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Happy SysAdmin DayGelukkige SysAdmin Dag

Thursday, August 6th, 2015

sysadminIf you’re reading this on the internet, your PC is secure, without a virus and you can check your e-mail every few minutes, your sysadmin has done his job. Together with the rest of the IT department they make sure that everything’s running smoothly. Unfortunately the only time we realise how important their work is when something does NOT work.

Every year on July 31 it’s the annual System Administrator Appreciation Day when system administrators are recognised for the work they do behind the screens to keep companies up and running.

So what does a sysadmin do exactly? According to http://sysadminday.com/ –

System administrators are always on call, whether it’s updating your company’s antivirus software or repairing a corrupt SQL database. Here’s a bunch of other tasks they do:

  • A sysadmin unpacked the server for this website from its box, installed an operating system, patched it for security, made sure the power and air conditioner were working in the server room, monitored it for stability, set up the software, and kept backups in case anything went wrong. .
  • When your network connection is safe, secure, open, and working, you can thank your sysadmin.
  • A sysadmin worries about spam, viruses, spyware, as well as power outages, fires and floods.
  • When the email server goes down at 2 a.m. on a Sunday, your sysadmin is paged, wakes up, and goes to work.
  • A sysadmin plans, worries, hacks, fixes, pushes, advocates, protects and creates good computer networks. Why? To get you your data, help you do your work, and bring the potential of computing ever closer to reality.

So think about those who work behind the scenes once in a while. Not just when the internet or e-mail’s down, but also when you’re able to work seamlessly every day.

Also read 5 ways to ensure a good relationship with your systems administrator.

 

 

sysadmin

As jy hierdie artikel op die internet kan lees, jou rekenaar veilig en sonder `n virus is en jy jou e-pos elke paar minute kan nagaan het jou sysadmin sy werk gedoen. Saam met die res van die IT-afdeling maak sysadmins seker alles verloop vlot. Ongelukkig besef ons eers hoe belangrik hulle rol is as iets skielik NIE werk nie.

Elke jaar op 31 Julie is System Administrator Appreciation Day wanneer stelseladministrateurs erken word vir die werk wat hulle agter die skerms doen om seker te maak maatskappye bly aan die gang.

So wat doen `n stelseladministrateur (sysadmin) Volgens http://sysadminday.com/

Stelseladministrateurs is altyd op roep – of hulle besig is om die maatskappy se antivirus sagteware op te dateer of `n korrupte SQL-databasis reg te maak. Hier is `n paar ander take waarvoor hulle verantwoordelik is: 

  • `n Stelseladministrateur het die bediener vir hierdie webwerf uitgepak, opgestel, `n bedryfstelsel geinstalleer, sekergemaak die krag en lugreëlaar het gewerk in die bedienerkamer, dit gemonitor vir stabiliteit, sagteware opgestel en dit gerugsteun vir ingeval iets verkeerd gaan.
  • Wanneer jou netwerk veilig, sekuur en in `n werkende toestand is, is jou stelseladministrateurs. 
  • `n Stelseladministrateur bekommer hom/haar oor virusse, gemorspos, spyware, sowel as brande en vloede.
  • Wanneer die e-pos bediener afgaan 2 uur op `n Sondagoggend, kry die sysadmin `n boodskap en moet hy dit gaan oplos.
  • `n Stelseladministrateur beplan, kap, beskerm, maak reg en skep goeie rekenaarnetwerke. Hoekom? Sodat jy jou data kan kry, jou werk kan doen en jou rekenaar optimaal kan benut.

Dink dus so af en toe aan diegene agter die skerms – nie net wanneer die internet of e-pos af is nie, maar ook al die kere wat dit soomloos werk. 

Lees ook –  5 ways to ensure a good relationship with your systems administrator.

 

 

#Hashtag#Hutsteken

Friday, July 24th, 2015

hashtagBefore social media a hashtag or the octothorp was only a symbol on a phone button we never used. Those days are long gone.

Today hashtags are part of our daily vocabulary. The Oxford English Dictionary even added it in June 2014.

The hashtag was first brought to Twitter in 2007 by Chris Messina. Before this the hash or pound symbol, had been used in other ways on the web. For example on IRC chat to indicate channel names. Since then its usage has spread much wider.

hashtag
ˈhaʃtaɡ/
noun
1. a word or phrase preceded by a hash sign (#), used on social media sites such as Twitter to
identify messages on a specific topic.
 
Or by Wikipedia’s definition – “… a type of label or metadata tag, used on social network and micro blogging services which makes it easier for users to find messages with a specific theme or content.”
 
Marketing platform Offerpop sums up the history of the hashtag in an easy infographic.
 
When using a # in front of words or phrases, they will automatically be tagged and searchable for users of the social network – a fast and easy way to accumulate everything related to one topic. Hashtags can be added anywhere – in the middle of a sentence, at the start or beginning. They are particularly useful on a social network like Instagram if you are looking for specific photos of an event or travel images of, for example #paris or #worldcup2014.
 
Their main function should be to provide meta data, context or extra information for a tweet, photo or post. By adding a hashtag you will ensure you tweet will be seen. But make sure it adds value to what you have to say.
 
Unfortunately hashtags can easily be misused. Spammers send tweets with popular hashtags even if the tweet has nothing to do with them in order to gain exposure. When hashtags are misused – for example added to gain followers or not adding to the relevant conversation, the users account can be filtered and even suspended.
 
Two #s are considered acceptable per post or tweet, while three are seen as the limit. Anything more will only annoy your followers. In 2013 Jimmy Fallon and Justin Timberlake performed a parody on the sometimes ridiculous usage of hashtags.
 
Since 2010 hashtags have even been used by some television channels for promotion by adding a “branded” # before, during and after an episodes broadcast.  These will typically appear at the bottom of the screen.
 
They are used by social media experts and major companies to gain followers and increase brand recognition. For more information on how to use hashtags optimally, read Rebecca Hiscott’s article on Mashable.
 
Popular websites supporting hashtags:

hashtagVoor sosiale media was `n hutsteken of octothorp die simbool op `n telefoonknopppie wat jy nooit gebruik het nie. Daardie dae is lankal verby. 

Hutstekens (hashtags) is vandag deel van ons woordeskat en is selfs in Junie 2014 opgeneem in die Oxford English Dictionary.

Die hutsteken is vir die eerste keer in Twitter bekend gestel deur Chris Messina.Voorheen is die hutsteken of pond-simbool op verskeie ander maniere op die web gebruik – byvoorbeeld om kanale op IRC (Internet Relay Chat) aan te dui. Sedertdien word dit veel wyer op sosiale netwerke gebruik. 

hashtag
ˈhaʃtaɡ/
noun
1. a word or phrase preceded by a hash sign (#), used on social media sites such as Twitter to
identify messages on a specific topic.
 
Wikipedia definieer dit as `n tipe merker of metadata etiket wat gebruik word op sosiale netwerke of mikro-blogdienste om dit vir gebruikers te vergemaklik om boodskappe oor `n spesifieke onderwerp of met sekere inhoud op te spoor. 
 
Die bemarkingsplatform Offerpop som die geskiedenis van dié simbool goed op in `n eenvoudige diagram.
 
Wanneer jy `n # voor woorde of frases sit, sal hierdie items outomaties gemerk word en soekbaar wees vir gebruikers van die sosiale netwerk – `n vinnige en maklike manier om verwante inligting oor `n onderwerp te versamel. Die # kan enige plek in die inskrywing geplaas word – as deel van `n sin, aan die begin of einde. Dié metode is veral handig by `n sosiale netwerk soos Instagram as jy soek na fotos van `n spesifieke geleentheid of reisfotos, byvoorbeeld #paris of #worldcup2014.
 
Die teken se hooffunksie moet egter wees om metadata, konteks of ekstra inligting vir `n twiet, foto of bloginskrywing te verskaf. Deur `n hutsteken by te voeg, maak jy seker dat jou inskrywing oor `n spesifieke onderwerp gesien word. Maar maak seker dit voeg waarde by.
 
Hutstekens kan maklik misbruik word. Gemorspos-verspreiders stuur twiets met populêre hutstekens bloot om blootstelling te kry – selfs al het dit niks met die boodskap te doen nie. Indien hutstekens misbruik word – byvoorbeeld bloot gebruik word om ondersteuners te kry of niks relevant bydra tot die gesprek nie, kan `n rekening gefilter en selfs opgeskort word. 
 
Twee hutstekens per inskrywing of twiet is aanvaarbaar, terwyl drie die limiet is. Enigiets meer en jy gaan net op jou lesers se senuwees werk. In 2013 het Jimmy Fallon en Justin Timberlake `n skets gedoen oor die soms belaglike gebruik van hutstekens.
 
Sedert 2010 is hutstekens ook gebruik deur televisiekanale vir bemarking. `n Relevante hutsteken word voor, gedurende of na `n episode van `n reeks uitgesaai en verskyn aan die onderkant van die skerm. Dit word gereeld deur sosiale media deskundiges en groot maatskappye ingespan om ondersteuners te kry en handelsmerke te bemark.
 
Vir inligting oor hoe om hutstekens meer effektief te gebruik, lees gerus Rebecca Hiscott se artikel op Mashable.
 
 Populêre webwerwe wat hutstekens ondersteun:

A little bird told meEk het `n voëltjie hoor fluit

Friday, July 24th, 2015

twitter-bird-blue-on-whiteHave you ever heard of Larry the bird?  Yes, the Twitter bird has a name.

We’re all familiar with the online social networking service called Twitter, but do we know more than the fact that it consists of 40 character “tweets”?

Twitter, or twttr as it was known initially was created in March 2006 by Jack Dorsey, Evan Williams, Biz Stone and Noah Glass during a daylong brainstorming session. Dorsey explained the origin of the “Twitter” title as follows:

“…we came across the word ‘twitter’, and it was just perfect. The definition was ‘a short burst of inconsequential information,’ and ‘chirps from birds’. And that’s exactly what the product was.”

“twttr” was used in the beginning since the domain twitter.com wasn’t available immediately. Six months later at Twitters launch, the domain was purchased and the name changed to the one we now use.

Almost ten years later Twitter Inc. is still based in San Francisco and has more than 25 offices around the world with more than 500 million users.

Through the years Twitter developed from being a social tool people use to tweet their experiences and opinions to a useful tool for marketing, education, news, as well as for emergency communication. Twitter fulfilled an important function during the San Francisco earthquakes and Boston marathon bombings. In South Africa Twitter proved useful in updating us on the Cape Town fires and subsequently also assisted with fundraising.

In events such as these Twitter users use a # to group information and make it searchable, for example #capetownfires. As soon as a hashtag’s usage increases and is mentioned at a greater rate, it becomes a “trending topic” and will be visible on the sidebar to all users. These topics show Twitter users the most talked about subjects, whether they are news events or people’s opinions on current topics. (More on the # here)

Colleges and universities also started using Twitter as a communication and learning tool for students. When courses consist of large groups of students, Twitter can be used to facilitate communication between class members.

HOW DOES IT WORK?

Tweets are publicly visible by default, but senders can restrict messages to just their followers. Users can tweet via the Twitter website, compatible external applications (such as for smartphones), or by Short Message Service (SMS) available in certain countries. Retweeting is when a tweet is forwarded via Twitter by users. Both tweets and retweets can be tracked to see which ones are most popular.

Users may subscribe to other users’ tweets – this is known as “following” and subscribers are known as “followers” or “tweeps”. In addition, users can block those who have followed them.

The "@" sign followed by a username is used for mentioning or replying to other users. To repost a message from another Twitter user and share it with one’s own followers, a user can click the retweet button within the Tweet.

You can watch the animated history of Twitter on YouTube.

[SOURCE: www.wikpedia.org]

Het jy al ooit gehoor van “Larry, the bird?”.  Ja, dis reg, selfs die Twitter-voëltjie het `n naam.

twitter-bird-blue-on-white

Ons is waarskynlik bekend met die  aanlyn sosiale netwerk Twitter, maar weet ons meer as dat dit bestaan uit 40-karakter “twiets”?

Twitter, of twttr soos dit aanvanklik bekendgestaan het, is in Maart 2006 geskep deur Jack Dorsey, Evan Williams, Biz Stone en Noah Glass gedurende `n voldag breinstormsessie. Dorsey het die keuse van die naam Twitter as volg beskryf:

“…we came across the word ‘twitter’, and it was just perfect. The definition was ‘a short burst of inconsequential information,’ and ‘chirps from birds’. And that’s exactly what the product was.”

twttr is aanvanklik gebruik aangesien die domein-naam twitter.com nie op daardie stadium beskikbaar was nie. Ses maande later, met Twitter se amptelike bekendstelling, is die naam verander na die een wat ons vandag gebruik.

Amper tien jaar later is Twitter Inc. steeds gebaseer in San Francisco, met meer as 25 kantore regoor die wêreld en 500 miljoen gebruikers. 

Deur die jare het Twitter ontwikkel van `n sosiale hulpmiddel waarmee mense kommentaar lewer oor hul daaglikse doen en late en lug van opinies tot iets wat gebruik word vir bemarking, onderrig en nuus en veral handig is vir noodkommunikasie. Gedurende die San Francisco aardbewings en Boston-marathon bomaanvalle was Twitter die hoof-kommunikasiekanaal vir die vespreiding van inligting. In Suid-Afrika het Twitter sy nut bewys gedurende die brande in Kaapstad en daarna met die insameling van fondse. 

In gevalle soos hierdie gebruik Twitter-gebruikers `n # om inligting oor `n spesifieke onderwerp te groepeer en soekbaar te maak, byvoorbeeld #capetownfires.  Sodra `n spesifieke hutsteken se gebruik toeneem en dit `n tendens word, word dit `n trending topic en word dit vertoon op die sypaneel vir alle gebruikers. Hierdie onderwerpe wys die onderwerpe waaroor daar die meeste gepraat word, hetsy dit nuusgebeure is of persone se opinies oor aktuele gebeure. (Meer oor # hier)

Kolleges en universiteite maak deesdae ook gebruik van Twitter as `n kommunikasie- en leerhulpmiddel vir studente. Wanneer `n kursus bestaan uit `n groot groep studente, kan Twitter ingespan word om gesprekke tussen klaslede te fasiliteer.

HOE WERK DIT?

Twiets is by verstek sigbaar vir almal, maar versenders kan hul boodskappe beperk tot hul ondersteuners. Gebruikers kan twiet op die Twitter webwerf, deur middel van versoenbare eksterne toepassings (byvoorbeeld toepassings vir selfone) of selfs met SMSe in sommige lande. Hertwiet (retweeting) is wanneer `n twiet populêr is en ander gebruikers dit verder versprei. Beide twiets en hertwiets kan nagespeur word om te sien hoe dikwels dit gelees word. 

Gebruikers kan inskryf vir ander gebruikers se twiets – dit staan bekend as following en intekenaars staan bekend as followers  of tweeps. Gebruikers kan ook ander gebruikers blokkeer as hulle dit so verkies.

As `n gebruiker iemand wil antwoord of noem, word `n @-teken voor die persoon se gebruikersnaam gevoeg. Om `n twiet van `n ander Twitter-gebruik te deel met jou eie lesers, kan jy die retweet knoppie in die twiet self gebruik.

Kyk gerus dié oulike, geanimeerde geskiedenis van Twitter op YouTube.

[SOURCE: www.wikpedia.org]

Mathematica at SUMathematica by die US

Thursday, July 16th, 2015

Modern computational tools are important in diverse disciplines, and they are clearly essential in fields requiring sophisticated mathematics, complicated numerics or the processing of large amounts of data.  Over time each field has developed an array of their own specialised solutions or packages.

However, a campus-wide license has recently been obtained for the package Mathematica developed by Wolfram Research Inc. Mathematica is one of a very small group of extremely powerful, high-level software packages specialising in advanced algebraic, numerical and image processing computation.

mathematicaAt Stellenbosch University colleagues have been using it successfully in the biological, mathematical and physical sciences, and also in economic and management sciences for both teaching and research.  It is therefore really worthwhile exploring whether it is suitable for your academic work too.

In addition to its function as a high-performance research tool it is has also developed to be an efficient, user-friendly teaching device.  It is powerful beyond any other general symbolic manipulation package, and easy to use at base level.  Mathematica places the emphasis on computation of mathematical objects and comes with its own formal language.  It also interfaces with an extensive audited database, which might be known to some readers through the Wolfram Alpha website.

For a license to use the Mathematica software, please contact narga@sun.ac.za.

[Article by Kristian Muller-Nedebock]

 

Moderne berekeningshulpmiddels is belangrik in verskeie dissiplines, en veral noodsaaklik in studievelde waar gesofistikeerde wiskunde, komplekse getalle of die verwerking van groot hoeveelheid data vereis word. Mettertyd het elke veld sy eie versameling gespesialiseerde oplossings of pakkette ontwikkel. 

’n Kampuswye lisensie is egter onlangs verkry vir die pakket Mathematica  wat deur Wolfram Research Inc ontwikkel is. Mathematica is een van ’n baie klein groep buitengewoon kragtige, hoëvlak sagtewarepakkette wat spesialiseer in gevorderde algebra, getalle en beeldverwerkingsberekenings.

mathematicaBy die Universiteit Stellenbosch het kollegas dit reeds met welslae gebruik in die biologiese, wiskundige en fisiese wetenskappe, sowel as in die ekonomiese en bestuurswetenskappe in beide onderrig en navorsing. Dit is dus regtig die moeite werd om uit te vind of dit ook toepaslik vir jou akademiese werk kan wees. 

Bykomend tot sy funksie as ’n hoëprestasie navorsingshulpmiddel, het dit ook ontwikkel tot ’n doeltreffende, gebruikersvriendelike onderrig-instrument.  Dit is kragtiger as enige ander algemene simbool-manipulasiepakket en boonop maklik om te gebruik op basisvlak.  Mathematica plaas die klem op die berekening van wiskundige objekte en kom met sy eie formele taal. Dit is gekoppel aan ’n uitgebreide, geouditeerde databasis waarmee sommige leerders dalk al kennis gemaak het deur die Wolfram Alpha-webwerf. 

Vir `n lisensie vir die gebruik van die Mathematica sagteware, kontak narga@sun.ac.za.

[Artikel deur Kristian Muller-Nedebock]

 

Register for Wi-Fi access Registreer vir Wi-Fi-toegang

Tuesday, July 14th, 2015

If you are required to work on more than one SU campus and need an internet connection, there’s something you have to keep in mind.

To use Wi-Fi on the Stellenbosch, Tygerberg or USB campuses you will have to register your devices separately on all three campuses. If you’re already using Wi-Fi on your home campus, it doesn’t mean you’re automatically registered for others.

To use the Secure of  MatiesWifi SSIDs elsewhere, register your device by e-mailing the following information to help@sun.ac.za:

  • Building
  • Room number
  • Username
  • Asset tag of the laptop or a description of the device
  • Network card address (also known as the MAC address)

Indien jou werk vereis dat jy op meer as een US-kampus moet werk en `n internetverbinding nodig mag hê, is daar iets wat jy in gedagte moet hou.

Om Wi-Fi te kan gebruik op Stellenbosch, USB of Tygerbergkampus moet jou rekenaar of toestel op al drie kampusse apart geregistreer wees. As jy reeds Wi-Fi op Stellenbosch-kampus gebruik beteken dit nie dat jy outomaties Wi-Fi op al die ander kampusse kan gebruik nie. 

Om dus die Secure of  MatiesWifi SSIDs elders te gebruik, registreer jou toestel deur die volgende inligting aan help@sun.ac.za te stuur:

  • Gebou
  • Kamernommer
  • US nommer
  • Gebruikersnaam
  • Batenommer van skootrekenaar of `n beskrywing van die toestel
  • Netwerkkaartadres (ook bekend as die MAC-adres)