This how-to assumes that:
domain.name. Any reference to domain.name throughout the tutorial therefore, must be replaced with your own domain name. Router - Router is the device at home that connects all devices in your house to the internet.
On my post MySQL function to calculate elapsed working time I was asked in comments if the assumptions can be reversed such that given start date, starting time and closing time of site and the elapsed working hours, function should return the closed date. I was convinced that it will be possible to achieve this with minor tweaks to original logic and so I only concentrated on original code and how to tweak it to achieve the result. It is very likely that there might exist a more elegant solution but frankly I did not have a usecase I did find a usecase afterall - Clue was in redefining the problem description for this. Presented below is the function that with my minimal testing seems to give correct results. Feel free to try it and as always any feedback is welcome. 
Find out the WorkDay date by when a ticket must be closed given:
Assumption
It is assumed that opening and closing times are same on all working days and that all the sites are closed on holidays and weekends.
I have found the recent ghost upgrades quite painless but there have been few hiccups for last two times so I kept a record of what helped and it is as listed below:
General Update should be as simple as:
A friend of mine today had an issue. He had created a template for some really complex calculations and to ensure he does not mess up with the forumlae by mistake he had password protected sheets and cells. He had done this back in 2012 and now he wanted change something in there but he had forgotten the password so he asked me if I can help.
Now, I do not know much about how it could be done on windows or on excel but I knew a small trick on LibreOffice so I asked him to send me that excel file by email. I then took following steps:
Right then, the Ghost V1.0 was out a while back and they made Ghost 0.11.x an LTS so I was not in any rush to upgrade too. I have not had much time to sort this out for a while and two days back when I finally came around to check how to upgrade, my first moment of concern was that officially supported stack is for NGINX.
I have moved my blog to the Apache Stack on DigitalOcean and while on my sandbox environment I still have NGINX, that is not a place I want to host my blog from. Anyhoo, I realised soon enough that while not officially supported it s easy to bypass the restrictions so I went ahead.
The upgrade itself couldn't have been simpler considering the major version bump. The answer to the question 'Was it worth it?' is something we will have to wait and see although I am liking what I see except for the initial hiccups.
Success
EDITED AFTER THE POST: Boy oh boy - just after I finished this post I saw the latest version of Ghost V1.12 is out and it was such a painless process compared to past. Just a simple command 'ghost update' and job done. That itself makes this whole pain kind of worth it.
OK so the steps I took are as presented below.
For a fairly long time, I have been looking for a simple markdown type of solution to be able to quickly draw Gantt charts but never came across what one would call a quick option. It has always been an involved process.
To my simplistic mind, a simple solution would just be an option where I can type the action, a start date and an end date for the action line after line and it get's displayed in the Gantt chart.
I have been with PlusNet for over two years now and am a happy camper as far as fiber optic broadband is concerned but as I am no longer on a broadband contract with PlusNet and had no intention of going on one, so the only way I could get a change to my ageing router was by purchasing a new one.
Hence I started reading about my options and soon enough realised that an old router can be given new lease of life using DD-WRT. Equally soon-ish I also realised that the router from PlusNet - TG582n - is quite rubbish and does not play nice with any of the open source firmwares.
So I figured that if I have to just play around a bit, I might as well start with something cheaper and cheaper is what I found in the TP-Link router TL-WR841n at just £16.00. You can't get any cheaper than that in my opinion. OK, so now that we have established that I am cheap and my new router is cheap, let's move on to interesting stuff.
I had read that TP-Link router and specifically TL-WR841n plays nicely with DD-WRT but it was only after I had my new toy did I realise that these things also come in hardware version and while interwebs is filled with instructions on installing DD-WRT for upto v9, when it comes to v11 in Europe, it can be a bit tricky to proceed. There are some instructions in forums1 but nothing that walks one end to end hence this post.
While renewing my LetsEncrypt certificate, I found myself in a strange situation where the certbot won't run asking me to update pip and then each time I tried updating pip it failed with the error error: command 'x86_64-linux-gnu-gcc' failed with exit status 4.
It turns out that this happens due to low memory and with my digitalocean droplet being the cheapest one this was bound to happen sooner rather than later. Fortunately there is a way around it as explained below.
Use of following commands will ensure that the swap file is created which in turn will help avoid the 'error: command 'x86_64-linux-gnu-gcc' failed with exit status 4'.
Following commands will create a swap file: