Tag: ubuntu

How to install Ubiquiti Unifi controller ver 4.6.6 on ubuntu 15.04

How to install Ubiquiti Unifi controller ver 4.6.6 on ubuntu 15.04

With the recent announcement of Ubiquiti’s Unifi AC Wireless Access Points they also released a new version of the Unifi controller software.  Unifi Access Points are provisioned and controlled by a central management software called Unifi. Unifi is available for Windows, Mac, and Linux.

In this tutorial, I will show you how to install Unifi on a ubuntu 15.04 linux server

Scroll down for detailed steps or watch the video tutorial.

If you don’t have a ubuntu machine but want to follow along, download a ready-to-go Ubuntu 15.04 Virtual Machine image from here. This tutorial should also work exactly the same on Ubuntu 14.04. Before we get started, make sure your server has all the latest software updates installed.

Step 1: Add the Unifi repo so that you can install unifi with apt-get

Create /etc/apt/sources.list.d/100-ubnt.list and add the following

Step 2: Import the GPG keys for the new repo

Step 3: Update APT and Install Unifi

Step 4: Confirm that unifi is installed and running

You will see output similar to the following

Step 5: Open your browser to https://:8443/

unifi 4.6.6 setup wizard

Unifi Controller for Linux is now installed

Complete the Unifi Setup Wizard and login to the controller.

unifi 4.6.6 dashboard

References

 

Spin up a ubuntu server in 5 minutes on DigitalOcean.com

Spin up a ubuntu server in 5 minutes on DigitalOcean.com

In this tutorial I’ll show you how to create your very own cloud hosted server on digitalocean.com

DigitalOcean.com is a cloud hosting provider that makes it very simple for anyone to create and run a virtual server connected directly to the internet.  DigitalOcean.com calls these servers Droplets.  They offer a range of operating systems to choose from including Ubuntu, CentOS, Debian, Fedora, CoreOS, and FreeBSD.

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Samsung releases magician command line tool for linux – Samsung SSD drives

Samsung releases magician command line tool for linux – Samsung SSD drives

Magician DC

Magician is Samsung’s disk management and diagnostic software for it’s line of SSD solid-state drives. Magician allows you to benchmark your drive, upgrade firmware, check S.M.A.R.T, configure drive encryption, and over provisioning. Until now, this tool has only been available on Windows PCs, today the linux command line version of Magician is available and supports linux distros RHEL, CentOS, and Ubuntu.

Samsung describes this new tools as follows.

Samsung SSD Magician DC software is designed to help users with easy-to-use disk management and diagnostic features for server and data center usage. This software is only for Samsung SSD products.

Samsung Magician DC Features

  • List – Detect list of attached Samsung SSD Drives in the system
  • Firmware Update – Update the old firmware of the SSD to the new version
  • Erase – Erase data on the SSDby issuing an ATA Format Unit command
  • Overprovision – Resize the user capacity of the SSD
  • TRIM – Issue trim command to the SSD
  • S.M.A.R.T – Display smart information and log temperature of the connected Samsung SSD drive, and estimate the lifetime of Samsung SSD
  • SET MAX – Set the maximum address of the Samsung SSD to change its user capacity
  • Write Cache – Enable/disable the write cache of the Samsung SSD
  • SCT Cache Status – Get SCT write cache state of the disk.
  • Disk Info – Display current overprovisioning value, current set max value, state of write cache etc. of specified Samsung SSD
  • Command History – Display history of the previously executed commands
  • Help – Display the command line options

Understanding SSD Over Provisioning

The most important thing you can do to increase the reliability and performance of an SSD is to over provision some space at the end of the drive. This simple task is often overlooked, ignored, or plain misunderstood. Over Provisioning is leaving raw unpartitioned space at the end of the drive so that the SSD controller can remap data from worn memory cells on the SSD hard drive. Samsung recommends a 10% over provisioning rate so on a 250GB SSD drive you should have 23.85GB of OP space reserved.
Samsung Magician Over Provisioning Screenshot

magician command line usage and switches

See Users Guide link below

Current supported drive models

  • Samsung SSD 845DC PRO
  • Samsung SSD 845DC EVO
  • Samsung SSD 850 PRO
  • Samsung SSD 840 PRO
  • Samsung SSD PM853T *
  • Samsung SSD SM843T *
  • Samsung SSD SV843 *
    (* : Limited support ‟ Cannot update FW)

Reference