Ask Ubuntu General Room

Kaz Wolfe

00:53

@NathanOsman got the thingy working... power.

wtf

TheWanderer

01:09

Wat

@KazWolfe Samsung?

Anyone have any good tactics for convincing a Dev to give you access to his code?

He doesn't know Java very well so he's sending me the files individually

Kaz Wolfe

01:42

github

also... new challenge of the day. write data to Pi SD card immediately, because the Pi can power off at any time.

TheWanderer

Uh wat

Kaz Wolfe

I am misusing technology.

I have a Pi hooked up to an RFID reader. Both of these run on a battery.

Seth

voltage regulator?

Kaz Wolfe

After I capture data on the reader, I just want to kill the power (the Pi is headless) but still ensure my capture data is saved

TheWanderer

What are you doing?

Seth

01:48

@KazWolfe I feel like there is an fstab/mount option to force this.. but I cannot recall

TheWanderer

Super secret spy stuff?

Kaz Wolfe

just a headless pi

TheWanderer

Super secret pi stuff?

Kaz Wolfe

02:24

sure fine whatever

craftxbox

03:38

wait .04 is lts right?

Kaz Wolfe

even.04

craftxbox

ooh

Ubuntu Questions on U&L

07:52

0

Q: Auto mount iscsi device on system start (Ubuntu)

I want to auto-mount /dev/sda1 (iscsi device) to /iscsi2 on system start so I added the following line to /etc/fstab: UUID=d159d371-379f-4730-a832-0fad31fd3ff6 /iscsi2 ext4 auto,acl,user_xattr,nofail,_netdev 0 2 After a system reboot, /iscsi2 is empty. I can't even mount ma...

Ubuntu Questions on U&L

10:24

0

Q: How to remove eject icon without formatting

I have problem with my Ubuntu 16.04 Xenial Xerus. The problem is beginning after i change the operating system from windows to ubuntu. I leaving 1 Disk with my personal document. After changing to ubuntu i see the eject icon is appears continuously. So how to remove the eject icon without formatt...

ubuntu hard-disk file-format

fossfreedom

13:11

→ 35 messages moved to Trash

Rinzwind

fossy!

fossfreedom

always enjoyable setting fire to the trash

Byte Commander

13:31

Now it smokes.

trilolil

hello everyone

Could someone help me out?

It s been 2 days that I am stuck with the same problem and I still haven't managed to solve it...

0

Q: cmake build issue: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>

I am trying to build some provided C++ examples by following this tutorial which proposes those steps: cd dlib/examples mkdir build cd build cmake .. cmake --build . --config Release Issue is that when executing cmake --build . --config Release I get the following error: yalishanda-think...

compiling make

according to some people I should try to recompile sqlite, but I have no idea about how to correctly do that

@ByteCommander according to your profile, you seem to have quite some experience. Do you have any advice?

trilolil

14:12

anybody?

fossfreedom

@trilolil random googling ... try adding "-D_GLIBCXX_USE_CXX11_ABI=0" to the end of the CMake line

trilolil

@fossfreedom already tried it. Didn't solve the issue

fossfreedom

k - you should add to your question what you have actually tried.

trilolil

@fossfreedom oh wait... you say at the end? I put it in the beginning, right after

cmake_minimum_required(VERSION 2.8.12)

PROJECT(examples)

Where exactly should I put it then?

fossfreedom

not a clue - but as I said - you've tried a few stuff like this but its missing from your question.

there are dlib packages here - launchpad.net/ubuntu/+source/dlib have you looked at the debian/rules to see how it is compiled?

trilolil

14:25

@fossfreedom updated my post

I can't find a link or whatsoever called "rules". What are you referring to?

I followed those steps: https://www.learnopencv.com/install-dlib-on-ubuntu/

fossfreedom

unpack this launchpad.net/ubuntu/+archive/primary/+files/…

trilolil

@fossfreedom and try to install it?

there is no readme or whatsoever...

fossfreedom

? no - the rules show how that dlib library was actually built. It should help you compile your own version of the library. Assuming that is what you are trying todo.

trilolil

@fossfreedom I am very new to that sort of stuff, I m far from being an expert. rules just contains those lines:

#!/usr/bin/make -f
# See debhelper(7) (uncomment to enable)
# output every command that modifies files on the build system.
#export DH_VERBOSE = 1

# see EXAMPLES in dpkg-buildflags(1) and read /usr/share/dpkg/*
DPKG_EXPORT_BUILDFLAGS = 1
include /usr/share/dpkg/default.mk

# see FEATURE AREAS in dpkg-buildflags(1)
#export DEB_BUILD_MAINT_OPTIONS = hardening=+all

# see ENVIRONMENT in dpkg-buildflags(1)
# package maintainers to append CFLAGS
#export DEB_CFLAGS_MAINT_APPEND  = -Wall -pedantic
# package maintainers to append LDFLAGS

I don't see how that can help me

fossfreedom

its running a ./configure with that -DDLIB_NO_GUI_SUPPORT=ON parameter compiling with cmake --sourcedirectory=dlib.

Obvious question - why are you compiling your own library when there is one prebuilt in the repo for you?

libdlib-dev

trilolil

14:35

@fossfreedom idk, as said I am new to that sort of stuff. I am following the tutorial. it seems to contain some very nice examples which is exactly what I need.

The pkg i just extracted at first sight doesn't seem to contain such examples

Maybe a correcter question would be: why does that dude not use the prebuilt repository

fossfreedom

the link I gave you was just how the library was built. You install the package with sudo apt install libdlib-dev - then that dev library is available for you to link with.

trilolil

As a beginner in linux, I cannot know everything. I am not surrounded by more experienced developers/engineers to show me how to avoid that type of (shitty) pitfalls. The only people able to help me when I m stuck are usually here in the chat or on askubuntu

cl-netbox

Hello everybody :)

trilolil

@fossfreedom ok I ll just do sudo apt and stop all the rest

fossfreedom

@cl-netbox hi - and how are you? :)

cl-netbox

14:41

@fossfreedom Hi David :) I'm fine - thank you for asking ! :) What about yourself ? Everything fine too ?

fossfreedom

just finished Alpha 2 testing. Exhausting !

trilolil

@fossfreedom ok installed it. I'd like to now just copy one of those examples to my own folder. How can I know how to correctly compile that code?

I tried to do "pkg-config --cflags --libs libdlib-dev", but that returned:

Package libdlib-dev was not found in the pkg-config search path.
Perhaps you should add the directory containing `libdlib-dev.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libdlib-dev' found

I don't really know what steps I should follow to know how to compile such a provided example. It doesn't seem to include any exotic/custom ehaderfile. the includes are:

cl-netbox

@fossfreedom this is something I can imagine indeed ... trying to get out flawlessly working software is not a trivial thing. :)

trilolil

#include <dlib/image_processing/frontal_face_detector.h>
#include <dlib/image_processing/render_face_detections.h>
#include <dlib/image_processing.h>
#include <dlib/gui_widgets.h>
#include <dlib/image_io.h>
#include <iostream>

simply doing g++ <filename> -o <output> doesn't work

What would you suggest?

fossfreedom

@trilolil I'm no expert here - others should pipeup! "--libs dlib" looks like the correct syntax

trilolil

14:46

@fossfreedom pkg-config --libs dlib returns

Package dlib was not found in the pkg-config search path.
Perhaps you should add the directory containing `dlib.pc'
to the PKG_CONFIG_PATH environment variable
No package 'dlib' found

fossfreedom

sigh

trilolil

@fossfreedom my reaction every time I get in touch with linux

fossfreedom

this sort of g++ syntax with pkgconfig? askubuntu.com/questions/824586/…

cl-netbox

@trilolil Hi ! :) another "make" problem ? what about creating a new "SE-make" portal ? :D :D :D

trilolil

@fossfreedom actually I just typed "pkg-config --libs dlib" in my terminal so far

@cl-netbox hey, hahah yhea sure... why the hell does that stuff get so complicated sometimes

idk how people manage to get that stuff working straight ahead. I lose a tremendous amound of time with that

cl-netbox

14:50

@trilolil don't use "make" ... use apt instead ... hahaha :)

trilolil

@cl-netbox thx, will remember that

I tend to remember every advice about linux I get, in order to not lose too much time at every error I face

what do you guys suggest atm?

cl-netbox

@trilolil suggest for what ?

trilolil

regarding compiling that code. I successfully did sudo apt install libdlib-dev

tried now to compile some code provided by dlib

using: g++ <filename.cpp> -o outputName, but that didn't work

the file only contains those includes:

#include <dlib/image_processing/frontal_face_detector.h>
#include <dlib/image_processing/render_face_detections.h>
#include <dlib/image_processing.h>
#include <dlib/gui_widgets.h>
#include <dlib/image_io.h>
#include <iostream>

cl-netbox

@trilolil compiling code is always something what you are doing "on your own risk" ! :D

trilolil

sigh

it is actually an example they provide

fossfreedom

14:53

g++ <filename.cpp> -o outputname $(pkg-config --cflags --libs dlib) at a guess

trilolil

@fossfreedom returns:

Package dlib was not found in the pkg-config search path.
Perhaps you should add the directory containing `dlib.pc'
to the PKG_CONFIG_PATH environment variable
No package 'dlib' found
bash: filename.cpp: No such file or directory

(indeed I tried that command as well...)

this is the actual provided code: paste.ubuntu.com/25184175

nothing fancy afaik

yet uncompilable so far

cl-netbox

@fossfreedom budgie alpha 2 testings must be not exhausting enough as it seems ... hahaha :D

fossfreedom

... always looking for people to help out ... so that I can be more productive elsewhere ;)

cl-netbox

@fossfreedom @JacobVlijm and @Rinzwind seem to use budgie as default DE ... are there better testers around ? I don't think so. :)

trilolil

@cl-netbox do you have any idea about my issue?

Ubuntu Questions on U&L

15:08

0

Q: Only 1024 bytes for /etc/environment each :(

I have a long list (more than 1013 chars) of hostnames and IPs in my /etc/environment no_proxy/NO_PROXY variable, because my corporate proxy does not know them. My local Unbound DNS does. Only some of that hostnames and IPs are working. It looks like pem_env from that package limits the var=valu...

ubuntu environment-variables http-proxy

Seth

Edit Text Editor is No Longer Maintained #linux #dev http://www.omgubuntu.co.uk/2017/07/gedit-text-editor-unmaintained https://t.co/AY8PQj2ihN

Tweeted by omgubuntu on July 27, 2017 at 7:27 AM

Gedit*. Bloody autocorrect.

Tweeted by omgubuntu on July 27, 2017 at 12:32 PM in reply to omgubuntu

Wow. Gedit is dead.

fossfreedom

lol

not really

Seth

Oh?

fossfreedom

looking for a leader

anyone can submit patches etc

Seth

Yeah but with no maintainer what happens to those patches?

TheWanderer

15:17

wheee I'm deodexing things

fossfreedom

often they wait until a leader comes along. Doesn't stop distro maintainers cherry-picking those suggested patches. We (ubuntu) do that all the time.

Benny

So the next Ubuntu release might be without TextEditor by default

fossfreedom

Gedit will be the default for the foreseeable future - works perfectly fine with GTK3 - and with GTK3 now being stable, will not "break"

TheWanderer

I need a diff checker that can compare files with 100k+ lines of code..

Benny

bcompare

cl-netbox

15:24

@trilolil no, unfortunately not ... :)

trilolil

k :/

cl-netbox

@trilolil I would have helped if I could, sorry that I am not able to ... :)

trilolil

np thx

cl-netbox

@TheWanderer you can try "meld" (sudo apt install meld) ... should do that fine. :)

TheWanderer

Sublime actually has a plugin

Nathan Osman

15:34

@KazWolfe this is what you want: superuser.com/a/160186/22596

You want to disable write caching so that all data is immediately written to disk.

Seth

15:53

I knew it was an fstab/mount option :P

WinEunuuchs2Unix

16:28

@DougSmythies Hi Doug. The rm-kernels-server we spent time together developing has been enhanced. You can read about it in the bottom of: askubuntu.com/questions/892076/… Hope things are going well with you.

Ubuntu Questions on U&L

17:13

0

Q: netstat is not showing port opened through ufw

I am setting up a ftp server on my Ubuntu 16. After using the following command: sudo ufw allow 21/tcp sudo ufw status verbose I can see the output that says: 21/tcp ALLOW IN Anywhere But, if I type: netstat -tnlp It does not show the port 21 at all Do I am doing something ...

ubuntu iptables firewall ftp ufw

Doug Smythies

17:43

@WinEunuuchs2Unix : I'll try it, thanks. I'm up to 70 kernels again, so it is time.

Ubuntu Questions on U&L

18:24

0

Q: How to install software's on Virtual Machine?

I have Azure Cloud server installed on Ubuntu VM(F2).I also created Virtual Machine on Ubuntu,But how to operate virtual machine from Window and how I install some software's on Virtual Machine like Geoserver ,PostgreSQL and Apache in Virtual Machine.

ubuntu windows virtual-machine

TheWanderer

18:44

uh oh

trilolil

18:54

Hello

I created the file mylibs.conf

but I can't write to it, it says "permission denied". Although I am root

I can't sudo chmod 700 neither

What solution do I have to write something to that file?

TheWanderer

where did you create it? can you give full error reports?

Ask Ubuntu Meta

19:10

0

Q: Printing AskUbuntu pages

I read: How do I recover my data from an encrypted home directory? and upon printing hardcopy of this, the font size is under 10 points. That is way too small to read easily. When I tried copy & paste into a word processor, that failed, too. QUESTION: What is the purpose of StackExchange site...

support font

trilolil

@TheWanderer in /etc/ld.so.conf.d/

TheWanderer

hrmm

you created it?

look up how to check for the immutable flag

trilolil

@TheWanderer I just solved it. Funny: sudo touch /etc/ld.so.conf.d/someFile.conf works

TheWanderer

shrug

trilolil

but sudo echo "someText" >> /etc/ld.so.conf.d/someFile.conf doesn't work

so I had to sudo su

and then: echo "someText" >> /etc/ld.so.conf.d/someFile.conf

strange...

TheWanderer

19:13

hmmm......

that doesn't make sense

trilolil

indeed

TheWanderer

é o português! @IanC

oh no

Portuguese has another tense for he/ha/has???

ack

IanC

@TheWanderer what do you mean he/ha/has?

TheWanderer

haber

like he visto

IanC

@TheWanderer I'm brazillian though lol

TheWanderer

19:16

@IanC but you speak Portuguese >_>

so the portuguese :D

brasilenho?

IanC

nah, it's protuguese anyways haha

TheWanderer

well then

IanC

well, "he has seem" has a bit different meaning in portuguese

the literal translation of "have seem" means something like "have been seing"

TheWanderer

Google said he estado --> estive and he visto --> tenho visto

but there is a verb for haber... o_O

IanC

there are 3 past conjugations in portuguese, perfect, imperfect and more than perfect

TheWanderer

19:19

lol

more than perfect?

is that like the present perfect in Spanish?

IanC

one is something that happened and is over, another is something that happened and could be still happening, and another I'm not sure but I think it's something that happened before another past event, like a past from past lol

more than perfect is that weird one, that is like a past from past

TheWanderer

oh that's like "he had done that"

I can't remember the name

IanC

it's sort of like, "I have done that before I did this"

I don't know if such a past exists in english, I don't think it does

TheWanderer

hmm

know the name in Portuguese?

IanC

"Ele viajara antes de chegarem à sua casa" - He had traveled before they arrived his home

pretérito mais que perfeito

it's not commonly used though

TheWanderer

19:25

ohhhh

past subjunctive!

I think

@IanC is it the viajara or chegarem?

IanC

@TheWanderer viajara is the past from past

TheWanderer

ok yeah

that's imperfect subjunctive in Spanish

IanC

but I don't think there's this past in english, you have to use "had (verb)"

TheWanderer

yeah

IanC

19:59

man, I'm wondering if I have legal basis to break my internet contract without paying the fidelity fee

two providers announced some internet speeds as the least they could provide me, and I found out both were lying

Mateo

20:23

@KazWolfe I remember there being a power button project, perhaps with a led that could turn off when ssafe yo unplug?

pi-supply.com/product/pi-supply-raspberry-pi-power-switch

Hmm

instructables.com/id/Raspberry-Pi-Shutdown-Button

So yeah, something that waits to shutdown then cuts power blog.petrockblock.com/powerblock this one looks nice

shop.pimoroni.com/collections/pimoroni/products/onoff-shim

Ubuntu Questions on U&L

20:51

0

Q: Amazon EBS volume reported 100% use, but no write errors occurred

Running an experiment on an EC2 instance running Ubuntu... I was using a custom utility that was performing some intensive disk-access operations and saving a lot of small files on an EBS volume. On a lark I checked df and saw that it was beginning to run short on space; /dev/xvdf 2.0T ...

ubuntu disk-usage

Nathan Osman

Well this is unique.

TheWanderer

not found

TheWanderer

21:10

everyone should definitely try editing Smali

it's so much fun

and the language is so intuitive

</s>

Mateo

@NathanOsman add www

TheWanderer

oh

but why

Mateo

Is it via an iframe?

TheWanderer

yup

<iframe src="http://nitroshare.net" id="iframe" style="width: 988px; height: 1323px; left: 167.5px; top: -167.5px;"></iframe>

and then it has some JS

            $(window).resize(function(){
                $("iframe").width($(window).height())
                $("iframe").height($(window).width())
                if(!jQuery.browser.msie || jQuery.browser.version > 9){
                    $("iframe").css("left",$(window).width()/2-$(window).height()/2);
                    $("iframe").css("top",$(window).height()/2-$(window).width()/2)
                }
            })
            $(window).resize(); //start it off

Mateo

so no rotating google huh

lets see

TheWanderer

21:20

do they block iframe?

Avery

yeah probably

TheWanderer

that's possible?

Mateo

yep

TheWanderer

huh

Ubuntu Questions on U&L

21:38

0

Q: problems in download software in Ubuntu on Windows

I am using the Ubuntu on Windows 10 feature and am trying to download the software S4. I have problems installing, and in fact I don't even understand some of the instructions as I'm pretty new to Linux. I hope someone can at least tell me what those instructions mean so I know what might get wr...

ubuntu software-installation make configure free-software

Mateo

nice

would be funny if someone had to run windows in a vm to test ;P

bash on ubuntu on windows on vm on ubuntu

Ubuntu Questions on U&L

22:22

0

Q: Ubuntu and Mint slow on host, fast on VM

A little background: I use Ubuntu as a VM with 512MB RAM and a 1 core processor. It runs good and needs about 30 seconds to start. Then I used a live cd to try it on a Host with 4GB RAM and quad-core. Still ran ok. Then I installed it. Booting time went up to about 2.5 minutes. (including load ...

ubuntu linux-mint boot

TheWanderer

22:46

This is a pretty cool feature in Windows

Seth

stolen from KDE Connect no doubt :P

TheWanderer

Convenience™®©

Terrance

I think everybody is stealing from each other anymore.

TheWanderer

that is how competition works

Terrance

Yep!

Fabby

23:34

And that's why software patents are a bad idea...

>:-)

Terrance

Yay!!! :D

notalwaysright.com/age-is-but-a-number-part-2/73163

Avery

23:58

@Terrance I mean

Their child might have mental issues and the likes.We can't know. Though there are damn hard stuff with 14+ label on it too. So yeah, age ratings are BS, don't judge based on that.

Transcript for

Ask Ubuntu General Room