IRC chat logs for #ltsp on irc.libera.chat (webchat)

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Channel log from 2 October 2013 (all times are UTC)

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00:38	<d{-_o}b_bennabiy> what is the epoptes bugfix for not being able to log out a user?
00:43	<Phantomas> d{-_o}b_bennabiy: Which distro?
00:44	Do you use Mate?
00:46	<d{-_o}b_bennabiy> yes
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00:49	<Phantomas> d{-_o}b_bennabiy: It's a work in progress, be patient until the new version of epoptes comes out
00:50	<d{-_o}b_bennabiy> Phantomas: Do you run Mate?
00:51	<Phantomas> No, I'm with gnome-fallback
00:51	I need to install Mate in a VM to confirm this bug, and then commit the fix.
00:52	<d{-_o}b_bennabiy> when does it become gnome-flashback?
00:53	<Phantomas> Here is the relevant bug https://bugs.launchpad.net/epoptes/+bug/1182193, you can subscribe to get informed about its progress if you want.
00:53	I think gnome-flashback is already out. But I am in 12.04
00:53	(ubuntu)
00:54	<d{-_o}b_bennabiy> ahh
00:54	thank you, I am subscribed
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01:11	<d{-_o}b_bennabiy> !supybot
01:11	<ltsp> supybot: http://ubottu.com/devel/supydoc/plugins/Factoids.html
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02:49	<vagrantc> !seen jammcq
02:49	<ltsp> jammcq was last seen in #ltsp 5 days, 10 hours, 58 minutes, and 28 seconds ago: <jammcq> on thursday?
02:49	<vagrantc> stgraber: well, you did it, i'll be going to the BTS :)
02:49	<stgraber> vagrantc: yay!
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12:00	<cliebow> vagrantc:Yay!!!
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12:16	<jammcq> good morning friends
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12:51	<cliebow> jammcq!!!'
12:51	<jammcq> hey Chuck!
12:51	what's up?
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13:24	<edwin> Morning everyone
13:24	nat question
13:24	if I do a ifconfig on the client it tells me that he has the same address of the server
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13:25	<edwin> and when I open local chrome or firefox it doesn't has internet connection
13:27	<alkisg> !localxterm
13:27	<ltsp> localxterm: Any applications that you launch on a thin client actually runs on the server, not on the client itself. If you want to open a program on the client locally, you can type 'ltsp-localapps <program>' in a run dialog or in a terminal. For example, 'ltsp-localapps xterm' to open a terminal running on the client.
13:27	<alkisg> run ifconfig there
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13:30	<edwin> I did thT
13:30	THt
13:30	that sorry
13:30	ltsp-localapps google-chrome
13:30	it did open
13:30	but no internet connection
13:31	I have internet connection if I open chrome the other way no local
13:33	it says the same info as server
13:37	<alkisg> I'm talking about ifconfig
13:37	So that you can see that your IP there is not the one you said
13:38	Then you'll realize that you need to do NAT on the server for localapps to see the internet...
13:38	There are wiki pages about it
13:39	!na
13:39	<ltsp> Error: "na" is not a valid command.
13:39	<alkisg> !nat
13:39	<ltsp> nat: To set up NAT on your LTSP server, see: https://help.ubuntu.com/community/UbuntuLTSP/ThinClientHowtoNAT
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13:40	<edwin> I just did that
13:42	I have internet n the thin client but not for local apps
13:42	thats the problem
13:45	<\|\|cw> edwin: so if you open the local console you can ping a server on the internet?
13:46	<edwin> yes sr
13:46	<\|\|cw> but local chrome doens't.
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13:46	<edwin> exactly
13:46	<\|\|cw> you have a firewall issue then.
13:46	or, you are mistaking about your local console test
13:46	<edwin> how do I open a local console
13:47	<\|\|cw> ctrl-alt-F2
13:47	<edwin> one sec
13:47	<\|\|cw> then you just open a terminal in the GUI, you are running the terminal on the server, not the client
13:47	then/when/
13:48	<edwin> got it
13:48	I am updating image to allow a shell
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13:52	<edwin_> loading
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14:03	<edwin_> ok I tried to ping google.com from local shell
14:03	got nothing
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14:03	<cbai> hello
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14:04	<cbai> someone can help me?
14:06	<edwin_> local firefox no internet connection any help
14:09	<cbai> mount /dev/nbd0 on /root failed: invalid argument and begin: setting up nbd-client ... error: socket failed: after working 40 thin/fat clients
14:12	<bennabiy> Does nbd have a limit set on how many connections?
14:15	<cbai> i don't know. where I can find it?
14:15	<\|\|cw> could be an open files limit as well
14:16	<cbai> i have to do sudo service nbd-server restart in order to allow login again
14:17	that occurs somewhere working 40 o 50 clients.
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14:17	<\|\|cw> if the # clients varies, it's almost certainly an open files limit
14:18	if you have thin clients, there's a lot more open file per user than with normal server workloads, so the default limit might not be big enough
14:19	http://stackoverflow.com/questions/34588/how-do-i-change-the-number-of-open-files-limit-in-linux
14:19	1024 seems to be the default
14:22	hm, seems I increased that to 16382 on my file server, and I don't remember doing it, so I wonder if something else added it, like samba
14:29	<cbai> it's working on an i7 with 32GB ram and SDD disk. All are flat clients with localapps working (firefox, chromium, scratch, stellarium, celestia, librecad). From 20 to 70 clients not all at time. Works fine 1 2 or 3 hours and then the next client that tries to login has this error, and noone can login again
14:29	sorry for my english.
14:30	which limit you recomends?
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14:53	<cbai> Thank you to all for your helps. Really thank's !!
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14:59	<cliebow> jammcq:same old sh!%..fixing broken macs
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15:18	<tfdl> good morning <ltsp> gentlemen,
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15:19	<bennabiy> Hello!
15:19	<edwin_> hey guys
15:19	is it recommended to run browsers as local apps?
15:19	on thin clients
15:23	<tfdl> i have a php program to communicate with a serial port on thin client machines. But when i run this php web application on a firefox on a thin client machine and try to communicate, the communication just go to server's serial port. I would like the communication to goes to the serial port of the thin client. how can i accomplish this, please?
15:27	hey <edwin_> i am new to ltsp too, but in my project here we run the firefox as local apps it seems to be better, it puts less load/netowrk communication/traffic on the server by monitoring the server we see that, but we have 2 gig of ram on the thin client, i am not sure how big is your ram on the client to share the load with the server.
15:32	<edwin_> thanks man
15:32	I have a 512 mb test guy here
15:33	<tfdl> oh that is low
15:33	<edwin_> I see that the browsing experience is kind of e
15:33	it works but people might complaint in a internet cafe place
15:33	hehehehe
15:33	how is your experience in youtube?
15:34	<tfdl> when i asked the your same question <alkisg> asked me what ram i have? that was his first question.
15:34	<jammcq> cliebow: bts is coming soon
15:34	ogra_: ping
15:34	<ogra_> jammcq, no, i havent booked a flight yet :)
15:34	<jammcq> :)
15:34	<ogra_> jammcq, but i'll surely do
15:35	i have one issue though
15:35	<jammcq> oh?
15:35	<\|\|cw> tfdl: you need some sort of serial over TCP setup so that the web server host can access the thin clients serial ports
15:35	<ogra_> my ESTA is expired ... and there will be nobody apprving it until your republicans move a bit
15:35	<tfdl> <edwin_> on a 2 ram youtube was smooth as normal on my workstation. very good .... no issue at all.
15:35	<jammcq> oh jeez
15:35	<ogra_> i.e. i cant get my visa waiver
15:35	<jammcq> a victim of the govt shutdown
15:36	<edwin_> <tfdl> was the price for a 2GB ?
15:36	<jammcq> maybe there won't be any immigration people at the airport to worry about :)
15:36	<ogra_> jammcq, yeah, i know some european companies that host certificates at gov.us ...
15:36	pretty screwed ....
15:37	<tfdl> <\|\|cw> yes, i got that working. but i just can not apply to the thin clients. my php webapps work for the thin server already.
15:38	<\|\|cw> I'm not following the problem
15:39	you add a service to the thin image. you use dhcp/dns to set a static IP lease, you config the web server to map the ports.
15:39	what's not working?
15:40	<tfdl> <\|\|cw> i think you dont understand me, sorry for my english, there is a php library to communicate with serial port, that i got working just fine on a thin server. but when i try to do the same on thin client the communication keep going back to the server. (what i try to do is sending hex data to serial port on each thin client machine via a php web application)
15:40	<\|\|cw> I'm still not getting the whole picture.
15:41	you're running a web server on each thin client?
15:41	<tfdl> ok please let me start again.
15:41	i have a webapplication in php to communicate with serial port (to send a hex data string to serial port)
15:42	using firefox on the thin server load this webapp i successfully communicate with the serial port (sending hex successfully)
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15:43	<\|\|cw> so, firefox opening the IP of the thin client...
15:43	<tfdl> but, when i go to the thin client machine do the same by open firefox load the webapp and the communication or hex data keep sending to the thin server's serial port and not the thin client's serial port.
15:45	you got the background of it <\|\|cw>?
15:46	<\|\|cw> no. I don't understand what you are connecting firefox TO. are you connecting to the think client's IP?
15:46	or "localhost"?
15:46	firefox is irrelevant, the URL you use is all that matters.
15:47	I also don't understand where the webapp lives
15:47	<tfdl> <\|\|cw> ah, the url is apache host webapplication for example www.ucalgary.ca/myapp/, in a very short form of question, how can communicate with the thin client's serial port?
15:47	<\|\|cw> your english is fine, I just don't think you're using enough words. major details are not there.
15:48	this is still not enough information
15:48	which system does www.ucalgary.ca/myapp/ run on?
15:48	the ltsp server?
15:48	some remote system?
15:48	<tfdl> in our project, we use ltsp thin client to display a webpage/weapp.
15:49	<\|\|cw> maybe I'm looking at the problem different than you.
15:49	<tfdl> no, my webapplication does not run on ltsp
15:49	<\|\|cw> lets pretend we're not using LTSP.
15:49	thin clients, once booted, are just normal computers, running a minimal OS
15:50	<tfdl> ok
15:50	<\|\|cw> except, you are using a form of vnc or rdesktop (not exactly, but for arguments sake..)
15:50	<tfdl> so my question is how can we communicate with the thin client machine's serial port <\|\|cw>?
15:51	<\|\|cw> so, you can run firefox via the remote control system, or you can run firefox as a localapp
15:51	localapp would be the same as using any old common desktop computer
15:51	so now, if you're using a traditional desktop, how, using the webapp, would you access the serial port?
15:52	on the dekstop.
15:52	<tfdl> i have my ff as local app.
15:53	<\|\|cw> so this is the same using a traditional desktop
15:53	how would you make that work?
15:54	<tfdl> to answer your question, i will just send a command to output some string / hex data to /dev/ttyS0?
15:54	<\|\|cw> from the web app?
15:54	<tfdl> yes
15:54	i got that working
15:54	<\|\|cw> would that not go to the web server's /dev/ttyS0?
15:55	<tfdl> no
15:55	you have really good question
15:55	<\|\|cw> wbe applications cannot access a users serial port without some form of signed plugin
15:55	<tfdl> very good question again.
15:55	<\|\|cw> or some sort of network server
15:56	<tfdl> hey, sorry
15:56	i just helped me understand
15:56	sorry i got it now
15:56	you just helped me understand
15:56	so the original answer to your question "would that not go to the web server's /dev/ttyS0?" is NO NO NO
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15:57	<edwin_> cannot load shockwave flash?
15:57	anyone running chrome local
15:57	<tfdl> <\|\|cw> in my test environment the the webapp server is on the same ltsp thin server.
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15:57	<\|\|cw> edwin_: did you also install flash local?
15:58	<edwin_> yes sir
15:58	<tfdl> no. not sure what flash for though
15:58	<\|\|cw> tfdl: so in that case, it does go to the web servers serial port
15:58	<tfdl> sorry that was for <edwin_>
15:58	<edwin_> adobe-flashplugin is already the newest version.
15:58	<tfdl> yes you are darn right <
15:58	<\|\|cw>
15:59	i confused you and myself. sorry
15:59	lol
15:59	please show me how to short it out <\|\|cw>?
16:00	"sort it out"
16:00	<edwin_> ltsp-chroot --> apt-get install adobe-flashplugin --> adobe-flashplugin is already the newest version.
16:01	<\|\|cw> well, you have 2 options. rewrite the web app so that it installed a signed java applet on the client that can talk to the serial port, or if the thin client IP's are accessible to the web server, use a tcp serial server to map them
16:02	edwin_: I've had similar issues with flash and chrome on normal desktops. I don't really recall the solution. maybe the installer put it in the wrong folder?
16:02	<tfdl> the second option: yes the is static and accessible by webapp, you have instruction for tcp serial server to map to serial port?
16:03	<edwin_> thats what I think because it says it is in /usr/lib/adobe...
16:03	other plugins are in /opt
16:06	<\|\|cw> tfdl: I've played with ser2net in the past, but I don't have anything I've used enough to actually recommend
16:07	edwin_: is this Chrome proper or chromium from the disto sources?
16:09	<tfdl> <\|\|cw> but you have stopped my confusion. If we just ignore this web application and serial thing. Can you please tell me how to send hexadecimal number to a serial port from a thin client machine, this will be even better solution?
16:09	<\|\|cw> you'd have to do it from a localapp
16:10	<tfdl> off hand you know what command i can use?
16:11	i am so weak in linux. spent days on google could not reallly send hexadecimal string to serial such as /dev/ttyS0
16:12	<jammcq> echo "FF" >/dev/ttyS0
16:12	<tfdl> <jammcq> trying ...
16:12	<jammcq> it really depends on what you mean by 'hexadecimal string'
16:15	<\|\|cw> if you need to send a series of specific bytes it probably better to use script or program.
16:15	just as python-serial
16:15	<tfdl> echo "FF" >/dev/ttyS0 does not work
16:15	<\|\|cw> or, since you have the php code already, install php-cli and make a php shell script
16:16	tfdl: that would send 2 ASCII F's
16:16	<tfdl> i echo different string such as 0xFE \xFE but no luck
16:16	<\|\|cw> you'd need to use echo's escape characters to get the right bytes, i don't don't the syntax offhand
16:17	a script would be better
16:17	<jammcq> /bin/echo -n -e "\xFE"
16:17	/bin/echo -n -e "\xFE" \| hd
16:17	that 2nd example will show you what it will send
16:17	<\|\|cw> you could even have the script, then use ssh auth keys and have the web server exec the command over ssh
16:18	then you woudlnt' need the serial server, just sshd
16:19	<tfdl> ok i am trying <jammcq> commands first to see what i get ...
16:21	<edwin_> \|\|cw\| hey bro sorry
16:21	chrome
16:23	<\|\|cw> edwin_: then the package installer probably won't work by default.
16:23	<tfdl> this is what happened like <\|\|cw> said: <\|\|cw> tfdl: that would send 2 ASCII F's
16:23	<jammcq> tfdl: /bin/echo -n -e "\xFE" will send only 8 bits
16:23	1 byte
16:24	<tfdl> it sent ascii i belive, because thi the ouput afte running: /bin/echo -n -e "\xFE" \| hd, i got 00000000 fe and 00000001
16:24	<edwin_> understand
16:24	any idea how
16:24	<jammcq> jam@jam:~$ /bin/echo -n -e "\xFE" \| hd
16:24	00000000 fe \|.\|
16:24	00000001
16:25	that's a single character
16:25	<tfdl> <jammcq> for what i need is to turn the light on and off via serial port so yes, 1byte is enough.
16:25	<jammcq> so try: /bin/echo -n -e "\xFE" >/dev/ttyS0
16:25	<tfdl> ok
16:25	trying
16:27	hey <jammcq> that works
16:27	it works, god
16:27	<jammcq> heh
16:27	now... can you turn the light off?
16:27	<tfdl> you did not tell me to pipe out > /dev/ttyS0 in the previous
16:27	trying ...
16:28	oh so beautiful!
16:28	with knowledge.
16:28	your knowledge!
16:28	<jammcq> some people are excited by the simplest things :)
16:28	<tfdl> here is how i do it.
16:29	<\|\|cw> jammcq: you should see when people get an led to blink in an Arduino class....
16:29	<tfdl> Einstein said it is better simple!
16:29	we dont simplify it but it is just simple!
16:30	<cliebow> !seen sbalneav
16:30	<ltsp> sbalneav was last seen in #ltsp 12 weeks, 2 days, 1 hour, 46 minutes, and 0 seconds ago: <sbalneav> Cool. But you're coming up for ltsp hackfest, is the rumour.
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16:31	<tfdl> <jammcq> but let me sum it up for record here
16:31	<jammcq> cliebow: BTS starts oct 31, you in?
16:32	<cliebow> jammcq: i ll be around for what it s worth..looking forward to seeing everyone
16:32	<tfdl> first command /bin/echo -n -e "\xFE" >/dev/ttyS0 (to initialize i think) the second /bin/echo -n -e "\x01" >/dev/ttyS0 (to make a switch)
16:33	<jammcq> tfdl: very cool
16:33	cliebow: too late in the season for a boat ride?
16:33	<cliebow> This place has gone over to the dark side completely..cant swing a dead cat without hitting a dead ipad
16:34	<jammcq> :)
16:34	try swinging the dead iPads
16:34	<cliebow> jammcq:yeah pretty sure she ll be covered up..i ll keep it in mind though..
16:34	the kids are doing enough of that
16:34	i got one crackerjack tech here who d like to participate in some form..
16:35	writes some c python .net
16:35	running a raspberry pi
16:36	<jammcq> cliebow: bring him along, he can't beat the price of admission
16:36	<cliebow> heheh..I ll add hime to the wiki if i can remember how
16:44	<tfdl> thank you <jammcq> <\|\|wc> and ltsp.
16:57	<cliebow> tfdl: took me a week to figure out ltsp is an automated user 8~)
17:09	<bennabiy> heh
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19:08	<IAFP> good afternoon ... service nfs-kernel-server does not start
19:09	not starting NFS kernel daemon: no exports
19:12	<jammcq> IAFP sounds like you either don't have a /etc/exports file, or it's empty
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19:22	<willianmazzardo> work_alkisg hi !
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19:29	<IAFP> jammcq That's right ... and created the file exportation and it worked!! but now ta saying no response from server, restarting
19:31	* vagrantc waves to jammcq
19:31	<jammcq> vagrantc: HEY !
19:32	<vagrantc> sounds like ssh keys aren't updated
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19:32	<edwin__> hello everyone
19:32	issue here
19:33	I cannot watch videos on youtube with local chrome or firefox
19:33	flash issues
19:34	<jammcq> vagrantc: what time do you arrive in portland?
19:34	<vagrantc> that's pretty common for thin clients
19:34	<edwin__> ubuntu 12.10 32 bits is my distro
19:34	<vagrantc> jammcq: was just writing you an email
19:35	<edwin__> is there a solution?
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19:36	<vagrantc> edwin__: fatclients or localapps
19:36	<edwin__> I am using localapps
19:36	there is where I have the problem
19:37	ltsp-localapps firefox
19:37	go to youtube , nothing
19:37	the black screen only
19:38	have installed adobe-flashplugin flashplugin-installer, flashplugin-extrasound or some
19:38	notin
19:39	<vagrantc> fatclients might be easier to get working
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19:42	<willianmazzardo> hi all … there is any way to make /home LOCAL in fat clients?
19:45	<IAFP> por que, quando se fecha uma sessao ele demora a habilitar outra? ele nao e multi -usuario ?
19:45	why, when closing a session it takes to enable another? it is not Multi-User?
19:45	<willianmazzardo> IAFP, explique-se ;) ( explain yourself )
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19:49	<alkisg> Hi willianmazzardo, when you see work_alkisg, don't ping him, he never responds... :D
19:49	<willianmazzardo> ehehehehe
19:49	i thought was you working :D
19:49	I dindt found you
19:49	<alkisg> It basically means "at work but away from keyboard": )
19:49	<jammcq> yes, alkisg is MUCH friendlier than work_alkisg
19:49	<willianmazzardo> asufhausefh
19:49	<alkisg> :)
19:49	<willianmazzardo> alkisg, pvt?
19:49	can you?
19:50	* alkisg is jealous of all the guys going to BTS...
19:50	<alkisg> willianmazzardo: sure
19:51	<vagrantc> alkisg: you just have to bring us to you next year, as promised :)
19:51	<IAFP> acabei de subir um cliente, porem nao logava dava msg: servidor nao respondendo....reiniciando
19:52	agora nao ta mais achando o dhcp
19:52	<alkisg> vagrantc: do bring that up with the other folks at the BTS, and if most of you agree, I can surely arrange it!
19:52	<IAFP> no filename ...e nem carrega
19:53	<edwin__> does anyone has thin clients working with youtube with no issue
19:53	?
19:54	<alkisg> !youtube
19:54	<ltsp> Error: "youtube" is not a valid command.
19:54	<alkisg> !flash
19:54	<ltsp> flash: Yes, flash sucks. An HD full screen 30 fps video needs 2.5 Gbps bandwidth (1920×1080×4×30)! Make sure you have LDM_DIRECTX=True in your lts.conf file, or if it's just youtube you're after, try some flash replacing plugin like http://linterna-magica.nongnu.org
19:54	<edwin__> sorry
19:54	let me try that
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20:13	<bennabiy> my youtube works great
20:13	* bennabiy grins
20:15	<bennabiy> of course, I am not watching HD full screen 30 fps videos
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