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Showing posts from February, 2013

Thread: Ubuntu One Music store missing from Rhythmbox

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launched rhythmbox today, , had planned on purchasing album through it/ubuntu 1 music store, it's not there on left select had been recently. know how can back? posted betterhands but it's not there on left select had been recently. when recently, mean previous version of ubuntu? in rhythmbox there no ubuntu 1 music store. Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [SOLVED] Ubuntu One Music store missing from Rhythmbox Ubuntu

Can't type in InDesign at all!

whenever try use type tool, makes 22" x 22" box , no characters show when type. have tried starting new document automatic text box, not let me type in box. please help! something pretty wrong. os? version of id? patched latest update?   did work before? if so, have changed since?   have tried trashing prefs? see replace preferences More discussions in InDesign adobe

When will the releases announced at NAB be available

i start series of tv commercials , think time make jump fcp. been told peers have seen @ nab not yet available. when available?   thanks. we not sure, told in nab our latest premiere pro cs6 & after effects cs6 give different experience altogether.   here go, can check yourself.   http://www.adobe.com/in/products/premiere.html   http://www.adobe.com/in/products/aftereffects.html More discussions in Premiere Pro CC adobe

LR HTML Web Gallery -- modified version with great features is available

for using default lightroom html web gallery, 1 of our associates here has offered modified version great added features.   john beardsworth's site -- lightroom solutions - http://lightroomsolutions.com/ -- wonderful resource lr tips, plug-ins, information, etc.    the default html gallery fine, found lacked features.  mentioned ian lyons ( http://www.computer-darkroom.com/ ) couple of years ago, , sent me modified version ability specify 100 rows using sliders instead of grid.  when tried john's modified version, had other features.  thought.... if 2 modified versions combined?  so, shot john email, , low , behold, uploaded new version of gallery site.  thank you, ian , john!   here link: http://lightroomsolutions.com/my-tweaked-built-in-html-gallery/   here added features find useful:   number of rows (up 100) , columns can specified using sliders rather grid thumbnail images can sized specification filename can placed on each thumbnail, , specify size of text clicking large

Thread: Accessing server using IP

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hello everyone, installed ubuntu server @ home , have lamp component in. connected web , able install webmin. in addition installation, did following: ip address is: ip address 172.19.0.10 sudo vi /etc/network/interfaces # primary network interface auto eth0 iface eth0 inet static address 172.19.0.10 netmask 255.255.255.0 network 172.19.0.0 broadcast 172.19.0.255 gateway 172.19.0.1 able access index.html found in /etc/www when w3m http://localhost . able access using static ip: http://172.19.0.10 not able access site http://172.19.0.10 off laptop (from home). once can access site both internal , external computers, can start working on webmin configs. posted brizvi hello everyone, installed ubuntu server @ home , have lamp component in. connected web , able install webmin. in addition installation, did following: ip address is:

Error 404 when logging in on front-end login module - Joomla! Forum - community, help and support

hi, i added login module on site. when try login 404 error. i have following seo options enabled: - search engine friendly url's - use url rewriting when disable (set no) these 2 settings can login , not 404 error. all pages working fine (if not logged on of course), except redirect. it multi-language site. how can solved? thanks in advance, martin https://docs.joomla.org/enabling_search_engine_friendly_(sef)_urls Board index Joomla! 3.x - Ask Support Questions Here Administration Joomla! 3.x

Intel RTS2011LC CPU cooler -- quieter alternatives?

as far can tell, cooler far biggest source of noise in system - @ least when load ramps up.   anyone else experience this?  or care suggest alternatives?  noctua dh14 rated @ under 20db -- ought near silent? -- it's bigger unit, there might clearance issues. http://www.newegg.com/product/product.aspx?item=n82e16835103099 might work More discussions in Hardware Forum adobe

YouTube 10 Min. Duration Limit

for time, youtube imposed 10 min. duration limit files being uploaded. direct upload youtube function in pre 11 still has limit. because youtube extended accounts not in place, when pre 11 written. pre 12 allow extended youtube accounts, no 1 knows yet. unfortunately, youtube's requirements , restrictions "moving target," , when changes made after software version has been written, workaround necessary.   in meantime, 1 can publish+share file on computer, youtube preset, , manually upload longer duration file, through extended youtube account. while not quite convenient, direct upload, allows video file, more 10 mins.   for more information on publish+share youtube, see faq entry: http://forums.adobe.com/message/2759311#2759311   hope helps explain why 1 cannot upload longer duration file, directly youtube, though 1 has extended youtube account.   hunt More discussions in Premiere Elements Tips & Tricks adobe

Script error and IE10

i keep getting error message "a script in movie causing abode flash player run slowly. if continues run, computer may become unresponsive."   how fix this? not running movie. had awhile , stopped happening. continually happens , huge nuisance.   i not computer geek don't understand of answers have said. keep answer basic , give detailed instructions on how fix. that's reporting error on page browser loading, not error on system. More discussions in Using Flash Player adobe

Scale to frame question

i imported stills forgot uncheck "scale frame size"   so wondering if uncheck box,  use replace media function on each individual picture replace in project (using copies not original files), import unscaled?  did noticed each image properties on timeline has box checked (scaled frame size) select images on timeline, right click , deselect scale frame size. More discussions in Premiere Elements adobe

Thread: Keyboard shortcut for "application finder"

anybody knows how configure keyboard shortcut "application finder" in xubuntu? goto settings -> settings manager -> keyboard -> application shortcuts. click on "add" , enter xfce4-appfinder command. click "ok" , window pop-up prompting keyboard shortcut - press key combination want use. using key combination should bring application finder. Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [SOLVED] Keyboard shortcut for "application finder" Ubuntu

After upgrade "500 Application Instantiation Error" - Joomla! Forum - community, help and support

junpar wrote: brian wrote: there 1 correct way update joomla , using joomla update component. else fail run postinstall scripts essential. if didnt use component not lost michael babker wrote handy script out of trouble https://gist.github.com/mbabker/d7bfb4e ... 3607f89281 tried fix 3.75 ->3.8 upgrade whereby administrator access failed error http error 500 appearing. suggestions?? i have same problem "500application instantiation error" iam newbiee: how save site ? hi @footankle 1. have backup before update ( files , database)? 2. run http://forum.joomla.org/viewtopic.php?f=621&t=582860 , post result in next reply (remember, detete file after generating report). 3. joomla! version update? Board index Joomla! 3.x - Ask Support Questions Here Migrating and Upgrading to Joomla! 3.x

Thread: wifi connectivity issue 11.10 asus 1201n

hi folks, computer : asus 1201n ubuntu : 11.10 32bit desktop have annoying wifi problem not seem go away. (each time upgrade version of ubuntu comes right back) wifi connect wpa/wpa2 network. when not load webpages (the browser declares sites not responding fast enough). in last test when attempted connect wep -- not connect @ all, network manager attempted connect on , on , repeatedly asked me password. may worth noting trying share connection macbook has internet sharing turned on. have tested connection no password , not connect either. ipod touch connects no problem (to above networks) whats confusing me this: few months ago when running 11.04 downloaded , installed compatdrivers. blacklisted computers native mod "r8192se_pci"s , added compat mod "rtl8192se" /etc/modules. when run lsmod driver in use called "rtl812se" (which same name driver installed manually in 11.04) thought perhaps 11.10 not using native

Thread: Looking for a GBA emulator with link cable in ubuntu

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hello community ! i'm new forum although i've used ubuntu time , have seen old posts question have haven't found answer: there linux gba emulator link cable capabilities ? ! k. visualboy advance , vba-m have link functionality in windows. however, no port linux has been developed. theoretically can compile source windows working version , should solve problem. or @ least have found out after several hours of looking other alternatives. however, haven't been able compile reason. if can, let me know try else. Forum The Ubuntu Forum Community Ubuntu Specialised Support Gaming & Leisure Emulators Looking for a GBA emulator with link cable in ubuntu Ubuntu

Menu items dont work when SEF urls disabled - Joomla! Forum - community, help and support

hi. have strange problem. finishing site , works when sef urls enabled. when disable sef urls in configuration none of menu items works (except those, connected virtuemart). page this: http://prntscr.com/gl5ffm cleaned cache , everything. need disable sef urls able full links few things. strange. site is: http://69.89.31.176/~smrekovi/smrekovit-2017(1 )/ any idea? sef urls mod_rewrite may not work on temporary domain names (see viewtopic.php?f=712&t=954210&p=3490945#p3490945 ). Board index Joomla! 3.x - Ask Support Questions Here Extensions for Joomla! 3.x

Thread: PHP Without Webhost

is there way display php without webhost? i'm trying learn php, since learned html, , don't want need actual host, since need re-upload files every time want view them. can't clear tutorials apache server, how view php pages make on kubuntu without webhost? without apache or http-server not possible. recommend installing apache , php on system don't need upload files somewhere else. if remember correctly apache , php working out of box. put files /var/www , call them in web browser. Forum The Ubuntu Forum Community Ubuntu Specialised Support Development & Programming Programming Talk [SOLVED] PHP Without Webhost Ubuntu

Joomla native URL - Joomla! Forum - community, help and support

hi, have idea url come from? module or part of joomla creating this? creates duplicity of homepage me - language shorcut in url. index.php?option=com_content&lang=en&view=featured&itemid=464 i disable if possible. this second homepage url without language shorcut. index.php?option=com_content&catid=9&id=167&lang=en&view=article&itemid=522 weird thing language shorcut exists homepage. thank you do have multi language site? Board index Joomla! 3.x - Ask Support Questions Here Language - Joomla! 3.x

Desktop & Laptop (Different Question)

i have read , watched lot of information using laptop , desktop , limitations adobe has envoked in process??? anyway - mentioned before new lightroom , right int process of loading 12+ yaers of images , video in catalog located on desktop hard drive.   once loaded - want somehow use laptop go through each project , keyword inventory. what;s best way move/copy catalog form desltop laptop can - , when done, move back? when work in lr need 2 things: lr catalog , photos (image files). without catalog lr "knows" nothing photos, , without photos cannot work in develop module - can work in library module , - instance - add keywords and/or titles. see question marks on photo frames in grid view , "missing photo" message in loupe view - not make impossible add keywords, titles, captions, etc.   if want keywording on laptop, need lr catalog - and, naturally, lr installed on laptop. photos can remain wherever are. so have make catalog accessible laptop, , means catalog conta

Need help

how install creative cloud onto mac desktop osx10.5.8 when application seems need 10.6 , above? have wasted money? do? writterobbo61 need upgrade operating system on computer @ least 10.6 or later.  if not possible may want cancel subscription under account.  can find information on how accomplish @ http://forums.adobe.com/thread/1146459 . More discussions in Creative Cloud Download & Install adobe

Alias menu item direct access (by itemId) - Joomla! Forum - community, help and support

i have alias menu item linked site main page. when i've tried (just interest) check direct access menu item item id (mysite.com/?itemid=234, '234' id of alias menu item), saw weird instead of menu item should redirect... strange table list of acticles... correct , safety or i've broken anything? behavior observed in 2 menu items checked reliability before creating post. joomla! 3.7.2 what does index.php?option=com_content&view=article&id=234 display ? Board index Joomla! 3.x - Ask Support Questions Here Administration Joomla! 3.x

Automate Joomla Upgrade - Joomla! Forum - community, help and support

dear joomla community, i maintaining several joomla pages , wrote ansible scripts (configuration management tool) automatically set-up, configure , secure sites on server. also, can read-out latest version of joomla , inform user has upgrade. now, asking myself how best automatically update joomla in linux (via ansible). as far understand upgrade consists of 2 parts: a) update files b) update database my questions: 1) a) automatically checkout latest version via git (as of https://github.com/joomla/joomla-cms/tree/3.7.2 ). see disadvantages here compared pulling upgrade zip folder , overwrite files? find simpler using git repo maintain , git pull/checkout latest version. 2) joomla upgrade procedure in backend when comes upgrading database? there equivalent script can run (e.g. 1 in installation/sql/mysql/joomla.sql)? thanks lot feedback! willing share scripts if there interest. (joomla great, me computer scientist want automate , not rely on clicking in gui =) - , yes, want avoid jooml

Download files extension from client area - Joomla! Forum - community, help and support

hello all, i'm looking best plugin or component add site in order allow registered users download own files administrator uploading them time time. extension have feature inform ht euser when new file has been uploaded profile. user "a" can't see files user "b" each file private , cant shared. i appreciate recommendations! cheers! see community builder. it covers requirements. Board index Joomla! 3.x - Ask Support Questions Here Extensions for Joomla! 3.x

How to fix extremely slow render in AE CS6?

hi, we've upgraded cs4 cs6. a composition used need 9 minutes render, needs 2 hours now. ae updated , don´t use option "render multiple frame simultaneosly" we've tried delete different layers composition , way improve rendering time deleting wiggle expressions. if transform these expressions keyframes, render lasts hours. we need our wiggle expressions, how can solve problem? thank much! have checked render settings , render codec? kind of system running? tell more system. of codecs have changed. cs6 has new render engine. know how use it? system specs cs6? how memory?  please let know more can you. More discussions in After Effects adobe

publicacion articulos por fecha y hora - Joomla! Forum - community, help and support

hola el otro dia al entrar al end de mi web joomla me llego la actualizacion de joomla 3.7 y procedir instalar. el idioma de mi web es en catalan cosa que despues de actulizarla me actualizo el idioma en catalan tambien. el problema es que cuando creo un articulo y le digo que me lo publique en una fecha y hora determinada me dice que los parametros no son correctos y no me lo publica. solo me deja publicarlos si al entrar al administrador le cambio el idioma al ingles o al español que puede ser jomdir wrote: solo me deja publicarlos si al entrar al administrador le cambio el idioma al ingles o al español que puede ser hay paquete actualizado de catalán? puede que sea eso. me parece extraño que al programar un artículo solo te lo permita en esos idiomas y no en catalán. te funciona también si configuras el artículo en la opción "todos" los idiomas Board index Joomla! International Language Support International Zone

Problem with CS4

i have been using cs4 years , pictures have green hue without modification.  can please? this may sound basic, check monitor cable , connections.  i've had happen when connector got loose; apparently 1 of signal lines first thing disconnect.   if it's not on display that's gone wonky, images inside photoshop, have done (or downloaded os updates) have affected monitor profile that's associated display @ operating system level?   it might idea describe system (os version, video card, monitor model, how it's hooked up, etc.) more specific suggestions.   -noel More discussions in Photoshop General Discussion adobe

Adobe Reader XI protected mode problem

i downloaded reader xi , went open pdf worked reader.  adobe reader xi won't open (says problem "protected mode").  can't open pdf's either on computer or on internet @ trusted sights.  troubleshooting takes me page on fixes reader x. not helpful!  ideas?  (i uninstalled , reinstalled , still won't work.) counyot,   thanks post ...   please disable protected mode .. please find below steps ":     disable protected mode going edit > preferences > general , deselecting enable protected mode @ startup .     restart reader.   you can refer below link more details :   http://helpx.adobe.com/acrobat/kb/protected-mode-troubleshooting-reader.html More discussions in Acrobat Reader adobe

collecting responses from interactive form

i have created interactive form combined additional pdf documents. when downloads doc our website , when submit form, form return or entire document?   also, need completed form returned. not want data collected  & put spreadsheet. confused options on adobe pro x & when read thru distribution options, none of them seem appropriate need. can advise? you better answers if ask in acrobat or forms central forums. More discussions in Acrobat Reader adobe

Delete index.php fom url - Joomla! Forum - community, help and support

hi guys, many questions lately. iэму been running site audit , noticed have index.php in structure of url. have fixed problem before making redirections still appears new pages post. have make separate redirections every new page separately? rename htaccess.txt .htaccess (if haven't done already), , then, in global configuration, ensure both "search engine friendly urls" , "use url rewriting" set "yes". Board index Joomla! 3.x - Ask Support Questions Here Search Engine Optimization (Joomla! SEO) in Joomla! 3.x

Thread: x2go, can only connect through Putty tunnel

i had been using freenx while, updated 11.04, , repository has not been updated that. took opportunity try out x2go. install went fine, i'm connecting win7 host machine. when i'm @ work have had set putty tunnel through work's firewall vnc/nx/x2go work, , works fine. when i'm @ home connect directly machine, not work. "maybe password wrong" error after attempts connect. if open tunnel (putty port local 22 port remote 22) @ home can connect fine machine. note i'm connecting putty through port 22 remote machine. auth.log looks ok, connect, accepts password. etc. in failing .x2go/<session name>/session.log output: nxagent - version 3.5.0 copyright (c) 2001, 2011 nomachine. see http://www.nomachine.com/ more information. info: agent running pid '9524'. session: starting session @ 'sun nov 20 11:58:51 2011'. info: proxy running in server mode pid '9524'. info: wai

Icons missing in editor - Joomla! Forum - community, help and support

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hi folks, weird 1 has come today, editor working fine yesterday, , thing have changed site adding www redirect htaccess. anyway... in article editor (and various other components), icons missing top editor bar. instead of icons bold, italic, justify etc, boxes. any idea might have happened @ all? apologies if has been asked already, @ work can't search long! thanks in advance iconbar.jpg i see jcomment hooks editor, try disable , recheck. think editor worked before, right? Board index Joomla! 3.x - Ask Support Questions Here Performance - Joomla! 3.x

Text box columns in InDesign rendering in reverse

hello!   when paste text text box in indesign more 1 column or thread text box, it's started rendering in reverse. not flipped, columns reading right left, not left right. i've accidentally changed setting somewhere, can't find change back!   er... help? it sounds text pasted had been used in right-to-left language setting (like hebrew or arabic). settings possible in indesign not built ui standard version (us english or european languages). if have template built in languages, keeps attributes of r2l.   is possible acquired text uses settings? More discussions in InDesign adobe

Display difference in Adobe and Nitro Readers.

hey guys, i have trouble display next pdf file ( can find here http://rghost.ru/45010381 ). displays same value in different fields adobe xi , nitro reader 3. populating used itextpdf.   p.s. see filled form[0].page2[0].describe[6], displays in form[0].page2[0].describe[4]. happen due index, happy if tell me how fixed.   thanks, denis. More discussions in PDF Forms adobe

Thread: The following packages were automatically installed and are no longer required:

hi! make history short! lost source.list file, create new one, following message when try install something following packages automatically installed , no longer required: code: plasma-dataengines-workspace kdesdk kdepim-runtime libprocessui4 libtaskmanager4 libqimageblitz4 kdebase-workspace kdesdk-kio-plugins python-levenshtein libkscreensaver5 libsolidcontrolifaces4 libsoprano-dev plasma-widgets-workspace kdebase-apps umbrello klipper python-lxml ksysguard libplasma-geolocation-interface4 kwrite libksgrd4 lokalize kdebase-workspace-bin krosspython libplasmagenericshell4 systemsettings libkfontinst4 kdm python-iniparse kinfocenter kdebase-workspace-data ksysguardd libplasmaclock4 python-enchant libweather-ion4 kdebase-workspace-kgreet-plugins poxml libsolidcontrol4 translate-toolkit kpartloader plasma-desktop pkg-kde-tools libksignalplotter4 plasma-widget-folderview liblsofui4 kdesdk-misc libplasma-applet-system-monito

Thread: Mysteries

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like lot of people running xubuntu, seems, the: code: ecryptfs_encrypt_page: error attempting write lower page; rc = [-28] ecryptfs_writepage: error encrypting page (upper index [0x000000000212c485]) messages, @ least in kern.log. not see them popups have been ignoring them - seems work ok. notice on last several nights, or mornings, @ 2am, kern.log has dozen or of such messages within 2 seconds, , there no more logging. have checked kern.log , syslog, , logging stops after flurry of ecryptfs messages. have script running netstat once minute, , @ time of ecryptfs messages, writes out slew of garbage - looks binary stuff, , no longer works. - script continues try run nestat, output file 0 length. same thing test email send once hour - after ecryptfs stuff, no longer works. guess pc locked in way, when come down in morning , type in password unlock screensaver, seems normal, , if @ kern.log, can see messages beginning again point. comments? while

404 error door automatisch toevoegen domein aan urls - Joomla! Forum - community, help and support

hallo, aan de urls van mijn site wordt automatisch nog eens het domein toegevoegd waardoor er voor de pagina's 404 errors komen bv. voor url http://www.skivakantie-zoeken.be/skivakantie-frankrijk wordt nog eens /skivakantie-zoeken.be toegevoegd waardoor de url http://www.skivakantie-zoeken.be/skivak ... -frankrijk wordt. dit resulteert uiteraard in een 404 error. heeft iemand enig idee hoe dit komt ? mijn pagina's zijn nu niet bereikbaar en heeft natuurlijk ook impact op page rankings ... ik ben een beetje hopeloos aan het worden .. alvast bedankt peter wat heb je bij: algemene instellingen - seo-instellingen - websitenaam in paginatitels toevoegen staan? dat het eerste waar ik aan denk Board index Joomla! International Language Support International Zone Dutch Forum Algemene vragen

Premiere Elements 11Crop/Zoom Effect Distorts Photo

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for many years have used crop/zoom function in premiere elements 7 create slow zoom on photos (image on left). when attempt in elements 11 photo distorted (image on right). attempted use new pan/zoom function doesn't work portrait oriented photos. ideas why version 11 applies function differently version 7? i have book written steve grissetti called "cool tricks , hot tips premier elements 11".  on page 40 says before bring photos , graphics premier elements should "uncheck" "scale frame size" option.   would try , see if fixes issue?    it useful book.  steve , crew writing it.   edit > preferences > general   bill s More discussions in Premiere Elements adobe

School portal using joomla - Joomla! Forum - community, help and support

hello gurus here, want build school portal using joomla. i'm still joomla beginner, i'm relatively @ designing website joomla. here's need. i want extension can accomplish this... i want situation student register filling registration form enable him type name , upload photo. then, unique id generated automatically him. he can login id. when logged in, can view school result on portal. this needs built scratch, need integrate joomla moodle , customize moodle accommodate needs. if it's displaying test results, suggest implement scratch instead of using moodle. Board index Joomla! 3.x - Ask Support Questions Here General Questions/New to Joomla! 3.x

Customisation Management Strategy (Comments please) - Joomla! Forum - community, help and support

my joomla installation based on core system number of extensions. i make modifications various parts of overall install don't want lock myself out of being able continue released updates. as haven't created extensions myself, other hello world example, appreciate feedback on approach i've been thinking about. basically, want create extension contains files , database schema changes need. each joomla/extension update released, check files have in extension against newly released versions , modify new ones perform tasks require. the main benefit see of allows me manage changes in organised way without letting situation out of control. can done using custom extensions? otherwise think git next best option. Board index Joomla! 3.x - Ask Support Questions Here Extensions for Joomla! 3.x

Flash player download, lack of download

i have gotten messages noting need have adobe flash player installed view file, or internet access. go through exercise of downloading. says has completed successfully. have restarted computer several times, , continue same problem. cannot access due needing download flash player.  my computer shows have version 11.6.602.180. continues act if not loaded @ all. have read of other posts of same issues, have not found similar root cause or correct yet. unable copy/paste onto forum show see. unable insert link or attachment forum. maybe unrelated.  what operating system & version?   what web browser?   you write "downloaded", did install it?   p.s. can attach screenshots using camera icon; links can inserted using simple paste. More discussions in Installing Flash Player adobe

Thread: Wireless Problem in my Lenovo Laptop

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dear all, i've bought lenovo b560 laptop broadcom 802.11n wireless adaptor .. i've installed ubuntu 11.10 linux on , see (enable wireless) option @ upper right corner of screen (near battery icon , data/time), it's dimmed option , message (wireless disabled hardware switch) !! can't scan wireless networks in range !! following package installed: bcmwl-kernel-source 5.100.82.38+bdcom-0ubuntu4 , (additional drivers), says adaptor ok , ready work, isn't case !! output of lcpsi is: code: 00:00.0 host bridge: intel corporation core processor dram controller (rev 02) 00:02.0 vga compatible controller: intel corporation core processor integrated graphics controller (rev 02) 00:16.0 communication controller: intel corporation 5 series/3400 series chipset heci controller (rev 06) 00:1a.0 usb controller: intel corporation 5 series/3400 series chipset usb2 enhanced host controller (rev 05) 00:1b.0 audio device: intel corporation 5 ser

Thread: Unable to locate the Javac Compiler

hey everyone, trying build dspace onto ubuntu linux. using handy instructions received, process has gone smoothly until point. receiving following error: unable locate javac compiler in: /usr/lib/jvm/java-6-openjdk/jre/../lib/tools.jar please ensure using jdk 1.4 or above and not jre (the com.sun.tools.javac.main class required). in cases can change location of java installation setting java_home environment variable. absolute beginner when comes linux. how resolve issue? thanks! Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [ubuntu] Unable to locate the Javac Compiler Ubuntu