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.

Category: System Administration

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nginx temlates

Nginx Templates

  • tran.travis
  • November 26, 2022
  • 3 min read

Nginx Templates: Secure and fastify your nginx setup process with useful features using these templates.

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Two-Way SSL with HAProxy

  • tran.travis
  • February 27, 2021
  • 5 min read

In some situations it is useful to set up your own Certificate Authority (CA) for signing certificates that HAProxy will use for two-way SSL authentication

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Install Windows 10 from a USB Flash Drive

  • tran.travis
  • November 1, 2019
  • 3 min read

I’m writing this because I can, for some reason, never remember how to use Diskpart. And who uses DVD’s anymore? Download the Windows 10 preview ISO from here: http://windows.microsoft.com/en-us/windows/preview Insert a usb drive at least 4gb in size Open a command prompt as administrator Hit Windows Key, type cmd and hit Ctrl+Shift+Enter. This will force it to open as admin. Run diskpart […]

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One-Press VPS Starter script

  • tran.travis
  • August 15, 2019
  • 12 min read

Script tự động thiết lập toàn bộ cấu hình bảo mật cho một VPS mới

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Sử dụng iptables trên CentOS

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

Bài viết này hướng dẫn về cách cài đặt và cấu hình iptables trên CentOS.
Tới thời điểm hiện tại, tuy rằng CentOS 7 sử dụng firewalld làm công cụ thiết lập các chính sách mạng cho server linux, nhưng mình vẫn quen sử dụng iptables hơn.

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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

  • 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

  • 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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