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RE: Linux Certification
by Leo Mauler 26 Apr '05

26 Apr '05

Ouch, I thought the RHCT was only $256, I'm taking a class for that one and the instructor (at JCCC) says its only $256 for the RHCT. Obviously the RHCE is a lot more expensive. --- Brad <brad(a)bradandkim.net> wrote: > On Thu, 2005-04-21 at 10:02 -0700, Leo Mauler wrote: > > but you can still > > get that RHCE/RHCT cert for less than $300. > > It is actually $749 to sit for the RHCE exam. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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RE: creating controlled latency/jitter
by Garrett Goebel 26 Apr '05

26 Apr '05

Gerald Combs wrote: > > crash3m wrote: > > > I need to test some real time traffic, but I need to create some > > 'interference' to simulate a flaky internet connection. I am trying > > to create controlled latency so that I can determine at which point > > latency (and jitter) becomes a big problem. Would this be a job for > > QoS? > > If you need to simulate flakiness at layer 2 you might be able to use > FreeBSD's dummynet(4) driver. Dunno if there's an equivalent Netfilter > module for Linux. We've used dummynet here at work. It works well. You can control bandwidth, latency, packet loss, multiple paths... Here's a short tutorial: http://cs.ecs.baylor.edu/~donahoo/tools/dummy/tutorial.htm And it's author's page: http://info.iet.unipi.it/~luigi/ip_dummynet/ I spent a long time looking for an equivalent linux solution. There used to be something that could be made to introduce latency using ethertap and a 2.2 kernel. But I was otherwise unable to find a way to simulate delay using linux. If anyone knows of anything, please let me know. cheers, Garrett -- Garrett Goebel IS Development Specialist ScriptPro Direct: 913.403.5261 5828 Reeds Road Main: 913.384.1008 Mission, KS 66202 Fax: 913.384.2180 www.scriptpro.com garrett at scriptpro dot com

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RE: Linux Certification
by Leo Mauler 26 Apr '05

26 Apr '05

--- Jack <quiet_celt(a)yahoo.com> wrote: > --- Leo Mauler wrote: > > Don't know much about this being a good way to > > find out about prospective employees. Some of > > us are very good at bluffing: about four years > > ago I had never touched Microsoft Excel, and > > yet I scored 88% on the test for it for some > > temp agency. > > If you scored 88% on a programming test, I > certainly wouldn't hire you. That would mean that > someone would have to fix more than 10% of your > code. Not an exciting prospect. I only mentioned it because at the time, I actually scored higher than most of their applicants (who may well have been bluffing, poorly, as well). Naturally a hands-on programming test would be much more difficult. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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RE: Linux Certification
by Leo Mauler 26 Apr '05

26 Apr '05

Which testing packages were you going to use? I haven't explored that area of Linux distro packaging. --- Jack <quiet_celt(a)yahoo.com> wrote: > --- Leo Mauler wrote: > > Don't know much about this being a good way to > find > > out about prospective employees. Some of us are > > very > > good at bluffing: about four years ago I had never > > touched Microsoft Excel, and yet I scored 88% on > the > > test for it for some temp agency. > > > If you scored 88% on a programming test, I certainly > wouldn't hire you. That would mean that someone > would > have to fix more than 10% of your code. Not an > exciting > prospect. But I was actually referring to tests that > I > would create using test building software that comes > > free with Linux. I think tests should be created > specifically for the needs of the company doing > the hiring. I haven't been to any of the "prove it" > test sites. Certainly, they are no magic bullet. But > a > > certificate only says you studied some book, or took > a > course and then took a test and can be relied upon > to > perform any task identical to the test. > > Of course the performance tests are better than > this. > > Multiple choice tests are the worst measure. > > > Brian D. > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > _______________________________________________ > Kclug mailing list > Kclug(a)kclug.org > http://kclug.org/mailman/listinfo/kclug > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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RE: Screen Resolution Trends
by Leo Mauler 26 Apr '05

26 Apr '05

You should consider a second monitor. XFree86 has the option "Xinerama" for extending your screen onto two or more monitors. You don't need a two or more "head" video card, just a second or third PCI video card plugged into your home system. I've extended my 1024x768 17" monitor onto another 1024x768 17" monitor, and I'm considering building a shelf to add a third monitor pyramid-style. Its really handy for the multiple working windows, especially when you're doing something with GIMP and you want to move your tool windows over onto the second monitor. I'm building another machine as well and I'm looking into adding lots of monitors to it with a shelf set (try http://webgiant.sdf1.org/thriftycomputer/ for local KC thrift stores carrying sub-$10 monitors for that extra monitor). --- "Kelsay, Brian - Kansas City, MO" <brian.kelsay(a)kcc.usda.gov> wrote: > >-----Original Message----- > > > > Something that's been skirted in this discussion > > is the idea that the whole point of a windowing > > environment is that no one application takes > > all of the resources - they share the screen, > > so whatever the screen's maximum resolution is, > > any given app should take _less_ than that for > > it's standard resolution. > > > > That's been something that's frustrated me. We > > have this ideal of multiple working windows, but > > unless you're on some super-pricey graphics > > workstation you're usually reduced to maximizing > > each application in turn to make the most of your > > resources. > > I have to put my home monitor on 1200x1600 so that > I can get a decent workspace w/ several apps open > at the same time and them all be usable. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re: Linux Certification
by Leo Mauler 26 Apr '05

26 Apr '05

This /. article isn't about individual certification, but Linux Standard Base certification for distros. Or rather, the fact that distros are resisting LSB certification. --- djgoku <djgoku(a)gmail.com> wrote: > Interesting this came up on /. > > http://linux.slashdot.org/article.pl?sid=05/04/19/1836234&tid=198&tid=4&tid… __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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creating controlled latency/jitter
by crash3m 26 Apr '05

26 Apr '05

I need to test some real time traffic, but I need to create some 'interference' to simulate a flaky internet connection. I am trying to create controlled latency so that I can determine at which point latency (and jitter) becomes a big problem. Would this be a job for QoS?

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Re: database
by Jim Herrmann 26 Apr '05

26 Apr '05

Creative Commons baby! Steven Danz wrote: > Wow... you mind if I borrow this? I'll reference you of course. I > used to do the DBA thing long ago, and I've been trying to explain > some of these same things to some DB newbs, and just couldn't get it > to come across this clearly. > > Thanks for your time. > > Steven > > Jim Herrmann wrote: > >> Tim, >> It sounds like you are wanting to do a fairly simple database >> structure, which is a good way to get started. When you say "open >> database format", I assume that you are talking about a target >> platform of a relational database, something like MySQL or Postgres. >> Yes? But that's getting ahead of the design curve. Here's how to >> proceed if you want to follow something akin to a formal database >> design process. I've been doing this for about 18 years as a DBA. I >> hope I'm not volunteering too much information. You said you were a >> newb. :-) >> >> The first thing you need to do is create a logical model. When doing >> a logical model use English business names, and not programming >> abbreviations. Identify all the *Entities* that you need to >> represent, and the *Relationships* between those entities. A entity >> is a singular noun, which would include things like "Person", >> "Department", or in your case, "Reminder". A relationship is a verb >> phrase like "has many", "has one", or "has zero or many". So, you >> can say something like "a Department has many Persons" and "a >> Department has one and only one Manager". >> >> Once you have this, you can create an Entity-Relationship (ER) >> diagram. This gives you a very high level view of your data >> structure. This would be a box for each entity and a line between >> the boxes represents a relationship. Exactly what the box and line >> looks like depends on the modeling tool you use. Then you need to >> identify all the attributes (fields) for each entity. You need to >> identify which attributes uniquely identify an occurrence (row) of >> that entity, and that's your natural key. Keys of parents, of a >> relationship, migrate to the children. If the parent is required for >> a child to exist, then it is an "identifying" relationship, and and >> the parent's keys become part of the child's keys. If it is a >> "non-identifying" relationship, then some or all of the parent key is >> NOT part of the child's key. Now, if you find an attribute occurs >> multiple times in an entity, then you should "normalize" those >> attributes into another entity or entities. There are several levels >> of normalization, and I won't get into it here as it would be a full >> day class, but third normal form is considered the best level of >> normalization for most DB designs. That's where each attribute of >> each entity is dependent upon the key, the whole key, and nothing but >> the key, so help me Codd. (E.F. Codd, an IBM fellow, created >> relational database theory.) :-) >> >> Once you have a fully attributed ER diagram, you are ready to create >> a physical model based on the logical model you created. This is >> where you create names that you want to use in your program, as you >> turn entities into *tables* and attributes become *columns* and >> relationships become *foreign keys*. You might shorten "Department" >> to "DEPT", for example. It's best if you use standard abbreviations, >> meaning be consistent, as much as possible. It makes programming >> much easier. The length of table and column names may need to be >> shortened, depending on the target database. That's part of the >> physical design process. You also need to decide what indexes will >> be on your tables. Some for uniqueness, such as on the key, and some >> for performance, depending on how you are going to access your data. >> >> There are also performance and convenience tricks that you can do >> when you take your model physical. For example, if you have some >> natural keys that have lots of columns, you might introduce >> artificial keys, which would be something like an integer or reverse >> timestamp. You may also at this point decide to "denormalise" some >> entities to make your system go faster, but that comes at a price of >> maintaining redundant data, and it breaks Codd's rule. Depending on >> the DB platform, there are lots of physical implementation issues to >> consider, if you are building something with lots of data or lots of >> transactions, but you probably don't need to concern yourself with >> all that for this project. >> >> Hopefully you find this information helpful. If you have any further >> questions about data base, I'd be glad to help. Sorry about the >> brain dump. ;-) >> >> Enjoy, >> Jim >> >> Tim reid wrote: >> >>> I'm thinking of programing/writing/whatever a database to keep track >>> of some information for work. I think that I would like to keep track >>> of 7-12 fields of information, and be able to set up reminders that >>> are tagged to date information. For instance, "you did such and such >>> 30 days ago...you can now file the claim, here is the information that >>> you recorded earlier." >>> >>> How would i go about doing this, free as in beer, in an open database >>> format? Let me also mention that I'm a total newb ;) >>> >>> TIA, >>> >>> Tim >>> >>> >>> >> > > > -- Progressive Values ARE American Values Responsibility, Empathy, Freedom, Opportunity, Prosperity, Fairness, Trust, Honesty, Open Communication, Community, Cooperation http://musicalprogress.org/

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Vim/vi scroll-margin
by Gerald Combs 25 Apr '05

25 Apr '05

Is it possible to force vim/vi to not place the cursor at the bottom of the screen when searching? For example, if I search for "some_func()" and match the example below, vim will more often than not place the cursor and the first line of some_func() at the bottom of the screen. If I want to see all of the arguments to some_func, I have to scroll down. Pine has a setting called "scroll-margin" that forces the cursor into a zone <n> lines from the top and bottom of the screen. Does vim have something similar? some_func(a, really, long, list, of, arguments, that, spills, over, into, several, lines, and, will, likely, be, hidden, from, view, thereby, requiring, a, bit, of, scrolling);

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Re: UML CASE tools
by Jack 22 Apr '05

22 Apr '05

--- Jim Herrmann <kclug(a)itdepends.com> wrote: > Our company uses Rational Rose for UML modeling, and > ERwin for DB > modeling. But now you're talking serious money for > either of those > tools. Probably not what you're looking for, but I > thought I would > offer it up. Have you looked at Dia? It will draw > boxes that you can > connect. You can't generate anything out of it, but > it's got the > boxes. Thanks Everyone for the responses. I went with Dia + tedia2sql for the time being. With Dia you can use UML class objects to do the drawing (turn off the display of functions. Adding attributes for the fields. You can set Primary keys by setting them as protected elements. Tedia2sql can read the dia document and create sql scripts that can be used to create the database objects with primary keys and foreign keys if you want. It can create for many db formats and can handle quite complex set ups. Not quite the one step type of operation I was looking for but a real big time-saver. Brian D. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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