is a fully-fledged CLI client for Postgres, but most people are unaware of its many advanced features.

~/.psqlrc can be edited to persist any behavior or configuration settings you want between psql sessions. It behaves just like ~/.bashrc or ~/.vimrc, sourced at psql launch. See More out of psql for some interesting configurations.

If you have a long query to write and rewrite, you can use \e to edit your query in an editor.

Use \watch at the end of a query in order to automatically re-run the query every few seconds - great for monitoring while making changes elsewhere in your application architecture.

hungbang

package com.xxx.common.config;

import com.atomikos.icatch.config.UserTransactionServiceImp;
import com.atomikos.icatch.jta.UserTransactionImp;
import com.atomikos.icatch.jta.UserTransactionManager;
import net.sf.ehcache.transaction.manager.TransactionManagerLookup;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;

hungbang

# ===================================================================
# COMMON SPRING BOOT PROPERTIES
#
# This sample file is provided as a guideline. Do NOT copy it in its
# entirety to your own application.               ^^^
# ===================================================================

# ----------------------------------------
# CORE PROPERTIES
# ----------------------------------------