Shurn the Awesomer
Setup Zimbra 8.8 on Ubuntu 16.04

Setup Zimbra 8.8 on Ubuntu 16.04

Written on Thu, 12 April 2018

Optional Prerequisite: Install TCP BBR

TCP BBR is designed to counter traffic congestion. If your application frequently suffer from performance due to congestion, try TCP BBR.

Optional Prerequisite: Set up LVM

LVM is an excellent abstraction tool for storage. Highly recommended if you want to expand your storage needs in the future. Check out a related article on setting up infinite storage for web server but ignore the part on web server. Zimbra is commonly install on /opt/ so set the LVM to this folder.

Optional Prerequisite: Set up Swap Partition

Zimbra recommends a minimum of 8GB RAM. However, if you are faced with a situation where you do not have enough RAM and you can't just add more ram easily, you could use swap space partition or file.

Configure hostname

Edit /etc/hosts and add the following line: mail

Change to your ip address and the hostname to your hostname.

Edit /etc/hostname to this:


Reboot your server and test that you see your hostname:

[email protected]:~# hostname -f
[email protected]:~# hostname

Install and Configure BIND DNS

Install bind9

[email protected]:~# apt install bind9 bind9utils

Edit /etc/bind/named.conf.options, uncomment the forwarders, and add DNS server IP:

forwarders {;;

The DNS server is hosted by Google. Choose your own DNS server if you have a preference.

Add the following to /etc/bind/named.conf.local:

zone "" {
type master;
file "/etc/bind/";
zone "" {
type master;
file "/etc/bind/db.0.0.10";
zone "" {
type master;
file "/etc/bind/db.0.0.127";

Change 0.0.10 to the reverse of your first 3 octet of your IP address, and to your top level domain name.

Create /etc/bind/ and add the following:

$TTL 604800
@ IN SOA (
20180217 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800);Negative Cache TTL
@ IN NS mail
IN MX 10 mail
mail IN A

Change the domain and IP address accordingly.

Create /etc/bind/db.0.0.127 and add the following:

@ IN SOA (
2 ; Serial
8H ; Refresh
2H ; Retry
4W ; Expire
1D);Minimum TTL
1 PTR localhost.

Change the domain accordingly

Create /etc/bind/db.0.0.10 and add the following:

@ IN SOA (
1 ; Serial
8H ; Refresh
2H ; Retry
4W ; Expire
1D);Minimum TTL
10 PTR

Change the domain and IP address accordingly.

Restart bind service

[email protected]:~# /etc/init.d/bind9 restart
[ ok ] Restarting bind9 (via systemctl): bind9.service.

Configure static IP address in /etc/network/interfaces:

source /etc/network/interfaces.d/*.cfg
auto eth0
iface eth0 inet static

Change the domain and IP address accordingly.

Edit /etc/resolvconf/resolve.conf.d/base to the following:


CHange the domain and IP address accordingly. Then regenerate resolve.conf with:

[email protected]:~# resolvconf -u

Download and install Zimbra

Disable firewall first:

[email protected]:~# service ufw stop

Download and install the latest stable version of Zimbra. At the time of writing, the latest version is 8.8.8.

[email protected]:~# wget
[email protected]:~# tar xf zcs-8.8.8_GA_2009.UBUNTU16_64.20180322150747.tgz
[email protected]:~# cd zcs-8.8.8_GA_2009.UBUNTU16_64.20180322150747
[email protected]:~# ./

Read the instructions and answer accordingly to your requirements:

Do you agree with the terms of the software license agreement? [N] y
Use Zimbra's package repository [Y] y
Install zimbra-ldap [Y]
Install zimbra-logger [Y] y
Install zimbra-mta [Y] y
Install zimbra-dnscache [Y] n
Install zimbra-snmp [Y] y
Install zimbra-store [Y] y
Install zimbra-apache [Y] y
Install zimbra-spell [Y] y
Install zimbra-memcached [Y] y
Install zimbra-proxy [Y] y
Install zimbra-chat [Y] y
Install zimbra-drive [Y] y
Install zimbra-imapd (BETA - for evaluation only) [N] n
The system will be modified. Continue? [N] y
Change domain name? [Yes] Yes
Create domain: []
Select from menu, or press 'a' to apply config (? - help) a
Save configuration data to a file? [Yes] y
Save config in file: [/opt/zimbra/config.12345]
The system will be modified - continue? [No] y

Note: This is an abstract of the full installation details. You may experience different installation path.
Highly recommended to set the admin password. Notifying zimbra of your installation is entirely optional.

Go to your favourite browser and browse to your domain like :// Take note of the port 7071, which is the administive login. Without it, you will be presented with the mailbox login.

Send and receive a mail and see that it works.

Installing SSL Certificate

Follow the instructions here to install certbot for your system.

Follow the instructions here for the script to automate letsencrypt installation, except the following:

Location of sudoers.conf

On point 4, the configs/sudoers.conf is located at /opt/letsencrypt-zimbra/configs/sudoers.conf. So you should run the command like this:

[email protected]:~# cp /opt/letsencrypt-zimbra/configs/sudoers.conf /etc/sudoers.d/zimbra_certbot

Zimbra restart might fail

The maintainer has taken note that there is a restart issue at the time of this writing. As such, you need to manually restart zimbra with:

[email protected]:~# sudo -Hu zimbra /opt/zimbra/bin/zmcontrol restart

zmlogswatch does not start due to Date::Parse not installed

If zmlogswatch does not start, check /opt/zimbra/log/zmlogswatch.out and see if it reports any error related to Date::Parse and Swatchdog. If it does, you should proceed with the installation. Then attempt to restart zimbra again. Obtain the URL from Swatchdog here.

[email protected]:~# apt install build-essential
[email protected]:~# cpan
cpan[1]> install Date::Parse
cpan[2]> install Time::HiRes
cpan[3]> install Date::Calc
cpan[4]> install Date::Format
cpan[5]> install Date::Manip
cpan[6]> install File::Tail
cpan[7]> install Term::ANSIColor
cpan[8]> exit
[email protected]:~# wget
[email protected]:~# tar -zxvf swatchdog-3.2.4.tar.gz
[email protected]:~# mv swatchdog-3.2.4 swatchdog
[email protected]:~# cd swatchdog
[email protected]:~# perl Makefile.PL
[email protected]:~# make
[email protected]:~# make test
[email protected]:~# make install
[email protected]:~# make realclean
[email protected]:~# sudo -Hu zimbra /opt/zimbra/bin/zmcontrol restart

Renewing SSL Certificate

You may set up cron job to renew the certificate. Edit your cron job file with:

[email protected]:~# crontab -e

Add the following:

12 12 * * * sudo -Hu zimbra /opt/letsencrypt-zimbra/obtain-and-deploy-letsencrypt-cert.shsudo -Hu zimbra /opt/zimbra/bin/zmcontrol restart
Installing Memcache on Ubuntu 16.04 for PHP

Installing Memcache on Ubuntu 16.04 for PHP

Written on Fri, 24 November 2017

Installing Memcache on Ubuntu 16.04 is a breeze. All you need are just the right commands and everything is installed.

apt install memcached php-memcached

After that, you just need to restart apache.

systemctl apache2 restart

That's it. You can verify that memcached is installed and working with phpinfo().

Sonarwhal - The best linting tool, so far

Sonarwhal - The best linting tool, so far

Written on Thu, 23 November 2017

I have been using Sonarwhal to check my website for errors for quite a while. This is quite a useful tool to get your website checked for best practises and errors.

So far, I have managed to clear out many issues raised by the online scanner provided free-of-charge. The downside of the scanner right now, is that I cannot set rules. Like I can't ignore certain domains that are not under my control, thus it reports their errors. The other downside I face is also a timeout between scans. I like to scan each time I make a site modification, which can be seconds apart. You can install this tool on your local premise to overcome these limitations.

Some of the errors and best practises I have done are like HSTS, PWA, and other security headers. It's a good tool to use. Give it a try for free.

My Wedding of a Lifetime

My Wedding of a Lifetime

Written on Thu, 23 November 2017

So you are going to tie your knot with your soulmate. Before you go running to get your wedding planner, would you like to consider planning on your own like I did?

The advantages of a DIY wedding are obvious:
  1. Your costs is significantly lowered. My entire pre-wedding + wedding + honeymoon costs less than S$9000.
  2. You dictate every step of the wedding. I held a Minions theme wedding. I picked my location. I picked my style.
The disadvantages of a DIY wedding are also obvious:
  1. You pretty much do everything on your own. If you mess up, you're on your own.
  2. It can be stressful, given the sheer amount of work required. Give consideration to your wife before making this step.
  3. You might need to pick up some skills to get things done.


There are many considerations for my wedding that may not apply to you.

  1. Traditions that no longer hold meaning is not followed. For me, a lavish 9-course dinner is meaningless other than to please my invitees. This is my wedding, not a dinner treat.
  2. Gifts are not required. Particularly in Singapore culture, where gifts are an unspoken expectation, I made it clear in writing that gifts are not required. You're here to witness me and my spouse's bond together, not to be my sponsor for my wedding+honeymoon. This is not a fund-raising event. Therefore, my heartiest thank you all who gave. Those who didn't, your witness is the most important thing I asked and hoped for.
  3. My in-laws were from overseas, thus, I could do much savings from staying over at my in-laws' place during honeymoon.
  4. My company provided much benefits, thus, I was able to reduce some costs from certain activities.
  5. My solemnisation date and wedding date are on different dates.
  6. I'm a web developer. I could do certain things differently to achieve the same goal.
  7. My wife is good with sewing.
  8. A lot of my friends helped.

Pre-wedding Preparations

Since I do away with a wedding planner, I totally did not spend ~S$2300 just to engage a planner. The good thing about a wedding planner is that they come with a wealth of experience. Knowing potential pitfalls and obstacles can truly be a event-saver. They will take the load of stress from the couple, so that the couple can just focus on getting happily married, with emphasis on happy. The one single thing that annoyed me most was that a wedding planner advising my invitees based on the projected gift values they bring, which goes against my deep-seated belief that my wedding is not a fund-raising event.

The first item in my list of preparation was to choose a restuarant that gave the most value-for-money. I'm not looking for a cheap place to hold my wedding, but instead, I'm interested in making sure my money is well spent. So I chose EatPlayLove cafe. This place provides a full wedding package at a very reasonable price. The package includes a wedding cake, decorations, and backdrop.

Looking for clothes was not so straight forward. We wanted to look our best. Shopping around sure took much effort. In the end, my wife's talent came to great use. She bought very simple clothes and little accessories to sew them on. On top of the savings, we were able to customise the decorations on our clothes. When we did a comparison of equivalent clothes along Bugis, we managed a savings of 30% average. The biggest savings was from Minions Theme clothes. A piece of Minion theme shirt costs about ~S$80, but buying off a simple shirt and Minion artwork costs a mere ~S$20.

What is a wedding without photos to keep as memory. In this category, we made great savings too. There were many photography packages, but most of them start from ~S$1000. But I'm a web developer, and I can design my own photo album. My good friend, Louis, offered to be my photographer for free. We spent an entire Saturday going to Henderson Wave, Resort World Sentosa, and Palawan Beach taking lots of photos with our own basic camera. Other than the mistake of a dirty lens and having inadequate lighting at night, the most of the photos turn out great! Now, even though Louis offered to do this work completely free, I gave a small gift of appreciation and every meal on the day a treat as a thank you. Never take unfair advantage of friendships. After having it specially designed by me into a unique photo album, I got it printed for S$40. I also specially printed specific photos for distribution for ~S$10. I merely spent a bit more than S$100 on this section.

As tradition, every wedding must have a ring. My wife and I agree together that a ring is more symbolic than the weight in resale value. Diamond and Gold have nothing to do with love. Diamond dug out of Earth is dirty, and, in come cases, bloody. Diamond can be made in a lab. So after much consideration, we settle for 2 Swarovski crystal on a silver plated ring, at an affordable of S$168.

Giving my guest for coming to my wedding as a memory is something my wife and I wanted. We wanted something memorable, usable, affordable, and Minion theme. After looking around suppliers and types of items, we find that a luggage tag has the right balance among all the criterias we set out. A gift costs S$225.70 for 70 pieces.

The Big Day

As formalities, I had to ensure my in-laws are in Singapore during the celebrations. The 2-way flight tickets for 2 person was S$505.70, from Jetstar. For accommodation, practicality, affordability, and prestige has to have some balance. My wife and I are also staying there, thus, budget is a little tighter. After a good look around, we find Aliwal Park Hotel to have the right balance. 150 metres from wedding venue, reasonably comfortable stay, convenient travel to bugis for shopping, and an affordable pricing of S$664 for 5 nights.

Being a great host to my in-laws was important. My wife and I brought them to River Safari. The entry was completely free as it was part of my working company benefits. We also visited Madame Tussad's Musuem and Trick-Eye museum. The tickets were purchased online and as a bundle, total costing us S$128.

Bringing 2 families together was an important part of our marriage. I organised a 6 pax international buffet for us. As I hold SPH Rewards Card, I was given a 1-for-1 treat at The Seasonal Taste @ The Westin. It was such a worth it deal, costing only S$310 instead of S$620. The food is simply delicious, although a bit too salty for myself.

We got a friend to be my wife's make up artist. Since we needed the artist for both the Solemnising and the Wedding, it was charged at $180 each. It included an additional accessory of S$10 which my wife gets to own it. I would consider the rate to be at the lower end of the standard. So it's actually very affordable when I compared it to others that went as high as $300 per event and accessories are only for rental.

Of course, the highlight is the wedding itself at EatPlayLove. Every one present for my event was my photographer. I specially set up our website @ for uploading photos. In preparation for big amounts of upload, I signed up Filestack's Starter Plan, which costs about ~S$70 after currency conversion.

Our Honeymoon

A 2-way flight ticket for me and my wife to Myanmar costs S$390. I had the privilege of staying with my in-laws, thus I saved on that, for 4 nights. I got to thank my in-laws for preparing our bed and mosquito nets.

I clearly remember visiting Shwedagon Pagoda. Being a foreigner, I had to pay a small token fee to enter the premise.

I also managed to visit Thabarwa Centre. Seeing the poor and the needy moved my heart to give a small donation to the place.

Overall, I spent S$1000 + my flight tickets over at Myanmar. Most of the items are far more affordable than in Singapore. 4G internet connection is reasonably priced.

Other Expenses

Logistics was certainly a big part of our journey going from place to place. Most of my trips were taken care through Grab. The overall costs of logistics was about ~S$100.

Food for those involved in preparing for our big day was how we express appreciation. This costs about ~S$400.

A token of appreciation goes to our solemniser, Dr Eileen Aw, Justice of the Peace. For her effort to do us such a service, we gave her S$68 as gift of appreciation.

Thank You

Thank you for your presences, gifts, and help, everyone. You have made our important day most memorable. Your help has made everything possible.

Our wedding has been made most meaningful. Our family and friends effort shows that relationship is the most important part of life. No amount of wealth could have bought us something so priceless and precious.

Those who could not have made it, your well wishes are no less equal.

Expense Breakdown

I expect you are waiting for this. Some of the figures are deliberately inaccurate as a range to give respects to the recepient.

  • Solemnizer: $50 - $100
  • Solemnisation Dinner: ~$200
  • Apparels: ~$300
  • Photography DIY: $110
  • Ring: $168
  • Venue + Food:$2500
  • Wedding Cake: $480
  • Door Gift: $225.70
  • Hotel Stay: $664
  • Makeup Artist: $370
  • Family Dinner: $310
  • Madame Tussad: $128
  • Logistics: ~$200
  • Food (Others): ~$400
  • Flight Tickets: $905.56
  • Honeymoon: $1000
  • Total: ~$8000
All the hype about Note 8

All the hype about Note 8

Written on Mon, 11 September 2017

Seems like the world is getting so excited about the new Note 8 from Samsung. There is no shortage of Note 8 reviews. I'm not about to start doing one right now. I'll probably share about me and my wife's experience transiting to the new Note 8.

For me, I've been a long time Android user. Transiting it over from my previous Galaxy S6 Edge is a mere breeze. But my wife has been a long time iPhone 5S user. But you wouldn't believe me when I tell you that she picked up Android really fast. To be fair, she actually used the OPPO R9 model for about a month before she got her hands on Samsung Galaxy Note 8. Using OPPO R9 was already easy enough that when she landed her hands on Note 8, it was just another android to feast her eyes on.

That's her unboxing the phone. You can already tell how excited she is.

From the left, we have Galaxy S6 Edge, Galaxy Note 8, and Oppo R9. Clearly, Note 8 is the tallest of the 3, with R9 coming close.

But when it comes to screen real estate, the Note 8 is clearly the winner.

The data transfer from S6 Edge to Note 8 wasn't as smooth. To be fair, it isn't the fault of Android or Samsung. It's just that the apps ain't designed to transfer well with Smart Switch. The 160+ apps I have to restore through download from Google Play sure took a long time. Eventually, I am still able to smoothly transit to Note 8.

The transition from R9 to Note 8 had an extra hurdle. Smart link won't automatically install on R9. I had to download it from Google Play directly. I suspect it's because it runs on ColorOS, a variant of Android. Other than that, every other procedure is smooth.

If you're on budget, you might want to know that your purchase probably comes with a free phone case.

As expected, you should receive the fast charger. If you're using other phones that supports Qualcomm's Quick Charge, the fast charge should work too.

Now, this is arguably the accessory that stood out most. The ear piece by AKG is absolutely beautiful to listen to. The insulation is very good. I could actually hear more of the audio range than the previous ear piece provided by Samsung. Listening back to my old songs and noticing other instruments that I missed out previously is really eye opening.

I did not get to try out Dex Station much as I did not have a HDMI monitor available at this point of writing. Just one thing I noted, when I attempt to charge my phone with it, it wasn't on fast charge even though the charger supports it. And the phone case I was using interfered with the connection, that it could not fully plug into the Dex Station.

All in all, this is a very good device, as long as it doesn't explode.

Disclaimer: Even though all the photos in this blogpost is shot with Note8, the images have been edited and optimised for web by degrading it slightly, for faster download speeds.

About Me

Greetings Earthlings , Shurn the Awesomer is here to give you an awesome time.

This little site is a record of my life, opinions, and views. I'm mainly writing about Technology & Gadgets, Busting Creationist Myths, and other philosophical stuff.

This site is done using CakePHP.


With this uptime, how much more can I be proud of to showcase to the world? This uptime monitoring is brought to you by StatusCake since 13th May 2017.


I will always check for copyright usage before using any materials on my site. Whenever due, credit shall be given.

However, if you notice that I may have infringed on any copyright material. Please do not hesitate to contact me. All works of every artist deserves to be honoured and respected.