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New CPU model of Linode Fremont

Recently I placed an order of a new VPS at Linode. It has a new CPU type.

Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz, 1 cores

Another VPS I bought with Linode from July 2017, has Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz, 1 cores

Let me check these difference between E5-2697 v4 and E5-2680 v2.

First place I checked is cpu-world.

The Specification

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Waiting for the Ubuntu 18.04 LTS

Based on the schedule of release, Ubuntu 18.04 LTS (Bionic Beaver) will be released on April 26, 2018, the day after tomorrow.

Now, my all VPS is running on the Ubuntu 16.04 LTS. LTS is an abbreviation for “Long Term Support”.  An LTS version is released every two years. So after Ubuntu 16.04 LTS, it is Ubuntu 18.04 LTS.  Now all LTS version has five years support.

I can use Ubuntu 16.04 LTS until 2021. Security updates will be released during the time period.

I am waiting for the release of Ubuntu 18.04 LTS. I would like to try it on my staging server, or a virtual machine. Try all my existing web programs on Ubuntu 18.04 LTS. Find the compatible problems then fix them.

Maybe after a few months testing. I am sure there are no issues with it. I will install a new VPS with Ubuntu 18.04 LTS and move the websites to it.

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Upgrade to Calibre 3.0

It is a big upgrade. New version serials, starting 3.x.

Calibre 3.0 is released on June 16, 2017. Calibre 2.x is starting almost two years ago.

What is New in Calibre 3.0?

  • The new Content server
    • You can start the Content server by clicking the Connect/share button in calibre. Then just open up a browser and type http://localhost:8080 in the address bar. You will see a list of calibre libraries. Click on one and browse the books. Click on a book and you will have the option to read or download it.
  • Support for High Resolution (Retina) screens
  • Support for icon themes and a new default icon set
  • Conversion to Microsoft Word (DOCX)
  • Backwards incompatibilities

 

 

Here is the list of new features for Calibre 3.0:

  • For details on the major changes in calibre between 2.0 and 3.0, see https://calibre-ebook.com/new-in/twelve
  • A completely re-written Content server with support for reading books in-browser on your phone/tablet. Also works in offline mode.
  • Support for high resolution (Retina screens)
  • A new splash screen to celebrate the release of calibre 3
  • Minor tweaking of the main user interface to emphasize the core features

 

Download 64bit Windows version Calibre here https://calibre-ebook.com/download_windows64

CloudatCost VPS – an VPS service provider from Canada

I am customer of CloudatCost, which is a VPS service provider at Ontario, Canada.

I saw the Ads on twitter, or just someone make a tweet. The most interesting thing is the one time payment and no more recurring invoice. Only one time setup fee.  It also has monthly plan.

For example, the very basic plan, Developer 1, $1/month or $35/one time.

If subscribe the monthly plan, it will be $1/month, after a year, you paid $12.  One time fee $35 is about three year subscription fee. So pay three year service in the front. That’s it. You own the plan for ever.

cloudatcost-plans

I purchased plan Developer 2, by one time fee.

Developer 2:

  • $10/month or $70/one time
  • 2 Xeon vCPU
  • 1 public IP
  • 1GB ECC RAM
  • 20GB SSD
  • 100Mbit Network
  • 1TB monthly transfer

 

I have a coupon for 50% off, that means you just need to pay $35/one time fee, you can have it for ever. See the coupon code :

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Switch to bzip2 compression on my server backup scripts

Previously I used gzip as compression tool to compress the web site files and mysql database.  It is still working on my Linode server. I learned something from the compairasion from this post .

So I tried to use bzip instead of gzip on my backup script.

Here is two examples.

1) Mysqldump file, which is a text sql file.

The original sql file is 52,317KB

  • gzip with level 9 (best) compression:  23,227KB  – Compress Ratio 44.39%
  • bzip2 with default (I think it is level 9) compression: 19,666KB – Compress Ratio 37.59%

Bzip2 is smaller than gzip file. It reduced about 15%.

2) Website files, including php, jpeg, png, css, any files used in web site.

The original tar gile is 187,670KB

  • gzip compression: 42,101KB – Ratio 22.43%
  • bzip2 compression: 34,753KB – Ratio 18.51%

Bzip2 is better. Backup file size is reduced by about 17%.

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A new VPS service provider – Vultr

I  just ordered a new VPS from Vultr.com.

It has All SSD. Maybe the lowest price per memory. Pay $0.007/hr, you get 768MB RAM, 3GHz CPU and 15GB storage. It is about $5/month.

And more datacenters than other VPS service providers. There are 14 locations worldwide, right now.

I did following test though Benchmark Serverbear.

The simply results as below.

UnixBench score: 2242.1

I/O rate: 409.0 MB/second

Bandwidth rate: 97.4 MB/secon

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Ubuntu 14.10 and phpBB 3.1.0 released

Ubuntu is always a good desktop Linux distributation in the world. In the past years. more and more are installed as servers. Now I have four VPS are running under ubuntu, from 12.04 to 14.04.

Ubuntu 14.10 server is not a LTS edition. It will be supported in 9 months. Actually it will be upgrade to new version in 6 months.

ubuntu1410

Download Ubuntu 14.10 server here.

There is also a web forum programe has a new release. It is phpBB 3.1.0. The previous version of phpBB is 3.0.12, released on Sep 28, 2013, more than one year ago.

So I will take a trial installation on the new Ubuntu 14.10 Server. It is cool to have a test run on both new software.

phpbb310

 

Linode VPS connection issue

Today, my VPS at Linode has problem. It can not connected for 3 hours. Later, I got a email from Linode, which displayed that my VPS restarted.

Newark Connectivity Issues

Sunday, April 13, 2014

3:05AM EDT (UTC -4): Many Linodes are booted at this time and we are working with the remaining hosts to fully restore services. We apologize for any inconvenience caused by this event.

1:56AM EDT (UTC -4): Some Linodes have been booted at this time however, we are still working on bringing all Linodes to a running state. We will continue to keep you updated as we have further information.

1:09AM EDT (UTC -4): The Newark datacenter has suffered from a power outage. We are working on bringing Linodes back up as soon as possible.

12:40AM EDT (UTC -4): We are still working with the Newark datacenter to resolve this issue. We apologize for any inconvenience caused.

Saturday, April 12, 2014

11:51PM EDT (UTC -4): We are investigating an issue with connectivity within the Newark datacenter at this time. We will post updates as we have them. We apologize for any inconvenience.

 

linode-down

How to enable SSH server in DD-WRT router

The router is Buffalo WZR-HP-G300NH2, flashed with DD-WRT v24-sp2 build 21676.

The SSH server settings is under Tab Services, Services.

dd-wrt-sshd-1

The section is called Secure Shell

dd-wrt-sshd-2

Select Enable for SSHd, keep the others as is. Then click Save and Apply Settings.

After that, you can use Putty to ssh to router. Let us have a look at my router.

dd-wrt-ssh-box

The login user name is root, not the one for web ui.

Password is the one to sign in web ui.

Varnish Cache built-in tools

When I start to use Varnish for my server, it is hard to start a new vcl. Most of vcl copy on internet make my Varnish failed to start.

Later I know there is a tool to test the VCL file. Make sure it is legal, or validated.

varnishd -C -f /path/to/mysetup.vcl

If something wrong, it will show the error. Point out the place of error.

[root@vps varnish]# varnishd -C -f ./test.vcl
Message from VCC-compiler:
Expected an action, 'if', '{' or '}'
(input Line 18 Pos 9)
ban("req.url ~ ^" + req.url + "$ && req.http.host == " + req.http.host);
--------###---------------------------------------------------------------------
Running VCC-compiler failed, exit 1[root@vps varnish]#

So I can modify it and try it again, until it is pass the validation.

 

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