• NTP Server (Network Time Protocol)

    NTP Server


    Setting your servers’s clock and timezone properly is essential in ensuring the healthy operation of distrubted systems and maintain accurate log timestamps. This article will show you how to install and configure the NTP time synchronization service on an Red Hat Enterprise Linux 7.2 Server.

  • DNS Server

    DNS Server


    DNS(Domain Name System) is a basic facility in the Internet as well as some intranets.

    This article will show you how to setup and configure the BIND DNS Server. The environment used is Red Hat Enterprise Linux 7. So this article also applies to Fedora and CentOS, meantime the procedure would be look alike on other releases.

  • Securing SSH Server

    Securing SSH


    SSH(Secure Shell) provides a secure way of logging into a remote server. On many relases, the ssh service is ready to use without configuration. But it use a general settings for most circumstances.

    This article introduces some useful tips to securing a ssh service against attacks.

  • System Administration - FreeBSD



    FreeBSD is a high performance operating system that is suitable for a variety of server roles. This article will cover some common system administration tasks with a FreeBSD server.

  • NFS server


    NFS(Network File System) is a distributed filesystem protocol used to provides remote directory access on a server. This helps leveraging storage space in a different location and to write to the same space from multiple clients.

    In this article, we will show how to configure NFS mounts on openSUSE. And the process would keep alike between different releases, such as Ubuntu, RHEL, CentOS, etc.

  • Network Settings


    A basic understanding of networking is important for system admin. Not only is it essential for getting your services online and running smoothly, it also give you the insight to diagnose problems.

    This article will privides an overview of the common network related operations.

    Network Connection

  • NIC eno16777736 problem fix


    NIC under Linux is sometimes mis-named as eno16777736. This article describes why this happend and how to fix it with either udev or ifcfg-conn network configuration scripts.

  • MySQL Primer - Performance

    MySQL Performance Balance


    This article will discus MySQL server performance tuning tips and tricks.

    This article is intend for

    • Application Designer/Developer
    • Database/System Administrator
  • Container


    Container related tech stuff

  • System Administration - macOS


    This article describes system administration tasks focused on macOS.