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• "Progressive" JPEG: Why do many web sites avoid rendering JPEGs that way? Pros, cons?

  - by Chris W. Rea

  When JPEG images are used by a web page, they are typically rendered top-down ... but they can also be rendered using a mode called progressive JPEG, where the image starts out full-size, but blurry, and then gets sharper with successive passes, until it's fully loaded. Progressive loading requires the image have been saved that way. Why don't more web sites use progressive JPEG? What are the drawbacks? Is it simply a lack of tool support, or are these files somehow inferior to traditional top-down rendered JPEG images?

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• Ubuntu suddenly won't boot on a Mac

  - by emchristiansen

  I installed 11.10 in dual-boot mode following instructions here: https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation Everything worked fine, until I recently updated from Mac OS 10.6.x to the latest 10.6.x (this was a minor update prompted by OS X). The update made the rEFIt screen disappear, so I ran Boot Repair and reinstalled rEFIt and everything worked. I accidentally left my computer without power while booted into Ubuntu, until it presumably died or hibernated itself. I have been unable to boot into Ubuntu since. I didn't see the GRUB screen when I selected Linux the rEFIt chooser. Then I reinstalled rEFIt and the Linux option disappeared from the rEFIt chooser. This is a link to the boot info collected by Boot Repair: http://paste.ubuntu.com/755543/ Any help would be appreciated, especially an explanation of what all these components are (EFI, MBR, GPT, GRUB), where they live on disk, how the system knows to find each component, and how they relate to each other. Thanks!

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• Star Wars Roguelike Combines Star Wars and Old School ASCII Adventures

  - by Jason Fitzpatrick

  Mashup ASCII-based adventuring, Star Wars, and some sweet light saber sound effects, and you’ve got this old-school in-browser adventure game: Star Wars Roguelike. Play a Jedi or Sith and move about the ASCII world with simple keyboard commands. You’re not going to be blow away by the photo-realistic graphics, but you are going to be able to play it on your aging work computer. Hit up the link below to take the game for a spin. Star Wars Roguelike [via Boing Boing] How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices

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• Car engine sound simulation

  - by Petteri Hietavirta

  I have been thinking how to create realistic sound for a car. The main sound is the engine, then all kind of wind, road and suspension sounds. Are there any open source projects for the engine sound simulation? Simply pitching up the sample does not sound too great. The ideal would be to something that allows me to pick type of the engine (i.e. inline-4 vs v-8), add extras like turbo/supercharger whine and finally set the load and rpm. Edit: Something like http://www.sonory.org/examples.html

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• TOMORROW! UPK for Testing Webinar

  - by Karen Rihs

  UPK Webinar:  UPK for Testing September 13, 2012 10 am pacific / 1 pm eastern As an implementation and enablement tool, Oracle’s User Productivity Kit (UPK) provides value throughout the software lifecycle.  Application testing is one area where customers like Northern Illinois University (NIU) are finding huge value in UPK and are using it to validate their systems.  Join us for an OAUG-sponsored event on Sept 13th to hear Beth Renstrom, UPK Product Manager and Bettylynne Gregg, NIU ERP Coordinator, discuss how the Test It Mode, Test Scripts, and Test Cases of UPK can be used to facilitate applications testing. Click Here to Register

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• This Week in Geek History: HAL Goes Live, First Alien Moon Landing, First Fighter Jet Ejection Seat

  - by Jason Fitzpatrick

  Every week we bring you interesting facts from the annuals of Geekdom. This week in Geek History saw the birth of HAL, the first landing on an alien moon, and the first real-world test of a fighter jet ejection seat. Latest Features How-To Geek ETC HTG Projects: How to Create Your Own Custom Papercraft Toy How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk What is Camera Raw, and Why Would a Professional Prefer it to JPG? The How-To Geek Guide to Audio Editing: The Basics How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 Calvin and Hobbes Mix It Up in this Fight Club Parody [Video] Choose from 124 Awesome HTML5 Games to Play at Mozilla Labs Game On Gallery Google Translate for Android Updates to Include Conversation Mode and More Move Your Photoshop Scratch Disk for Improved Performance Winter Storm Clouds on the Horizon Wallpaper Existential Angry Birds [Video]

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• Postfix and tmpfs for /var/spool

  - by Rob Fisher

  My main disk is an SSD so in order to preserve its lifetime by reducing writes I followed some advice and made /var/spool a ram disk by adding this line to /etc/fstab: tmpfs /var/spool tmpfs defaults,noatime,mode=1777 0 0 Later I configured postfix because I have a RAID array on my system and mdadm wants to send me email if the RAID array fails which sounds like a fine idea. Email sending worked fine until I rebooted, at which point: postfix: fatal: open /etc/postfix-out/main.cf: No such file or directory The fix for this is apparently: mkdir /var/spool/postfix postfix check Then I found I also had to do: mkfifo /var/spool/postfix/public/pickup service postfix restart Now sending emails works fine...until the next reboot. So: what is the most correct way to recreate the contents of /var/spool/postfix automatically at boot time if it does not exist? I am using Ubuntu Server 12.04.

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• How to enable 801.11 n with BCM4313

  - by Jan

  I own a ASUS 1215N with the BCM4313 wireless radio. In windows I can connect to "n" wireless networks without problem however Ubuntu 11.10 can only "see" and connect to "g" networks. I have already read through How do I get my Broadcom BCM4313 working correctly? and How do I get the Broadcom BCM4313 wireless working on an Asus 1015PX?. According to them i run the correct drivers and i have blacklisted everything useless. now this link http://ubuntuforums.org/showthread.php?t=1892229 says the 11.10 drivers have a bug and the OP solves this by compling himself a new driver, but how?

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• Do I need to install a package (openSWAN or strongSWAN maybe) to use ipsec?

  - by user68886

  I want to connect to a windows share that only accepts ipsec transport mode. I have a list of security policies and a shared secret. I've skimmed through the man page on ipsec.conf on the web and it seems to be the place to put these polices. If ipsec is part of the kernel (and I think it is, I'm using Ubuntu 12.04) do I need to install some other package in order to get this working? I'm guessing it's either openSWAN or strongSWAN but don't know the difference.

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• Install Ubuntu 12.04 on a ACER AC100

  - by pidarn

  I'm trying to install a 12.04.1 on an ACER AC100 - Mini-Server. After booting from the Install-CD there are no Disks shown. In Bios I disabled the Intel-Raid /LSI-Raid. I want to install on the 1st of 4 "native" disks and I tried to do this with RHEL 6.4 where all Disks are visible - but the UBUNTU-Installer doesn't find any of them. btw ... If I boot from the UBUNTU - Install-CD in "rescue"-mode the disks are visible?! Any Ideas?

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• why installing lame it is getting failed

  - by Rahul Mehta

  I want to install ffmpeg with mp3lame enabled for this m following this tutorial , http://ubuntuforums.org/showpost.php?p=9868359&postcount=1289 and in step 2 error is libfaac is not found ? and in step 5 installing lame is giving this error , why it is getting failed , please advised what to do ? reach121@youngib:~/lame-3.98.4$ sudo checkinstall --pkgname=lame-ffmpeg --pkgversion="3.98.4" --backup=no --default --deldoc=yes checkinstall 1.6.2, Copyright 2009 Felipe Eduardo Sanchez Diaz Duran This software is released under the GNU GPL. ***************************************** **** Debian package creation selected *** ***************************************** This package will be built according to these values: 0 - Maintainer: [ root@youngib ] 1 - Summary: [ Package created with checkinstall 1.6.2 ] 2 - Name: [ lame-ffmpeg ] 3 - Version: [ 3.98.4 ] 4 - Release: [ 1 ] 5 - License: [ GPL ] 6 - Group: [ checkinstall ] 7 - Architecture: [ amd64 ] 8 - Source location: [ lame-3.98.4 ] 9 - Alternate source location: [ ] 10 - Requires: [ ] 11 - Provides: [ lame-ffmpeg ] 12 - Conflicts: [ ] 13 - Replaces: [ ] Enter a number to change any of them or press ENTER to continue: Installing with make install... ========================= Installation results =========================== Making install in mpglib make[1]: Entering directory `/home/reach121/lame-3.98.4/mpglib' make[2]: Entering directory `/home/reach121/lame-3.98.4/mpglib' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/mpglib' make[1]: Leaving directory `/home/reach121/lame-3.98.4/mpglib' Making install in libmp3lame make[1]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame' Making install in i386 make[2]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/i386' make[3]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/i386' make[3]: Nothing to be done for `install-exec-am'. make[3]: Nothing to be done for `install-data-am'. make[3]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/i386' make[2]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/i386' Making install in vector make[2]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[3]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[3]: Nothing to be done for `install-exec-am'. make[3]: Nothing to be done for `install-data-am'. make[3]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[2]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame/vector' make[2]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame' make[3]: Entering directory `/home/reach121/lame-3.98.4/libmp3lame' test -z "/usr/local/lib" || /bin/mkdir -p "/usr/local/lib" /bin/bash ../libtool --mode=install /usr/bin/install -c 'libmp3lame.la' '/usr/local/lib/libmp3lame.la' /usr/bin/install -c .libs/libmp3lame.lai /usr/local/lib/libmp3lame.la /usr/bin/install -c .libs/libmp3lame.a /usr/local/lib/libmp3lame.a chmod 644 /usr/local/lib/libmp3lame.a ranlib /usr/local/lib/libmp3lame.a PATH="$PATH:/sbin" ldconfig -n /usr/local/lib ---------------------------------------------------------------------- Libraries have been installed in: /usr/local/lib If you ever happen to want to link against installed libraries in a given directory, LIBDIR, you must either use libtool, and specify the full pathname of the library, or use the `-LLIBDIR' flag during linking and do at least one of the following: - add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution - add LIBDIR to the `LD_RUN_PATH' environment variable during linking - use the `-Wl,--rpath -Wl,LIBDIR' linker flag - have your system administrator add LIBDIR to `/etc/ld.so.conf' See any operating system documentation about shared libraries for more information, such as the ld(1) and ld.so(8) manual pages. ---------------------------------------------------------------------- make[3]: Nothing to be done for `install-data-am'. make[3]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame' make[2]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame' make[1]: Leaving directory `/home/reach121/lame-3.98.4/libmp3lame' Making install in frontend make[1]: Entering directory `/home/reach121/lame-3.98.4/frontend' make[2]: Entering directory `/home/reach121/lame-3.98.4/frontend' test -z "/usr/local/bin" || /bin/mkdir -p "/usr/local/bin" /bin/bash ../libtool --mode=install /usr/bin/install -c 'lame' '/usr/local/bin/lame' /usr/bin/install -c lame /usr/local/bin/lame make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/frontend' make[1]: Leaving directory `/home/reach121/lame-3.98.4/frontend' Making install in Dll make[1]: Entering directory `/home/reach121/lame-3.98.4/Dll' make[2]: Entering directory `/home/reach121/lame-3.98.4/Dll' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/Dll' make[1]: Leaving directory `/home/reach121/lame-3.98.4/Dll' Making install in debian make[1]: Entering directory `/home/reach121/lame-3.98.4/debian' make[2]: Entering directory `/home/reach121/lame-3.98.4/debian' make[2]: Nothing to be done for `install-exec-am'. make[2]: Nothing to be done for `install-data-am'. make[2]: Leaving directory `/home/reach121/lame-3.98.4/debian' make[1]: Leaving directory `/home/reach121/lame-3.98.4/debian' Making install in doc make[1]: Entering directory `/home/reach121/lame-3.98.4/doc' Making install in html make[2]: Entering directory `/home/reach121/lame-3.98.4/doc/html' make[3]: Entering directory `/home/reach121/lame-3.98.4/doc/html' make[3]: Nothing to be done for `install-exec-am'. test -z "/usr/local/share/doc/lame/html" || /bin/mkdir -p "/usr/local/share/doc/lame/html" /bin/mkdir: cannot create directory `/usr/local/share/doc': No such file or directory make[3]: *** [install-pkghtmlDATA] Error 1 make[3]: Leaving directory `/home/reach121/lame-3.98.4/doc/html' make[2]: *** [install-am] Error 2 make[2]: Leaving directory `/home/reach121/lame-3.98.4/doc/html' make[1]: *** [install-recursive] Error 1 make[1]: Leaving directory `/home/reach121/lame-3.98.4/doc' make: *** [install-recursive] Error 1 **** Installation failed. Aborting package creation. Cleaning up...OK Bye. reach121@youngib:~/lame-3.98.4$

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• Sound Juicer doesn't respect Lame's codec settings when ripping CDs

  - by Takkat

  Using Sound Juicer I am able to rip CDs very conveniently. I would like to rip them in about 256 kbit/s variable bitrate. To accomplish this I have defined the settings for mp3 in gnome-audio-profiles-properties as follows: audio/x-raw-int,rate=44100,channels=2 ! lame name=enc mode=0 vbr-quality=0 ! id3v2mux where vbr-quality=0 should give me a variable bitrate averaging 245 kbit/s. The resulting files however always say they are in 128 kbit/s. Is this only a tagging bug or is indeed the bitrate that low? How could I find out?

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• Post Deploy MAAS cleanup

  - by David Buttrick

  I have a mostly working MAAS cluster. I'm still learning juju, but while I'm doing that, I wanted to take this opportunity to do some clean-up tasks. Here are my goals: Configure ntp on the nodes. Set the video mode on the nodes. Set the timezone on the nodes. Are these juju tasks? Or is this better attacked by mounting the disk image on the MAAS host, and doing the configuration there? If I do it that way, how do I get the nodes to recognize that they have to re-install the image to pickup my changes? Thank you. David

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• Grub Boot Error After Ubuntu Update

  - by Anna

  I've installed Ubuntu 10.04 with dual boot to Windows XP. I put it on auto-update. It was updating grub et al and after a restart all it says is; error:no such device: <hex number> With a grub rescue prompt. I'm in panic mode right now as it's my mother's office computer and it might have some serious repercussions for her tomorrow. What should I do? Update: It appears that the partition structure has been corrupted since it only displays (hd0) on ls

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• Two Wifi Icons in Panel [Solved]

  - by Alex

  I have the exact problem in 13.10 as this user Two Wifi indicators in panel. Here are some screenshots: Here are some screenshots from another user: http://ubuntuforums.org/showthread.php?t=2183020&p=12825563 ifconfig and iwconfig outputs $ ifconfig lo Link encap:Local Loopback inet addr:XXXXXX Mask:XXXXXXX inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:2243 errors:0 dropped:0 overruns:0 frame:0 TX packets:2243 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:209889 (209.8 KB) TX bytes:209889 (209.8 KB) wlan0 Link encap:Ethernet HWaddr XXXXXXXXX inet addr:XXXXXX Bcast:XXXXXXXX Mask:XXXXXXX inet6 addr: XXXXXXX Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5925 errors:0 dropped:0 overruns:0 frame:0 TX packets:3361 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2951818 (2.9 MB) TX bytes:630579 (630.5 KB) $ iwconfig lo no wireless extensions. wlan0 IEEE 802.11abgn ESSID:"XXXXX" Mode:Managed Frequency:2.437 GHz Access Point: XXXXXXXX Bit Rate=72.2 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:on Link Quality=49/70 Signal level=-61 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:153 Invalid misc:472 Missed beacon:0

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• lost the vertical scroll function in touchpad after upgrading from 13.04 to 13.10

  - by Lars Lundblad

  just upgraded from Ubuntu 13.04 to Ubuntu 13.10, my Laptop is a Sony SVE1512c6ew, scrolling worked perfectly in Ubuntu 13.04, doesnt work at all in 13.10 Runs Ubuntu 13.10 64bits (btw, tested it i Windows 8 environment works there)Hardware OK, have seen a number of other users with the same problem, well for starters have followed the tip on using the dconf editor, following the path: org gnome settings-daemon peripherals touchpad boxed in all for sure... still cant get vertical scroll...... Any ideas??? Thanks in advance Lars Lundblad / please feel free to mail answers to [email protected] Input device information according to Udev: Input device Subsystem: input Devtype: n/a Name: input7 Number: 7 Sysfs_path: /sys/devices/platform/i8042/serio1/input/input7 Driver: n/a Action: n/a Seqnum: n/a Device type: n/a Device number: 0 Device file: n/a Device file symlinks: n/a Touchpad device Subsystem: input Devtype: n/a Name: mouse1 Number: 1 Sysfs_path: /sys/devices/platform/i8042/serio1/input/input7/mouse1 Driver: n/a Action: n/a Seqnum: n/a Device type: char Device number: 3361 Device file: /dev/input/mouse1 Device file symlinks: /dev/input/by-path/platform-i8042-serio-1-mouse

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• Five Things Learned at the BSR Conference in San Francisco on Nov 2nd-4th

  - by Evelyn Neumayr

  The BSR Conference 2011—“Redefining Leadership”—held from Nov 2nd to Nov 4th in San Francisco, with Oracle as one of the main sponsors, saw senior business executives, civil society representatives, and other experts from around the world gathering to share strategies and insights on the future of sustainability. The general conference sessions kicked off on November 2nd with a plenary address by former U.S. Vice President Al Gore. Other sessions were presented by CEOs of the caliber of Carl Bass (Autodesk), Brian Dunn (Best Buy), Carlos Brito (Anheuser-Busch InBev) and Ofra Strauss (Strauss Group). Here are five key highlights from the conference: 1.      The main leadership challenge is integrating sustainability into core business functions and overcoming short-termism. The “BSR GlobeScan State of Sustainable Business Poll 2011” - a survey of nearly 500 business leaders from 300 member companies - shows that 84% of respondents are optimistic that global businesses will embrace CSR/sustainability as part of their core strategies and operations in the next five years but consider integrating sustainability into their core business functions the key challenge. It is still difficult for many companies that are committed to the sustainability agenda to find investors that understand the long-term implications and as Al Gore said “Many companies are given the signal by the investors that it is the short term results that matter and that is a terribly debilitating force in the market.” 2.      Companies are required to address increasing compliance requirements and transparency in their supply chain, especially in relation with conflict minerals legislation and water management. The Dodd-Frank legislation, OECD guidelines, and the upcoming Securities and Exchange Commission (SEC) rules require companies to monitor upstream the sourcing of tin, tantalum, tungsten, and gold, but given the complexity of this issue companies need to collaborate and partner with peer companies in their industry as well as in other industries to understand how to address conflict minerals in their supply chains. The Institute of Public and Environmental Affairs’ (IPE) China Water Pollution Map enables the public to access thousands of environmental quality, discharge, and infraction records released by various government agencies. Empowered with this information, the public has the opportunity to place greater pressure on polluting companies to comply with environmental standards and create solutions to improve their performance. 3.      A new standard for reporting on supply chain greenhouse gas emissions is available. The New “Scope 3” Supply Chain Greenhouse Gas Inventory Standard, released on October 4th 2011, is the only international greenhouse gas emissions standard that accounts for the full lifecycle of a company’s products. It provides a framework for companies to account for indirect emissions outside of energy use, such as transportation, manufacturing, and distribution, and it incorporates both upstream and downstream impacts of a product. With key investors now listing supplier vulnerability to rising energy prices and disruptions of service as a key concern, greenhouse gas (GHG) management isn’t just for leading companies but a necessity for any business. 4.      Environmental, social, and corporate governance (ESG) reporting is becoming increasingly important to investors and other stakeholders. While European investors have traditionally driven the ESG agenda, U.S. investors are increasingly including ESG data in their analyses. This trend will likely increase as stakeholders continue to demand that an ESG lens be applied to their investments. Investors are increasingly looking to partner on sustainability, as they see the benefits of ESG providing significant returns on investment. 5.      Software companies are offering an increasing variety of solutions to help drive changes and measure performance internally, in supply chains, and across peer companies. The significant challenge is how to integrate different software systems to facilitate decision-making based on a holistic understanding of trade-offs. Jon Chorley, Chief Sustainability Officer and Vice President, Supply Chain Management Product Strategy at Oracle was a panelist in the “Trends in Sustainability Software” session and commented that, “How we think about our business decisions really comes down to how we think about cost. And as long as we don’t assign a cost to things that have an environmental impact or social impact, then we make decisions based on incomplete information. If we could include that in the process that determines ‘Is this product profitable? we would then have a much better decision.” For more information on BSR visit www.brs.org. You can also view highlights of the plenary session at http://www.bsr.org/en/bsr-conference/session-summaries/2011. Oracle is proud to be a sponsor of this BSR conference. By Elena Avesani, Principal Product Strategy Manager, Oracle          

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• Firefox zombie process problem

  - by user52987

  When I start Firefox a Firefox zombie process starts sometimes (not always) and then goes away after a few seconds (stays sometimes until firefox is closed). This problem occurs with four computers (2 laptops and 2 desktops running ubuntu 10.04, 11.10, precise beta 1 and beta 2) I also have this same problem with other distros like Fedora 16, Linux mint 12, Debian 6 and Arch Linux. Thunderbird is also affected by this zombie process problem. Firefox safe mode does NOT help! Can someone help me to fix this problem? If you are affected by this bug please click "this bug affects me" on launchpad. My bug report (screenshot included)

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• Fan running constantly on a Dell D420 laptop

  - by Halik

  I'm running latest Ubuntu 12.04 beta on a Dell D420 laptop. The fan is spinning almost constantly - even after turning the PC off, letting it cool down, and then turning it back on, the fan will turn on after some idle time. Not to mention any CPU work. The CPU temps are normal, in range of 50-55 idle, and up to 70 with some load. It wouldn't be an issue, but the same PC running Fedora, or Arch Linux, had a much more modest fan profile - the temps were managed while you seldom heard the fan. To counter the problem, I currently use i8k tools, set manual temperature thresholds which seemed to have worked, but the i8kmon has a tendency to cycle the fan between lower and higher state within aboutin a second intervals - which is extremely annoying. As far as I can tell I did not run any special software (beside laptop-mode-tools), or any additional kernel modules when running Arch Linux and I can't tell about Fedora.

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• Game server for an android/iOS turn-based board-game

  - by Cyril

  I am currently programming an iPhone game and I would like to create an online multiplayer mode. In the future, this app will be port to Android devices, so I was wondering how to create the game-server? First at all, which language should I choose? How to make a server able to communicate both with programs written in objective-c and Java? Then, how to effectively do it? Is it good if I open a socket by client (there'll be 2)? What kind of information should I send to the server? to the clients?

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• Game server for an android/iOS turn-based board-game

  - by Cyril

  I am currently programming an iPhone game and I would like to create an online multiplayer mode. In the future, this app will be port to Android devices, so I was wondering how to create the game-server? First at all, which language should I choose? How to make a server able to communicate both with programs written in objective-c and Java? Then, how to effectively do it? Is it good if I open a socket by client (there'll be 2)? What kind of information should I send to the server? to the clients?

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• How can I relaunch juju daemons without stop/starting local LXC VMs

  - by vaab

  I'm using juju in local mode with LXC. I updated juju on the host with a classical: apt-get install juju And had a plentyful of python errors in juju debug-log probably because juju processes weren't restarted. In order to restart juju processes, I had to do a complete: juju destroy-environment juju bootstrap which deleted all contents in /var/lib/lxc. I was warned, and this was not an issue, but will be when I'll be in a production environment. Is there a way to relaunch juju daemons without stop/starting LXC local VMs ?

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• ~/.bashrc return can only 'return' from a function or sourced script

  - by Timothy

  I am trying to setup a OpenStack box to have a look at OpenStack Object Storage (Swift). Looking through the web I found this link; http://swift.openstack.org/development_saio.html#loopback-section I followed the instructions line by line but stuck on step 7 in the "Getting the code and setting up test environment" section. When I execute ~/.bashrc I get; line 6: return: can only 'return' from a function or sourced script. Below is the Line 6 extract from ~/.bashrc. My first reaction is to comment this line out, but I dont know what it does. Can anyone help? #If not running interactively, dont't do anything [ -z "$PS1" ] && return I'm running Ubuntu 12.04 as a VM on Hyper-v if knowing that is useful.

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• Enable wifi on my computer - firmware missing

  - by Sarah

  I am attempting to set up a wireless network on 11.04, freshly download today. The router is on and working. However, I do not have a wifi "card" (which I am assuming is a little USB-type thing that allows internet access, but correct me if I am wrong) and every time I try to type in the MAC address and everything, nothing works. I also get the "firmware missing" error when I scroll over the signal strength, which I have tried looking up but have been unsuccessful with completely understanding it. I guess my main question is do I need another little device to be able to use wifi on my ubuntu? I do have an ethernet cable but another person is using it and I do not want to be tied down to that cable. the problem is that none of the wireless networks show up, however they show up when I go into Windows mode on my laptop. I get an error message at the top saying "firmware missing" which I have tried looking up but still have no straight answer for.

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• Continuous integration - build Debug and Release every time?

  - by Darian Miller

  Is it standard practice when setting up a Continuous Integration server to build a Debug and Release version of each project? Most of the time developers code with a Debug mode project configuration set enabled and there could be different library path configurations, compiler defines, or other items configured differently between Debug/Release that would cause them to act differently. I configured my CI server to build both Debug & Release of each project and I'm wondering if I'm just overthinking it. My assumption is that I'll do this as long as I can get quick feedback and once that happens, then push the Release off to a nightly build perhaps. Is there a 'standard' way of approaching this?

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