Adventures & experiences in contemporary technology
This may seem esoteric for some but I like to be in control of the technology that I use. So, when Automattic included post revision retention to WordPress 2.6, I had my reservations about how much it would clutter my database with things that I didn’t need. Thankfully, there is a way to control the feature, but you won’t find the option in the administration screens (they seem to view this as an advanced setting and so don’t want to be adding clutter to the interface for the sake of something that only a few might ever use); you have to edit wp-config.php yourself to add it. Here are the lines that can be added and the effects that they have:
Code: define('WP_POST_REVISIONS','0');
Effect: turns off post revision retention
Code: define('WP_POST_REVISIONS','-1');
Effect: turns it on (the default setting)
Code: define('WP_POST_REVISIONS','2');
Effect: only retains two previous versions of a post (the number can be whatever you want so long as it’s an integer with a value more than zero).
Update (2008-07-23):
There is now a plugin from Dion Hulse that does the above for you and more.
The final release of the next version of WordPress is due out on Monday and, because there are sure to be security fixes included, I have been giving the release candidate a go on my offline blogs. 2.3 is another major release so I have been doing some preparation. In fact, WordPress have a blog entry dedicated to such things for this release. Thankfully, I think that my hillwalking blog should emerge unscathed by this upgrade; I still need to have a go with an offline version of this blog.
The special feature in the new release is tagging and it is good to see that it has had no impact on legacy set ups. I had the same reservations about 2.2 with its inclusion of sidebar widgets but the backward compatibility was enough to see me through without any hiccups. Tagging is not something that I see myself using with categories fulfilling much the same type of role; I am unconvinced by the idea of tag clouds, the type of thing that it powers. However, there are some useful extras here and the filtering of posts by edit status is one of these. Having pending review as a publishing status sounds like a tweak that I might use to allow myself a cooling off period before I publish a post for all of the world to see. Revisiting something with a fresher pair of eyes might stop typographical howlers from emerging into public view…
Update: Another 2.3 feature discovered! I have picked up on multiple category widgets by virtue of the fact that category styling disappeared with the upgrade of the offline version of this blog to 2.3 RC1. Adding "-1" to the relevant CSS class definitions soon sorted things out. It does support the idea of testing before implementation even if no other unexpected changes were spotted. I still am not sure why anyone would have multiple category listings, though.
While I lived in Edinburgh, I largely stuck with local PC part resellers such as Ideal Computing or Silicon Group for my PC building needs. Since all my purchases had to be paid for in cash due to my not having credit or debit cards in those days before the credit splurge that caused subsequent economic problems, that was just as well and was sufficient for my needs. Luckily, they were simpler at the time.
My move south to Macclesfield meant that the counterparts to those stores that I frequented in Edinburgh were not the same. Nevertheless, I found one in Stockport and another in Heaton Chapel that gave me the service that I needed for as long as they lasted. The first was away from Stockport’s shopping precinct and supplied me with a full tower case and an AMD CPU before it closed. The second was part of the now defunct MicroDirect and was conveniently near a train station, so a PC case, motherboard, USB drive housing and WD 500 GB hard drive all came from there before financial trouble struck during the Great Recession. Restructuring allowed the Manchester store to stay open before it, too, shut its doors during 2014, taking the website operation with it. If I find a replacement for either of these, I might be tempted to give it a try.
Another thing that moving from Edinburgh brought my way was working for a living so I now could get debit and credit cards when I could not before then. That meant that online shopping became more of a possibility. As ever, delivery arrangements are not the most convenient with the need for traipsing around the country to courier depots and I don’t fancy annoying neighbours with my deliveries either. However, my current job allows for working from home and this does help, but the sight of Saturday and evening delivery still retains its attraction even if this is a more expensive option.
Over 20 years of making purchases does have you encountering a few computer equipment resellers and many of those companies listed below have seen some business from me from time to time. My being easy to please may mean that I rarely have cause for complaint with any of the ones with which I have had dealings apart from delivery inconveniences. The list should be a living one and economic conditions have taken their toll and may do so again. That will mean changes over time so we’ll need to see how suppliers fare.
This surely has to be a strange entry to have at the top of this list yet they seem to have a greater range of laptop computers than Currys! My HP Pavilion dm4 came from one of their stores and it has been a successful purchase too. Otherwise, various items such as mobile broadband modems and even an external Seagate 2 TB hard drive have been acquired from them. When it comes to computing hardware, it seems that all that’s missing are PC components such as internal hard drives. It’s amazing how mainstream computing has become these days.
This West Midlands only recently came to my attention due to their Cube PC’s. There is a wider range of computer goods that include desktop machines from other manufacturers and the range of laptops is extensive, yet their range also includes TV and audio devices as well. The company has been around since 1996, so there is a track record too.
It seems that PC Pro readers like this Yorkshire company a lot and I once had a colleague at work who swore by them too. There was a time when I ordered an AMD Athlon CPU from them and needed to return it when it didn’t work as I had hoped. Then, the service was what more should emulate an efficient order fulfilment has continued into recent times too. More recent items have included a 2 GB Western Digital hard disk and a Zalman ZM450-GS 450W power supply. Each did what was expected of them so I have no complaints.
PC World was a pervasive name for so long until the holding company consolidated everything under the Currys name in much of the UK away from airports. The list of what I have purchased from their stores in Edinburgh, Stockport, Manchester and now Macclesfield over the decades rather shocks me. Thinking about now, items bought there have included a Toshiba laptop bought in a January sale, an Epson printer and a now retired Canon scanner. Evening opening has ensured that an actual store can become a source of emergency purchases for those who need to be at a workplace during the working day and that’s how it has been for me on a number of occasions like when a power supply has failed.
It was September 1997 when I made my first purchase from this long-established reseller. That was 16 MB of RAM for a Dell XPS 133 and it was not the last item that has come from them either. The attraction then was the ability to pay by cheque for any goods obtained by mail order and I think that DABS must have offered a similar arrangement since I ordered PC parts from them too. In those days, I was without a credit or debit card, so internet shopping was not so convenient and that trend has intensified since then.
More recently, one of my reasons for turning to them has been to get tested and pre-assembled bundles for system upgrades. One was a Gigabyte Z87-HD3 motherboard that came with an Intel Core i5 4670K CPU and 8 GB of DDR3 1600 MHz RAM installed on it and the whole unit tested. It worked without any problems at all and that is more than can be said for some of the system upgrades that I have tried: 2001 was blighted by a destructive ASUS motherboard that wrecked AMD Athlon CPU’s and an IBM Deskstar hard drive; 2009 was disrupted by a dead Gigabyte mainboard before I turned to a bare-bones system from Novatech. That whole unit appeared to have been sourced from Foxconn and had one of their A6VMX motherboards along with an AMD Athlon X2 7820 dual-core processor and 2 GB of DDR2 400 MHz RAM. More memory was added to get 4 GB in there and hard drives and a DVD writer were installed to gain a working main PC after a few months of making do with other machines. My backup machine not has a Gigabyte H81 mainboard with an Intel Core i5 4570 CPU and 8 GB of RAM, which came as a pre-tested bundle and also worked without a problem.
There was a time when I needed to test out Novatech’s returns policy too with an order for what proved to be incompatible memory and they did the needful worked without any problem too. Other more mundane purchases have included 2 GB and 8 GB USB drives and there was nothing amiss with those. All in all, I’d continue to give Novatech some custom.
As the name suggests, these are people who are concerned with providing quieter PC hardware and that includes components as well as whole PC’s too.
In photography, some developments are passing fads while others bring longer lasting changes. In their own way, special effects filters and high dynamic range techniques cause their share of excitement before that passed and their usage became more sensible. In fact, the same might be said for most forms of image processing because tastefulness eventually gets things in order. Equally, there are others that mark bigger shifts.
The biggest example of the latter is the move away from film photography to digital image capture. There still are film photographers but they largely depend on older cameras since very few are made any more. My own transition came later than others but I hardly use film any more and a lack of replacement parts for cameras that are more than fifteen years old only helps to keep things that way. Another truth is that digital photography makes me look at my images more critically and that helps for some continued improvement.
Also, mobile phone cameras have become so capable that the compact camera market has shrunk dramatically. In fact, I gave away my Canon PowerShot G11 earlier this year because there was little justification in hanging onto it. After all, it dated back to 2010 and a phone would do now what it once did though the G11 did more for me than I might have expected. Until 2017, my only photos of Swedish locations were made with that camera. If I ever was emotional at its departure and I doubt that I was, that is not felt now.
If you read photography magazines, you get the sense that mirrorless cameras have captured a lot of the limelight and that especially is the case with the introduction of full frame models. Some writers even are writing off the chances of SLR’s remaining in production though available model ranges remain extensive in spite of the new interlopers. Whatever about the departure of film, the possible loss of SLR’s with their bright optical viewfinders (OVF’s) does make me a little emotional since they were the cameras that so many like me aspired to owning during my younger years and the type has served me well over the decades.
Even so, I too have used mirrorless cameras and an Olympus PEN E-PL5 came into my possession in 2013. However, I found that using the screen on the back of a camera was not to my liking and the quality of mobile phone cameras is such that I no longer need any added portability. However, it needs to be remembered that using a Tamron 14 to 150 mm zoom lens with the body cannot have helped either. Wishing to sample a counterpart with an electronic view finder, I replaced it with an Olympus OM-D E-M10 Mark III earlier this year and have been getting on fine with that.
The body certainly is a compact one but the handling is very like an SLR and I have turned off the automatic switching between viewfinder and screen since I found it distracting; manually switching between the two is my preference. As it happens, using the EVF took a little acclimatisation but being able to add a spirit level overlay proved to as useful as it was instructive. The resulting images may be strong in the green and blue ends of the visible spectrum but that suits a user that is partial to both colours anyway. It also helps that the 16.1 megapixel sensor creates compact images that are quick to upload to a backup service. There have been no issues working with my Tamron lens and keeping that was a deciding factor in my remaining with Olympus in spite of a shutter failure with the older camera. That was fixed efficiently and at a reasonable cost too.
As good as the new Olympus has been, it has not displaced my existing Canon EOS 5D Mark II and Pentax K5 II SLR’s. The frame size is much smaller anyway and January saw me acquire a new Sigma 24 to 105 mm zoom lens for the former after an older lens developed an irreparable fault. The new lens is working as expected and the sharpness of any resulting images is impressive. However, the full frame combination is weighty even if I do use it handheld so that means that the Pentax remains my choice for overseas trips. There also is an added brightness in the viewfinders of both cameras that I appreciate so the OM-D complements the others rather than replacing them.
While I can get on with EVF’s if SLR’s ever get totally superseded, I am planning to stick mainly with SLR’s for now. Interestingly, Canon has launched a new enthusiast model so there must be some continuing interest in them. Also, it seems that Canon foresees a hybrid approach where live viewing using the screen on the back of the camera may add faster autofocus or other kinds of functionality while the OVF allows more traditional working. That of itself makes me wonder if we might see cameras that can switch between EVF and OVF modes within the same viewfinder. The thought may be as far fetched as it is intriguing yet there may be other possibilities that have not been foreseen. One thing is clear though: we are in an age of accelerating change.
Steve Jobs recently surprised an audience at Apple’s Worldwide Developer’s Conference with the announcement that the Safari web browser is being made available for Windows. While everyone else is awaiting Apple’s forthcoming iPhone, the Safari announcement is a more important one to me; not being big on phones, I will let the iPhone excitement pass me by. Without either buying a Mac or running OS X in a virtual machine, there was no other way for me to test my web pages in Safari bar looking for a rendering site on the web. Now, that has all changed and I have downloaded the beta to have a look; it should iron out any rough edges that Mac users have been seeing.
Update: Safari seems to have got a mixed reaction from Windows users; some have tried it with Vista and cited issues. Another gripe has been its memory footprint but I have seen Firefox take up 100 MB.
There are a number of ways of finding out the number of observations (also known as records or rows) in a SAS data set and, while they are documented in a number of different places, I have decided to collect them together in one place. At the very least, it means that I can find them again.
First up is the most basic and least efficient method: read the whole data set and increment a counter to pick up its last value. The END option allows you to find the last value of count without recourse to FIRST.x/LAST.x logic.
data _null_;
set test end=eof;
count+1;
if eof then call symput(”nobs”,count);
run;
The next option is a more succinct SQL variation on the same idea. The colon prefix denotes a macro variable whose value is to be assigned in the SELECT statement; there should be no surprise as to what the COUNT(*) does…
proc sql noprint;
select count(*) into :nobs from test;
quit;
Continuing the SQL theme, accessing the dictionary tables is another route to the same end and has the advantage of needing to access the actual data set in question. You may have an efficiency saving when you are testing large datasets, but you are still reading some data here.
proc sql noprint;
select nobs into :nobs from dictionary.tables where libname=”WORK” and memname=”TEST”;
quit;
The most efficient way to do the trick is just to access the data set header. Here’s the data step way to do it:
data _null_;
if 0 then set test nobs=nobs;
call symputx(”nobs”,nobs);
stop;
run;
The IF/STOP logic stops the data set read in its tracks so that only the header is accessed, saving the time otherwise used to read the data from the data set. Using the SYMPUTX routine avoids the need to explicitly code a numeric to character transformation; it’s a SAS 9 feature, though.
I’ll finish with the most succinct and efficient way of all: the use of macro and SCL functions. It’s my preferred option, and you don’t need a SAS/AF licence to do it, either.
%let dsid=%sysfunc(open(work.test,in));
%let nobs=%sysfunc(attrn(&dsid,nobs));
%if &dsid > 0 %then %let rc=%sysfunc(close(&dsid));
The first line opens the data set, and the last one closes it; this is needed because you are not using data step or SCL and could leave a data set open, causing problems later. The second line is what captures the number of observations from the header of the data set using the SCL ATTRN function called by %SYSFUNC.
There are times when I just need to share some links outside the fleeting environment of Twitter, and this is where they might appear. The practice is very much in the spirit of the original weblog idea when it was about link sharing and not about writing down one’s thoughts as it subsequently became before sharing of photos, videos and other multimedia content became a mainstay of (legal) sharing for some people.
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Whitelist an IP using WAF -- ModSecurity Whitelisting IP addresses
10:59 September 25, 2021
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Integrating AbuseIPDB with Fail2Ban -- Automatically Report Bad IPs
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How to backup and load Cron Jobs from a File in Linux and UNIX? Crontab Command Example
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Webmin: One big drawback to using this data centre management tool
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How to prevent the “are you sure you want to leave this page?” prompt on Facebook?
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Extending a Logical Volume on a Linux Virtual, Cloud or CloudNX server
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How to enable AMD Virtualization on the Aorus X570 Motherboard
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How to install Windows 11 Insider preview on unsupported devices
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dbxcli: A command line tool for Dropbox users and team admins
09:00 May 27, 2021
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How to stop loading Microsoft Edge processes at startup on Windows 10
13:50 May 16, 2021
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Connecting to Microsoft Exchange Calendar from Mozilla Thunderbird
13:03 January 27, 2021
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Using mod_security2 with WordPress
WordPress – Mod_security problems with posts and comments fixed
17:59 December 14, 2020
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20:54 December 6, 2020
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14:51 November 23, 2020
How to force your computer to download the Windows 10 May 2020 Update
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16:00 November 10, 2020
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09:27 October 19, 2020
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13:36 October 10, 2020
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Everything you need to know about DNS -- Plus a list of free public DNS servers
12:27 September 18, 2020
Securing DNS across all of my devices with Pi-Hole + DNS-over-HTTPS + 1.1.1.1
10:47 September 18, 2020
16:11 September 17, 2020
17:04 September 11, 2020
Improve Firefox Performance on Linux by Turning WebRender On
16:46 September 9, 2020
How to Embed an External RSS Feed in WordPress Posts via Shortcode
13:43 July 31, 2020
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09:33 June 16, 2020
Linux Mint 20 Blocks Snap App Installs, So Here’s the Workaround
09:30 June 16, 2020
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13:48 March 8, 2020
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Change User’s MySQL Password | Reset MySQL Root Password Guide
12:38 February 19, 2020
09:35 February 17, 2020
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13:14 February 16, 2020
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20:34 February 15, 2020
14:29 February 14, 2020
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How to move docker data directory to another location on Ubuntu
09:45 February 14, 2020
The Complete Guide to “useradd” Command in Linux – 15 Practical Examples
09:43 February 14, 2020
09:42 February 14, 2020
20:30 February 12, 2020
How to Optimize and Compress JPEG or PNG Images in Linux Command Line
17:41 January 29, 2020
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18:37 January 17, 2020
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12:43 January 17, 2020
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12:41 January 17, 2020
21:01 January 16, 2020
20:59 January 16, 2020
At the time of writing, this website uses an older version of TLS so you may see browser messages on visiting it. Hopefully, that will get sorted since it looks out for a security tool website.
20:57 January 16, 2020
12:19 January 15, 2020
12:17 January 15, 2020
The most important steps to take to make an Apache server more secure
12:17 January 15, 2020
How to Implement Security HTTP Headers to Prevent Vulnerabilities?
12:16 January 15, 2020
21:38 December 31, 2019
21:37 December 31, 2019
14:41 December 24, 2019
14:24 December 24, 2019
How To Protect an Apache Server with Fail2Ban on Ubuntu 14.04
This may refer to an older Ubuntu version but the advice contained in the article remains relevant to current ones. In fact, I have used it to harden some VPS systems that I have. Now, I only need to see what impact this action might have.
13:12 December 23, 2019
16:47 December 6, 2019
16:01 November 26, 2019
21:28 November 7, 2019
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12:51 August 31, 2019
22:09 July 6, 2019
14:16 June 11, 2019
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10:55 June 8, 2019
How to disable Sign-in screen acrylic (blur) background on Windows 10 May 2019 Update
11:47 May 22, 2019
11:39 January 30, 2019
Psensor – A Graphical Hardware Temperature Monitoring Tool for Linux
13:34 January 29, 2019
20:03 December 8, 2018
How to commit changes to a docker image
Five Ways to Slim Your Docker Images
09:59 December 8, 2018
09:58 December 8, 2018
14:04 December 6, 2018
15:53 December 5, 2018
Show the slide number and total number of slides on every PowerPoint slide
21:28 December 4, 2018
19:53 December 4, 2018
18:03 November 26, 2018
Configure Postfix to Send Mail Using Gmail and Google Apps on Debian or Ubuntu
18:02 November 26, 2018
Configure Postfix to Send Mail Using an External SMTP Server
18:01 November 26, 2018
18:01 November 26, 2018
18:00 November 26, 2018
11:09 November 26, 2018
11:07 November 26, 2018
How to Setup a Complete Mail Server (Postfix) using ‘SquirrelMail’ (Webmail) on Ubuntu/Debian
14:51 November 25, 2018
11:43 November 25, 2018
How to Configure WordPress to Use SMTP For Sending Emails Tutorial
11:42 November 25, 2018
11:41 November 25, 2018
11:41 November 25, 2018
11:39 November 25, 2018
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10:51 November 25, 2018
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20:30 November 24, 2018
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Redirecting HTTP to HTTPS Using .htaccess File: Step by Step
21:45 November 22, 2018
21:43 November 22, 2018
12:10 November 17, 2018
12:08 November 17, 2018
apt-get install linux-image-extra getting “W: mdadm: /etc/mdadm/mdadm.conf defines no arrays.”
12:04 November 17, 2018
15:40 November 4, 2018
Here are the 13 most useful Mac shortcuts that will help you do everything faster
11:02 October 21, 2018
09:05 October 13, 2018
11:48 September 22, 2018
16:12 September 20, 2018
Use an Easy PowerShell Command to Search Files for Information
12:20 September 19, 2018
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21:18 August 5, 2018
13:42 July 22, 2018
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Performance optimizations you can apply today to load the Matomo JavaScript tracker faster
16:01 May 25, 2018
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11:24 May 16, 2018
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11:02 May 12, 2018
10:59 May 12, 2018
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10:27 May 12, 2018
21:42 May 5, 2018
12:23 April 18, 2018
How to troubleshoot the error code “SEC_ERROR_UNKNOWN_ISSUER” on secure websites
09:34 April 15, 2018
10:08 April 14, 2018
22:25 April 13, 2018
18:20 April 10, 2018
Write your best resume in Word with help from LinkedIn in Resume Assistant
09:59 March 29, 2018
16:37 March 28, 2018
15:58 March 28, 2018
14:12 March 28, 2018
14:00 March 28, 2018
10:35 March 27, 2018
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13:59 March 17, 2018
11:11 March 17, 2018
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10:17 November 25, 2017
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Diving Into the New Gutenberg WordPress Editor (Pros and Cons)
19:11 November 15, 2017
19:09 November 15, 2017
16:44 October 31, 2017
23:34 October 25, 2017
The care and feeding of software engineers (or, why engineers are grumpy)
23:32 October 25, 2017
23:31 October 25, 2017
19:20 October 24, 2017
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10:19 October 14, 2017
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Get rid of those extra TIFFs & PSDs in your Lightroom Library fast!
11:57 September 15, 2017
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09:45 September 11, 2017
17:11 August 13, 2017
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Windows 7: Windows 7 Not Updating
Windows Update error “0x80070002” or “0x80070003”
Fix Windows Update errors by using the DISM or System Update Readiness tool
18:17 March 22, 2017
23:25 March 12, 2017
22:08 March 7, 2017
Review: Evoluent Vertical Mouse 4 (and how to make it work in Ubuntu)
11:14 February 25, 2017
18:38 February 16, 2017
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10:35 February 5, 2017
00:45 December 3, 2016
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Get rid of the annoying formatting pop-up when you paste in Word
11:15 December 5, 2015
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22:16 November 12, 2015
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Fedora 23/22/21 nVidia Drivers Install Guide
09:56 October 30, 2015
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The Command Prompt is Outdated: 2 Command Prompt Replacements for Windows
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07:35 June 23, 2015
20:12 June 18, 2015
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How to fix “System program problem detected” error on Ubuntu
19:27 March 28, 2015
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Google Translate CLI Lets You Translate Text From The Command Line
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Switch Windows by Hovering the Mouse Over a Window in Windows 7 or Vista
10:32 February 4, 2015
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12:56 December 31, 2014
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The crop tool is stuck in a fixed shape. How can I make it work properly?
14:55 November 26, 2014
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How To Install MATE Desktop on Ubuntu 14.04 LTS
Cinnamon 2.4 Debuts With New Features, Here’s How To Install It In Ubuntu
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19:53 November 11, 2014
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Archive area of old releases of Java for those who need them.
My spot of bad luck with Windows in August highlighted the importance of hanging on to serial numbers for software that I had purchased over the internet and downloaded. I could at the ones that I needed but they were retained in a motley mix of text files and emails; one even was rediscovered by pottering back to the website of the purveyor. The security of the installation files themselves was another matter of some concern but I was rather more organised in that regard. Both of these are things that need checking before Windows falls to pieces on you and needs to be reinstalled. Of course, human nature being what it is means that we often end up picking up the pieces after a calamity has struck when a spot of planning would have made things that bit easier.
Linux does make life easier on this front: commercial applications are anything but the dominant force that they are in the world of Windows. That means that serial numbers are few and far between and I only need the one for VMware Workstation. The mention of VMware brings me to my retention of Windows so knowing where serial numbers are located remains a good idea. Even so, I cloned my Windows VM so that any Windows restoration following a destructive crash should be a quicker affair. Now that I am a Linux user, Windows crashes should not encroach as much on my home computing any more and Linux should be more stable anyway…
Could 2011 be remembered as the year when the desktop computing interface got a major overhaul? One part of this, Windows 8, won’t be with us until next year but there has been enough happening so far this year that has resulted in a lot of comment. With many if not all of the changes, it is possible to detect the influence of interfaces used on smartphones. After all, the carryover from Windows Phone 7 to the new Metro interface is unmistakeable.
Two developments in the Linux world have spawned a hell of an amount of comment: Canonical’s decision to develop Unity for Ubuntu and the arrival of GNOME 3. While there have been many complaints about the changes made in both, there must be a fair few folk who are just getting on with using them without complaint. Maybe there are many who even quietly like the new interfaces. While I am not so sure about Unity, I surprised myself by taking to GNOME Shell so much that I installed it on Linux Mint. It remains a work in progress as does Unity but it’ll be very interesting to see it mature. Perhaps a good number of the growing collection of GNOME Shell plugins could make it into the main codebase. If that were to happen, I could see it being welcomed by a good few folk.
There was little doubt that the changes in GNOME 3 looked daunting so Ubuntu’s taking a different approach is understandable until you come to realise how change that involves anyway. With GNOME 3 working so well for me, I feel disinclined to dally very much with Unity at all. In fact, I am writing these words on a Toshiba laptop running UGR, effectively Ubuntu running GNOME 3, and that could become my main home computing operating system in time.
For those who find these changes not to their taste, there are alternatives. Some Linux distributions are sticking with GNOME 2 as long as they can and there apparently has been some mention of a fork to keep a GNOME 2 interface available indefinitely. However, there are other possibilities such as LXDE and XFCE out there too. In fact, until GNOME 3 won me over, LXDE was coming to mind as a place of safety until I learned that Linux Mint was retaining its desktop identity. As always, there’s KDE too but I have never warmed to that for some reason.
The latest version of OS X, Lion, also included some changes inspired by iOS, the operating system that powers both the iPhone and iPad. However, while the current edition of PC Pro highlights some disgruntlement in professional circles regarding Apple’s direction, they do not seem to have aroused the kind of ire that has been abroad in the world of Linux. Is it because Linux users want to feel that they are in charge and that iMac and MacBook users are content to have decisions made for them so long as everything just works? Speaking for myself, the former description seems to fit me though having choices means that I can reject decisions that I do not like so much.
At the time of writing, the release of a developer preview of the next version of Windows has been generating a lot of attention. It also appears that changes are headed for the Windows user too. However, I get the sense that a more conservative interface option will be retained and that could be essential for avoiding the alienation of corporate users. After all, I cannot see the Metro interface gaining much favour in the working environment when so many of us have so much to do. Nevertheless, I plan to get my hands on the developer preview to have a look (the weekend proved too short for this). It will be very interesting to see how the next version of Windows develops and I plan to keep an eye on it as it does so.
It now looks as if many will have their work cut out if they are to avoid where desktop computing interfaces are going. Established paradigms are being questioned, particularly as a result of touch interfaces on smartphones and tablets. Wii and Kinect have involved other ways of interacting with computers too so there’s a lot of mileage in rethinking how we work with computers. So far, I have been able to deal with the changes in the world of Linux but I am left wondering at the changes that Microsoft is making. After Vista, they need to be careful and they know that. Maybe, they’ll be better at getting users through changes in computing interfaces than others but it’ll be very interesting to see what happens. Unlike open source community projects, they have the survival of a massive multinational at stake.
Since I often use the tail command to look at the end of a log file and occasionally in combination with the watch command for constant updates, I got to wondering if the number of lines issued by the tail command could be changed. That is a simple thing to do with the -n switch. All you need is something like the following:
tail -n 20 logfile.log
Here the value of 20 is the number of lines produced when it would be 10 by default, and logfile.log gets replaced by the path and name of what you are examining. One thing to watch is that your terminal emulator can show all the lines being displayed. If you find that you are not seeing all the lines that you expect, then that might be the cause.
While you could find this by looking through the documentation, things do not always register with you during dry reading of something laden with lists of parameters or switches. That is an affliction with tools that do a lot and/or allow a lot of customisation.