Ask Ubuntu General Room

WinEunuuchs2Unix

3:00 PM

So it's a 3 decade habit of mine :)

terdon

3 decades ago, most things took more than a second :P

WinEunuuchs2Unix

No we used batch end of day processing for long running stuff.

also called nightly updates.

plus everything was text based so a screen was 2k characters not 1920x1080x32 bit color.

terdon

May I suggest simply using something like printf "." instead of fiddling with a fancy progress bar then? You still show it's working, but its much simpler. So, either do something like :

 while whatever; do printf '.'; done; printf '\n'

WinEunuuchs2Unix

Yes I saw that printf example, but my bash script has no terminal unless you call it from there... it's called from the desktop and uses GUI unless you are testing. Wget uses the [######...........] progress display but I'm piping that through yad too.

terdon

Or ptrint a fancier yet simple animated thingie like:

while : ; do printf '|'; sleep 1; printf '\r/'; sleep 1; printf '\r-'; sleep 1; printf '\r\\'; sleep 1; printf '\r'; sleep 1; done

WinEunuuchs2Unix

3:05 PM

^^^ There is tons of code in Stack Exchange for doing progress bars in terminal like that. The \r is cool for backing up over the same line :)

terdon

symbols=("|" "/" "-" "\\")
while : ; do for s in "${symbols[@]}"; do printf '\r%s' "$s"; sleep 0.3; done; done

WinEunuuchs2Unix

^^^ The spinning text pizza :D I wrote my own before seeing that for the systray indicator updated from bash... Mine has more lines of code though as I was still learning sigh

Is there a size limit on bash arrays?

terdon

I don't think so. But there is if you try to pass a ling array as a list of arguments. You will hit the ARG_MAX limit.

By the way, here's how to print that spinning thing until the last command launched in the background finishes:

WinEunuuchs2Unix

I just googled the limit is 1.3 GB.

terdon

symbols=("|" "/" "-" "\\")
sleep 20 &
while [ -d /proc/$! ]; do for s in "${symbols[@]}"; do printf '\r%s' "$s"; sleep 0.3; done; done; echo ""

@WinEunuuchs2Unix Oh. Huh, OK. Well that should be more than enough. You'd be crazy to work with GB of data in a bash array. It will be slow as a glacier.

WinEunuuchs2Unix

3:10 PM

@terdon The array will only have a couple hundred file names and linked AU answer ID's.

Here's that text spinning pizza in Ubuntu's systray with an animated gif to see it in action: askubuntu.com/questions/837078/…

terdon

"only" :) But yeah, OK. Bash will be able to handle that in its slow, cumbersome, ponderous way.

WinEunuuchs2Unix

@terdon After I "grow up" I'll rewrite it in SQL and C...hehe

terdon

@WinEunuuchs2Unix Heh, nice :)

@WinEunuuchs2Unix OK, no need to go overboard either :)

WinEunuuchs2Unix

I do want to learn SQL in a couple of years though... porting existing bash apps are probably the best way for me.

terdon

I would strongly urge you to learn a middle way, a "normal" scripting language. Things like perl, python, ruby, go etc.

WinEunuuchs2Unix

3:14 PM

bash is the common denominator that everyone has to learn though.

what you type in the terminal.... you type it almost exactly (if not exactly) the same way in bash.

vendors provide driver install scripts in bash....

I don't mean to be argumentative but for whatever reasons in my mind it's important to learn bash.

terdon

Oh it is, of course it is!

And bash (shell in general) is extremely useful and absolutely the right tool if your script's job is to run various other commands. All I'm saying is that it isn't the right tool when it comes to more complex programs where the real work is done by the program you are writing and not by external tools that it calls.

I very often start writing something in bash, then figure out it's more complex than anticipated and switch to another language.

L. D. James

@WinEunuuchs2Unix I agree with @terdon. It's good and important to learn bash... using it for quick tasks are good, but there is important programming functionality that comes with one of the other languages that is important to become familiar with.

Later you can add some of those concepts to your bash scripts.

terdon

To give a very simple example:

Sergiy Kolodyazhnyy

@TheWanderer nope. Is whitefish same as tilapia ?

L. D. James

Not learning some of the power of the other languages will leave some void in programming understanding if you limit yourself to bash.

terdon

3:21 PM

$ echo $(( 10 / 3 ))
3
$ perl -le 'print 10 /3 '
3.33333333333333
$ python -c 'print(10 / 3)'
3.3333333333333335

TheWanderer

@SergiyKolodyazhnyy no

go buy some

Sergiy Kolodyazhnyy

k. is it good ?

terdon

@L.D.James I think he knows what real tools can do:

23 mins ago, by WinEunuuchs2Unix

In mainframe programming classes (in college) they said anything that takes longer than 1 second requires a message.

TheWanderer

@SergiyKolodyazhnyy very

L. D. James

Sorry... I didn't read the whole log. I was responding on the part where you suggested programming Languages, and I thought he said he would just sick to bash.

Sergiy Kolodyazhnyy

3:24 PM

@L.D.James absolutely true. It's all about stepping out of comfort zone and dealing with the unfamiliar.

WinEunuuchs2Unix

@L.D.James After becoming comfortable with bash I was planning on relearning C for application development in Linux. I know Python would be easier than C but that's my current long term plan.

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix do both, c and Python. There's a lot of cross over and API in Python that draw on power of C tools

L. D. James

It's good to have a favorite language and know it inside and out. By the way, one of my first languages was C... I'm quiet self taught... I have a little problems with C++... most of my C++ programs have lots of C, whereas it should be replaced with C++.

terdon

Well, ideally, you'd need all three. Many things are too complex to be worth the effort in bash yet too simple to be worth the effort of C. Those tend to be trivial or very easy in the mid-level dedicated scripting languages like perl, python, ruby etc, extremely hard or impossible in bash and perfectly possible but far more complex than necessary in C.

L. D. James

I'm not sure which one is best to start out with... C or C++... what do you think of being the first one between, C and C++, @terdon ?

Sergiy Kolodyazhnyy

3:28 PM

yep, and writing gtk stuff in Python is far easier than C

WinEunuuchs2Unix

I see C (sorry for rhymes) as necessary for writing the libraries stuff like .GetCustomerName (...), AddRecord (...), .CheckWifi (...), etc. Then those libraries can be called from Python???

L. D. James

My last and most recent language is Python. I like it and should have started it earlier.

terdon

@L.D.James I don't really know either well enough to have an opinion. I do know that Linux itself is written in C and not C++ and that C is easier. It is also the one the rest are based on so I would guess C would be a better start point, but I really don't know.

Sergiy Kolodyazhnyy

@L.D.James start with C. Object oriented nature of C++ takes a bit of time to grasp

Thomas Ward

@KazWolfe Yes I can but later I am busy right now

terdon

3:29 PM

Nov 2 '15 at 23:51, by terdon

My C-fu is pitifu.

Sergiy Kolodyazhnyy

lol

Thomas Ward

@terdon C++ is closer to Java in ease of coding. C you have to do memory allocation yourself

WinEunuuchs2Unix

How can you remember to dig stuff up that's 18 months old??? Your memory is better than my 2TB's of combined drives.

terdon

@ThomasWard Oh, C++ doesn't need that?

@WinEunuuchs2Unix There's a search function in chat :) And "C-fu" doesn't appear very often.

Sergiy Kolodyazhnyy

anybody wanna put the last vote ? askubuntu.com/q/899353/295286

WinEunuuchs2Unix

3:31 PM

I couldn't remember saying "C-fu" 18 months ago... I have a hard time remember what I typed in chat last night.

terdon

@WinEunuuchs2Unix Well, yeah, but I was inordinately pleased with myself with that pun, so it stuck.

L. D. James

@ThomasWard You're right about C++ being substantially easier than C once you understand the structure... which isn't hard to learn when you realize it different from C.

The strings and libraries are extremely powerful and easy to use.

Thomas Ward

@terdon it can do dynamic allocation like java and python do without needing to define memory constraints itself for variables and malloc and such. Part of the core IIRC but you can do it if you want to.

TheWanderer

NBC wtf

popup ads?

Thomas Ward

@L.D.James This

L. D. James

3:37 PM

Some people preach against using and IDE... but I believe working without a good IDE is like trying to use a hammer and pliers for most of your jobs in handy man, rather than acquiring a good set of tools.

My favorite IDE (even for Bash) is Eclipse... what do some of you use?

terdon

@ThomasWard Cool. I hate the maloc stuff I had to wade though in C.

WinEunuuchs2Unix

Anyway I sharpened my teeth on IBM JCL (Job Control Language), IBM OS/400 and IBM DOS batch files and I just think BASH is wonderful in comparison. BASH is also light years ahead!

terdon

@L.D.James Emacs. Of course.

L. D. James

@ThomasWard Your "this" doesn't have a link.

Emacs is my default text editor.

TheWanderer

block this domain if you go to nbc.com nbc.com/generetic/generated/generetic-responsive.js?v2.34.43

L. D. James

3:41 PM

@terdon That's probably why you rarely use C.

WinEunuuchs2Unix

malloc is always important... your job needs to gracefully exit from memory full situations too before DOOM kills your app in a way that corrupts stuff.

L. D. James

@ThomasWard Figured out your "this" link... I use the reply option often... but missed it this time.

@WinEunuuchs2Unix That is what is Terden is saying is automatically done in C++.

WinEunuuchs2Unix

@L.D.James Oh sorry missed that part... I was toggling back and forth between mainboard where I was posting a question.

L. D. James

@terdon I use Eclipse for everything. Just recently I started using it for editing my Questions and Answers for SE.

terdon

I use emacs for everything :)

L. D. James

3:49 PM

The Eclipse markdown preview in my Eclipse settings has one annoyance... I can't figure out how to make the Markdown Live Preview automatically update without switching from the editor where I'm typing. I've been meaning to get around to ask some of the Guru's on SE if it's possible.

terdon

@L.D.James No, I don't use C because I don't really know it and don't like it at all. Emacs is an IDE if you set it up to be one.

L. D. James

Does Emacs have a Live Markdown Preview?

terdon

Of course.

At least, I know it can do that for LaTeX (show the compiled doc) so I'm sure it can do it for markdown.

L. D. James

I was typing, asking you for a link to how to set it up.

terdon

Unless you're looking for this:

16

Q: How can I use the SE flavor of Markdown in emacs?

I would like to use the SE flavor of markdown in my emacs. The default Markdown mode has some features (backticks and indentation mark code, # makes a header and > also changes the font) but I would also like to have: * to make a list item, including indentation. [foo](http://example.com) to sh...

L. D. James

3:51 PM

Are you reading my mind?

terdon

:)

Seth

0

A: Problem installing Spotify on LXDE - E: Unable to locate package spotify-client

Well, you could try making your CPU 64-bit compatable, but I wouldn't reccomend it as you are new to the system, and it may damage your CPU. If you have a samartphone or tablet, i think you should just play it on that... if not.... you really can't.

wat

4

Bhargav Rao

Hi, needed some help on a few deleted posts.

jokerdino

Yep

Bhargav Rao

Oh, @jokerdino you here! I'll ping ya there.

terdon

3:57 PM

@L.D.James you might also enjoy these extensions:

chrome.google.com/webstore/detail/edit-with-emacs/…

addons.mozilla.org/en-US/firefox/addon/its-all-text

jokerdino

I am here, I am there.

Bhargav Rao

@jokerdino New titanic song. Here, There, Where evaar you were!

L. D. James

Thanks! I added it.

lewis4u

4:33 PM

Helou guys and girls

anyone using openbox ???

i am trying to install it on ubuntu server

i need to understand something, when i install openbox then i need to install xorg or xinit???

what is the difference?

Seth

@lewis4u yes you do

@lewis4u xorg is the display server. openbox is just a window manager that sits on top of the display server. xinit is several scripts that allow you to manually start xorg.

lewis4u

4:56 PM

what do i need to configure to get into gui right away on boot

Rinzwind

I installed 17.04 quicker than the boat race lasted :=D

lewis4u

@Seth what do i need to configure to get into gui right away on boot

Seth

that I don't know off the top of my head. If you install openbox and it doesn't work after a reboot feel free to ask a question on Ask Ubuntu.

Rinzwind

@lewis4u what do you mean? auto-login? That is a setting at the user settings.

lewis4u

yes that

where do i configure that

Rinzwind

5:01 PM

eh openbox or unity?

Seth

oh auto login?

lewis4u

in which file

openbox

Rinzwind

file. oh that is a good one D:

TheWanderer

SPAM SPAM SPAM SPAM SPAM

Thomas Ward

@L.D.James I don't use that as links all the time Sometimes I use that as a general "This is right" pointer

Rinzwind

5:02 PM

/etc/slim.conf

auto_login yes

lewis4u

i don't have that file

this is what i have inside /etc pastebin.com/vL53HAhx

L. D. James

@ThomasWard Thanks. I usually don't either. Just on special occasions, especially if there are a number of topics going at the same time, or the original content has scrolled off the page. I referenced it just to acknowledge I found your meaning.

Rinzwind

5:22 PM

17.04 some good things: booting is 0.03 seconds quicker than 16.10 for me.
Nautilus caching works out of the box (I see icons for video files).

hmm is there a openbox.conf somewhere? >:)
there must be a conf file :P

lewis4u

yes there is...just a sec

Sergiy Kolodyazhnyy

Eggscited , so eggscited

Hi, my name is Sergiy, and i am excitement from script ideas addict

@TheWanderer shouldb be " hue hue hue hue hue "

lewis4u

@Rinzwind in /usr/bin there is openbox-session and openbox file