/srv/irclogs.ubuntu.com/2015/02/12/#lubuntu.txt

=== idleone__ is now known as io
bulwI changed my file browser using “Default applications for LXSession” in Lubuntu 14.04. Unfortunately, I did domething wrong as now after login I see only a blank grey screen. How can I reset this settings? I already tried restoring ~/.config, ~/.local and /usr/share/lxsession from backup and it failed to fix problem.09:29
bulwHow can I reset system setting in Lubuntu? I did something wrong and I am unable to do anything after login (a gray screen with mouse, not respsnding to anything). I already tried restoring ~/.config, ~/.local and /usr/share/lxsession from backup and it failed to fix problem.09:34
johnnydaveyeow lubuntu09:57
bulw Is there some way to reset system settings, except reinstalling system?10:00
bulwersatorI used lxsession-default-apps to modify my file menager on lubuntu 14.04. Now after login I have a blank grey screen, though start menu is accessible by right-clicking on it. My system is now referred to as debian, and running lxsession-default-apps is impossible as it crashes immediately. How can I reset settings changed by lxsession-default-apps?10:30
=== idleone_ is now known as io
xtromhi16:35
xtromi was wondering about lubuntu16:36
xtromand what is the main difference with debin16:36
xtromdebian16:36
holsteintry it live.. its free to try16:36
xtrom?16:36
holsteindebian is what it is.. and ubuntu is basically a fork of debian16:37
holsteinlubuntu is ubuntu16:37
holstein!lubuntu16:37
ubottulubuntu is Ubuntu with LXDE instead of !GNOME as desktop environment, which makes it extremely lightweight. See https://wiki.ubuntu.com/Lubuntu - /join #lubuntu for lubuntu support.16:37
xtromand when you say a fork16:37
xtromit measn that less powerful ?16:37
holsteinxtrom: "powerful" in most cases will be a matter of application,a nd configuration16:38
holsteinxtrom: fact: lubuntu is designed, as stated, for older hardware16:38
holsteinits meant to be lightweight16:38
holsteinyou wont find much better at that task16:38
holsteinit will not make your computer any faster or better16:39
xtromyes agree i jsut did a virtual machine16:39
xtromand is great16:39
holsteinthe "powerful" ness of your hardware will come from it16:39
holsteinthe actual hardware16:39
holsteinlinux is linux.. and lubuntu is not magic16:39
xtromi was wondering about using it (lubuntu) as a server ... since is so light16:39
xtrom?16:39
holstein!server16:39
ubottuUbuntu Server Edition is a release of Ubuntu designed especially for server environments, including a server specific !kernel and no !GUI. The install CD contains many server applications. Current !LTS version is !Trusty (Trusty Tahr 14.04) - More info: http://www.ubuntu.com/products/whatisubuntu/serveredition - Guide: https://help.ubuntu.com/14.04/serverguide - Support in #ubuntu-server16:39
holsteinuse it for what you want to use it for16:39
holsteinmostly, servers dont have, or need X, so, there is typically no desktop environment16:40
holsteinbut, lxde is a light option, if one wanted/needed one.. or wanted to run a server and a desktop on the same machine16:40
geniiWhen a server absolutely has to have some desktop for whatever reason, I usually just put twm and an xinitrc of like twm & xterm &16:42
holsteinyeah, there are lighter than lxde, for sure16:43
xtromtwm , xinitric ? i 've never hear of those16:43
holsteindepends on the goal16:43
xtromlet me google them up16:43
geniixtrom: twm is very very minimal. xinitrx is a file in home dir that tells what to do when X starts16:44
geniixinitrc, rather16:44
xtromim an electronic engineer , i am leaving windows behind , i started 5 month ago moving to linux , i tried Scientific linux for ahile,.. but i found it very diffciult,.. i tried then ubuntu server but i found it two cluttered and somewhat heavy16:47
wxltoo cluttered? and heavy? how do you quantify that?16:47
geniiWhat?16:47
xtromso i started with lubuntu ,.. i like the lightness16:47
holsteinif you want a desktop machine that you want to run server applications on, lubuntu/lxde is not a bad option16:48
wxli mean the fact of the matter is, lubuntu *IS* ubuntu16:48
wxlthey have the same core16:48
wxlall the packages come from the same place16:48
geniiAll *buntu underneath, yep16:48
xtromi am so glad to hear these16:48
holsteinubuntu server has no UI16:48
annabel_xtrom: considering installing OSX?16:48
holsteini think you mean, you tried main ubuntu.. as a server platform16:48
annabel_*consiered16:48
xtromosx ?16:48
xtromlet me google that16:49
annabel_Apple OSX16:49
xtromoh16:49
wxlholstein: THAT would make sense16:49
xtromno16:49
xtromi need open source16:49
wxlyeah, if you use standard ubuntu it *IS* cluttered and heavy16:49
holsteinappleOSX is not something i would run as a server, unless it were the server version16:49
wxlbut ubuntu server is pretty stripped down outside of the additional server packages16:49
annabel_i run debian on both my servers16:50
annabel_you can throw xlde / xfce on debian16:50
holsteinsure16:51
holsteinyou can run the *same* services on debian as ubuntu16:51
xtromxlde on debian would be as fast as lubuntu ?16:51
wxlxtrom: it would be good to explain what it is you actually want to accomplish, what your hardware is like, and further qualify your ubuntu experience. then maybe we can help guide you. even still, there is no *ONE* answer. this is totally subjective. the best way to figure it out is to get a live cd and boot it. then you can make a decision.16:51
annabel_Faster i imagine16:51
holsteinxtrom: *nothing* is going to make your machine faster16:51
holsteinit is what it is16:51
xtromok16:51
holsteinsoftware can make "better" use of resources16:52
wxli wouldn't say debian is faster than anythng in ubuntu16:52
holsteinlxde is lxde.. here, or on debian, or *whatever*16:52
xtromim a C programmer and embedde system16:52
wxldebian is upstream ubuntu16:52
xtromcurrently im started with Erlang16:52
wxlin that sense, they're very closely tied16:52
xtromand im gettin involved in real time application16:52
holsteintypically, the "best" option is the one that is best known to you16:52
holsteini say, choose one, and get comfortable with it16:52
xtromso my bos told to go for linux experience16:52
holsteinubuntu is debian based, so, anything you do here, in lubuntu/ubuntu will and can apply to debian16:53
wxlif you want to be REALLY fast, then you build your own linux from scratch using only what you want16:53
annabel_holstein's advice is good advice16:53
wxlbut if you find scientific difficult, that will be difficult16:53
genii!LFS16:53
ubottuLFS is Linux From Scratch (www.linuxfromscratch.org) - not to be confused with !LTS, which is the long term support release of Ubuntu (currently 8.04 (server), 10.04 and 12.04)16:53
wxllubuntu is a wonderful blend of simplicity and easy of use16:53
holsteinif you want to learn linux, there are many courses on it https://linuxacademy.com/16:54
wxlgenii: oh wow, that's cool. back in my days of building linux from scratch they didn't make it so easy XD16:54
holsteinotherwise, just grab an iso, and start reading, and learning16:54
wxlxtrom: there are real time kernels available16:54
geniiwxl: I usually recommend it to people to do at least one time in their life if they want to learn about how linux distributions are made, etc16:55
holsteinanything like linux from scratch will also be applicable16:57
holsteinthe deal is, just being open to relearning16:57
holsteinand not expecting linux to be windows16:57
holsteinmost folks slowly learn to use windows over years and years of time.. becoming advanced users quite knowlegable with the system. then, they drop linux on a box, or in VM, and expect to have that same level of mastery in a few minutes time16:58
wxlxtrom: any other questions?16:58
holsteinkeeping in mind that its not a goal of linux to emulate windows, and being open to re-learning how things are done will help16:58
xtromi pick lubuntu becasue its simpleness ,.. so a can learn to swim in linux,.. but actually i need to go for RTOS ,.. i saw some linux RTOS  in wikipedia , and i was reading about xenomai framework that supposedly converts any linux in a rtos ..16:59
wxlxtrom: as i said, there is a real time kernel available16:59
holsteini dont think you do16:59
holsteinbut, only you can sort out your specific needs.. and are totally free and welcome to do so17:00
wxlholstein: it's for embedded programming. think drones.17:00
wxlas a general rule, controlling those motors requires real time17:00
holstein*great*!17:00
wxlalthough i know of at least one project that got around it somehow17:00
holsteinbut, we know you dont need a special version of linux for that17:00
holsteinunless one does.. which, one can17:01
wxlright17:01
holsteinthere are *many* RT kernels17:01
wxllike i said there's the real time kernels :)17:01
xtromwxl : which real time kernel you suggest to easy start (easy installation , lost of help and documentations ,.. etc )17:01
holsteini say, ignore that, and just get started learning literally anything about the core17:01
wxl!rt | xtrom17:01
ubottuxtrom: The RT kernel is the Ubuntu kernel with a realtime preemption patch applied. It is included in Ubuntu Studio by default. For more information please see: https://wiki.ubuntu.com/RealTime/17:01
wxlthere ya go17:01
holsteini say, use the stock server kernel17:01
holsteinanything there will meet most of anyones needs17:01
holsteinthen, if you find you need more, you can learn to implement it17:01
wxlholstein: except for certain embedded programming needs. he's definitely got a unique use case.17:02
holsteini am in no way disagreeing17:02
holsteinim just saying, there is *no* need to do it now17:02
holsteinno need to learn how to implement a special kernel *before* learning the os.. for a need that is not happening yet17:02
wxlcertainly not to learn linux17:02
holsteini would suggest installing stock ubuntu server, or another stock linux distro.. stay on the stock path of that distro for support, and documentation17:03
wxland frankly i wouldn't suggest server from what i'm hearing17:03
wxli'd say start with lubuntu17:03
wxlyou'll probably want that gui17:03
holsteini think thats more like windows server17:03
holsteina GUI..17:04
wxlwell i don't even think he was using server17:04
wxlscientific linux is gui based17:04
wxland he found it difficult17:04
holsteinim sure im mis-reading the scroll back17:04
diffisScientific linux... What does it actually mean in this case?17:05
wxldiffis: it's a red hat derivative created by cern17:05
wxlthe name is kind of a misnomer17:05
wxlsorry fermi not cern17:06
wxlcern did help17:06
wxlbut now they're on centos proper17:06
diffiswxl: Ah, OK. I was a bit confused, because there are a lot of ways you could say 'scientific linux'. :D17:06
wxlhttps://en.wikipedia.org/wiki/Scientific_Linux17:07
diffisFor example, I have just Lubuntu desktop what I use quite heavy computing purposes.17:07
wxlyep i can relate to that17:07
diffisAnd I'm planning to upgrade my computer to be able to do much more.17:07
wxlyou can find out the why and what here https://www.scientificlinux.org/about/why-make-scientific-linux/17:08
xtromi chose in the pas SL6. becasue since i know they (cern,fermi, etc) use it i thought it (SL) might have easy step for RT apps development17:08
xtromthats what i encountered difficult not the SL it self17:09
diffisHmm... I think I've taken a look there at some point but then I decided to stay in lubuntu or some other light flavour (not necessarily ubuntu's).17:09
xtromthat wasnt the case17:09
xtromwxl : waht do you think about xenomai..17:14
xtrom?17:14
xtromwxl : rt in wikipedia says "inactive" http://en.wikipedia.org/wiki/List_of_real-time_operating_systems17:16
holsteinif you need what its implementing, go for it17:16
holsteinyou wont waste time, again, learning a gerneral linux operating system17:16
holsteinlinux from scratch.. etc17:16
holsteinif you have a special application or need, you'll just need to do what that requires17:17
holsteinyou may need to have your "boss" get you sample hardware, and try the software on the hardware, and test it17:17
holsteinor, just go with one of the services that will do it all for you, or sell you an entire linux solution17:18
wxlxtrom: your resource for all things ubuntu is the ubuntu wiki, not wikipedia17:25
wxl!rt | xtrom17:25
ubottuxtrom: The RT kernel is the Ubuntu kernel with a realtime preemption patch applied. It is included in Ubuntu Studio by default. For more information please see: https://wiki.ubuntu.com/RealTime/17:25
xtromwe going to be using ARM cores (for hardware) but we ( my boss and i ) suggested that i would be better if i learn linux for comons MPU , and then pass to embedded server systems (Real time)17:25
xtromso so far lubuntu is pretty fine17:25
holsteinright17:25
xtromim learing alot with it17:25
xtromthank you holstein for your suggestions17:25
xtromi think you are tight17:25
xtromright*17:26
xtrom:)17:26
wxlxtrom: the better info is here https://help.ubuntu.com/community/UbuntuStudio/RealTimeKernel17:26
holsteinthough, our kernel was not designed for that17:27
holsteinand, is not in the default repos any longer17:27
wxlbasically you install a ppa (add a repo), and then install the package you want17:27
holsteinthe lowlatency is..17:27
holsteini say, dont worry with the kernel, til it becomes a problem..17:27
holsteinif its already a problem, then start testing kernels17:28
holsteinthe kxstudio ppa has realtime kernels17:28
holsteinbut, those kernels are more intended for audio production work17:28
holsteinagain, no software makes your hardware any "better".. its just a way to help configure it to make better, or more appropriate use of resources to fit the need17:29
wxltl;dr xtrom install lubuntu and get back to us based on what else you need17:30
xtromexcellent!17:36
xtromthank you , you all are awesome,.. nice community !17:36
jiridoholstein: Hi. Hope you are well and life is smoth with you. I got a ubuntu quis but you know how it is in the channel so i ask you cause i know you know much.19:25
jiridoWhen using sshfs to mount a remote / as a remote nonadmin user on the server but with sudo rights, (it's ubuntu so i cant do it as root and dont want to) is there a way to get a password promt to pop up asking for my remote users password(sudo) when i try to save an root owned file i have modified in a local editor or if i want to upload a file as root to a root owned directory?19:26
jiridoand now im talking open files in leafpad via pcmanfm19:26
ianorlinjirido you are running the pcmanfm on your local machine right19:31
jiridoyes19:32
ianorlinjirido, I am not sure how to do that19:32
jiridoianorlin: sadly19:32
jiridoIt would be so neat19:32
ianorlinbut you could sftp to the users home and then move it with sudo with ssh if you can figure out the mv command19:32
ianorlinor an admin can19:33
jiridoI have sudo and so on and can edit it in nano or vim but i prefere to look for files in filemanager and edit them in sublime or leafpad19:34
ianorlinmy idea is to save locally copy to your home folder in server and then ssh to sever and cp it to where you want to19:35
ianorlinif this is a config file or something having a backup is nice19:35
jiridoBut when saving anything outside my server users homefolder it denyes me to save and then it would be so neat to get a popup asking for my pasword(sudo)19:36
ianorlinyeah because your user doesn't have write permission there19:37
jiridoyes but it is hmm19:37
jiridoi would like to solve it.. I do not know if i could do it with ldap eventually but it seames like yet an other thing to learn and setup that is cind of big and complicated19:38
jirido:)19:39

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