I am a CTO with over 5 years of experience in start-up and over 10 years in working at managing position for big companies. I am also a full-stacks developer with over 12 years in system design, product development and technology product deployment.User experience and system security are the things I care about most.

Blog

15 Docker Commands Beginners Should Know

15 Docker Commands Beginners Should Know

  • tran.travis
  • August 14, 2019
  • 4 min read

In this post, basically, I don’t put options. If you think this command is lacking something important, you will need to check Docker Doc (https://docs.docker.com/)

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RSA encryption in Java and JavaScript 2

RSA encryption in Java and JavaScript

  • tran.travis
  • August 13, 2019
  • 4 min read

Using RSA encryption to:

  1. Encrypt plain text in Java and decrypt cypher text in JavaScript.
  2. Encrypt plain text in JavaScript and decrypt cypher text in Java.

Encryption in JavaScript side

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AES encryption in Java and JavaScript for both side transmission

AES encryption in Java and JavaScript

  • tran.travis
  • August 8, 2019
  • 5 min read

In this article, I’m going to discuss about both side AES encryption in Java and JavaScript. It means:

  1. Encrypt plain text in Java and decrypt cypher text in JavaScript.
  2. Encrypt plain text in JavaScript and decrypt cypher text in Java.

JavaScript side

I use library CryptoJS for AES encryption.

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Atlassian Confluence troubleshooting

Atlassian Confluence troubleshooting

  • tran.travis
  • August 8, 2019
  • 5 min read

Language Settings

Administrators can define a default language to be applied to all spaces in your Confluence site. Note that individual users can select a language preference for their session.

Setting the default language

To change the default language for the Confluence site:

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Install WordPress plugins and themes without asking FTP credentials 3

Install WordPress plugins and themes without asking FTP credentials

  • tran.travis
  • August 7, 2019
  • 2 min read

Sau khi cài đặt một bản WordPress mới, bạn sẽ cần cài đặt thêm theme hoặc các plugins hỗ trợ. Những lúc như thế này, đôi khi bạn phát hiện ra rằng WordPress yêu cầu bạn phải upload qua giao thức FTP, với các thông tin xác thực được yêu cầu. WordPress sẽ chỉ yêu […]

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Log Rotation 1

Log Rotation

  • tran.travis
  • July 27, 2019
  • 2 min read

Linux script rollback log by interval.

log-rotation.sh

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Install Gnome 3 GUI on RHEL CentOS 1

Install Gnome 3 GUI on RHEL, CentOS

  • tran.travis
  • July 27, 2019
  • 1 min read

Kiểm tra yum package đã có sẵn gói cài đặt giao diện hay chưa bằng lệnh:

sudo yum group list

Cài đặt gói giao diện:

sudo yum -y groupinstall "GNOME Desktop" "Graphical Administration Tools"
sudo ln -sf /lib/systemd/system/runlevel5.target /etc/systemd/system/default.target

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Open port for SQL Server remote connection 1 1

Open port for SQL Server remote connection

  • tran.travis
  • July 27, 2019
  • 2 min read

Ports and protocols used by Microsoft SQL Server database engine (SQLServer).

About this task

Microsoft SQL Server is a relational database management system (RDBMS) produced by Microsoft. Its primary query language is Transact-SQL, an implementation of the ANSI/ISO standard Structured Query Language (SQL) which is used by Microsoft. You need to allow distant users to connect to the SQL server so they can address it their queries.
SQL Server is used by:

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