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  • How can I manage multiple administrators with juju?

    - by Jorge Castro
    I manage some deployments with juju. However I am not an island, I have coworkers who also want to manage shared environments. I know I can use the following stanza in ~/.juju/environments.yaml to give people access to my juju environment: authorized-keys: [and then put their ssh IDs in here] What other best practices are available to manage multiple environments with multiple system administrators?

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  • How do I install lubuntu? (kernel panic)

    - by melvincv
    Please help me install Lubuntu 12.04 i386 on an old computer. I select the "Try Lubuntu without installing" and it crashes with a kernel panic. Rarely I do get to the live OS, but soon the display goes blank. The messages log gives me '[drm] ERROR GPU hung/wedged' The specs are: Pentium 4 2.4GHz 1GB DDR RAM 40GB PATA HDD Intel 845GL chipset (8MB framebuffer, 64MB shared system memory set in the BIOS)

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  • Warning: Why your Internet might fail on May 5

    <b>IT News:</b> "On May 5, the world's top domain authorities (led by ICANN, the US Government and Verisign) will complete the first phase of the roll-out of DNSSEC (Domain Name System Security Extensions) across the 13 root servers that direct user requests to the relevant websites on the internet."

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  • Warning: Why your Internet might fail on May 5

    <b>IT News:</b> "On May 5, the world's top domain authorities (led by ICANN, the US Government and Verisign) will complete the first phase of the roll-out of DNSSEC (Domain Name System Security Extensions) across the 13 root servers that direct user requests to the relevant websites on the internet."

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  • Linux AI robot baby dinosaur

    <b>Handle With Linux:</b> "Watch this: a Linux powered baby dinosaur, with a arm processor heart. The robot runs Live OS. An embedded, linux based operating system which features a custom programming language, giving the possibility to interact with the robot on the programming level"

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  • Should I Adjust the Volume by Software or Hardware?

    - by Jason Fitzpatrick
    You can adjust the your speaker volume in-app, operating system-wide, or by the physical controls on your speaker setup. Which method is best for optimum sound? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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  • My screen turns off when I watch movies on YouTube [duplicate]

    - by Radu Radeanu
    This question already has an answer here: How to prevent my screen from dimming when watching YouTube? 4 answers When I use VLC or other media player, I can watch the movie until the end without touching the PC. If I watch a movie on YouTube using Chromium or Firefox my screen will turn off as is set in System Settings Brightness and Lock. How to prevent this without to change the settings in Brightness and Lock. Edit: My Ubuntu 13.04 with Gnome 3.6.3.1 uses gnome-screensaver (I didn't installed any other screensaver).

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  • cdrom mounting issues

    - by Mezo
    This is my very first boot on ubuntu and I noticed the system did not open, pop up anything when I inserted a DVD. Researched a bit about and it seems ubuntu doesn't mount cd drives automatically, is that true or just for my case? I tried some terminal commands and got the cd to mount. Is there a way it will behave like windows, and be there for me when I need it, with no need to play with terminal? thanks for any help. --Mezo

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  • Stuxnet - how it infects

    - by Kit Ong
    Except from the CNET article.http://news.cnet.com/8301-13772_3-57413329-52/stuxnet-delivered-to-iranian-nuclear-plant-on-thumb-drive/?part=propeller&subj=news&tag=linkvThe Stuxnet worm propagates by exploiting a hole in all versions of Windows in the code that processes shortcut files, ending in ".lnk," according to...[the] Microsoft Malware Protection Center....Merely browsing to the removable media drive using an application that displays shortcut icons, such as Windows Explorer, will run the malware without the user clicking on the icons. The worm infects USB drives or other removable storage devices that are subsequently connected to the infected machine. Those USB drives then infect other machines much like the common cold is spread by infected people sneezing into their hands and then touching door knobs that others are handling.The malware includes a rootkit, which is software designed to hide the fact that a computer has been compromised, and other software that sneaks onto computers by using a digital certificates signed two Taiwanese chip manufacturers that are based in the same industrial complex in Taiwan--RealTek and JMicron, according to Chester Wisniewski, senior security advisor at Sophos.... It is unclear how the digital signatures were acquired by the attacker, but experts believe they were stolen and that the companies were not involved.Once the machine is infected, a Trojan looks to see if the computer it lands on is running Siemens' Simatic WinCC software. The malware then automatically uses a default password that is hard-coded into the software to access the control system's Microsoft SQL database. The Stuxnet worm propagates by exploiting a hole in all versions of Windows in the code that processes shortcut files, ending in ".lnk," according to...[the] Microsoft Malware Protection Center....Merely browsing to the removable media drive using an application that displays shortcut icons, such as Windows Explorer, will run the malware without the user clicking on the icons. The worm infects USB drives or other removable storage devices that are subsequently connected to the infected machine. Those USB drives then infect other machines much like the common cold is spread by infected people sneezing into their hands and then touching door knobs that others are handling.The malware includes a rootkit, which is software designed to hide the fact that a computer has been compromised, and other software that sneaks onto computers by using a digital certificates signed two Taiwanese chip manufacturers that are based in the same industrial complex in Taiwan--RealTek and JMicron, according to Chester Wisniewski, senior security advisor at Sophos.... It is unclear how the digital signatures were acquired by the attacker, but experts believe they were stolen and that the companies were not involved.Once the machine is infected, a Trojan looks to see if the computer it lands on is running Siemens' Simatic WinCC software. The malware then automatically uses a default password that is hard-coded into the software to access the control system's Microsoft SQL database.

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  • Using only password to authenticate user (no "username" field)

    - by Guy
    I am creating a client access system, to allow manage invoices, make payments, access information about their products and information/functionality alike. Supposedly there are less than 1000 clients. Would there be any security threat to use only password (UUID v4 strings) to authenticate user? My thoughts: There is virtually no probability of collision or success with brute-force attack. http://en.wikipedia.org/wiki/UUID#Random%5FUUID%5Fprobability%5Fof%5Fduplicates User friendly (one click go) It is not intended to be remembered

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  • Eager to Learn More About Oracle Solaris 11?

    - by tfryer
    Are you a Solaris 11 System Administrator eager to know more? Oracle University is pleased to announce the release of two new courses: Solaris 11 ZFS Administration Oracle Solaris 11 Zones Administration Remember: your OPN discount is added to the standard prices shown on the website. Also check out the updated Oracle Solaris 11 Learning Path. For more information, assistance and bookings, contact your local Oracle University Service Desk.

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  • Desktop Fun: Feathered Friends Wallpaper Collection Series 2

    - by Asian Angel
    Last year we featured a wonderful flock of feathered friends wallpapers for your desktop and today we are back with more. Turn your desktop into a colorful nesting ground with the second in our series of Feathered Friends Wallpaper collections. HTG Explains: Is ReadyBoost Worth Using? HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks

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  • update manager - insufficient storage space (false alarm)

    - by itsols
    I'm trying to run Update Manager but it keeps reporting that there's not enough space. Here's the screenshot: I ran sudo apt-get update && sudo apt-get upgrade from the terminal but still update manager says that there are updates and I cannot seem to get pass this message. I have even removed many programs from my system and there is supposed to be at least 6GB of disk space free. What can I do?

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  • Having troubles installing Ubuntu using Wubi

    - by Torsten
    I am trying to install Ubuntu on My Toshiba laptop, it is a 64 bit system and is running windows 7 I keep on getting this error Error executing command command=C:\Users\A'den\AppData\Local\Temp\pylA524.tmp\bin]resize2fs.exe -C:\ubuntu\disks\root.disk17744M recal=1 stderr= stdout=resie2fs 1.40.6 (09-Feb-2008) Usage: /cygdrive/c/Users/Aden/AppData/Local/Temp/pylA524.tmp/bin/resize 2fs.exe-f C:/disks/root.disk 17744M [-d debug_flags] [-f] [-F] [-p] device [new-size] and the log file reads

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  • What norms/standards should I follow when writing a functional spec?

    - by user970696
    I would like to know what documents (ISO?) should I follow when I write a functional specification. Or what should designers follow when creating the system design? I was told that there was a progress in last years but was not told what the progress was in (college professor). Thank you EDIT: I do not speak about document content etc. but about standards for capturing requirements, for business analysis.

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  • How to recover from GNOME 3.2 freeze?

    - by Vivek
    I have Ubuntu 11.10 installed and am using GNOME 3.2. I am left with no other option than to restart gdm or to reboot the system, when GNOME freezes. GNOME freezes at times when resuming from suspend and every time I search in the dashboard, inspite of having GNOME 3.2 compatible theme installed. Is there any option to restart shell from tty? Or is there any other solution to recover from the freeze?

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  • fdisk shows overlapping partitions

    - by Campa
    At every boot to start Ubuntu, a partition gets re-mounted more than 1 times, sometimes causing very long boots. Example below: > dmesg ... [ 21.472020] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro ... [ 42.021537] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0 ... I suspect there is a problem of overlapping partitions here, regarding sda4 and sda5: > sudo fdisk -l Device Boot Start End Blocks Id System /dev/sda1 63 610469 305203+ de Dell Utility /dev/sda2 612352 32069631 15728640 7 HPFS/NTFS/exFAT /dev/sda3 * 32069632 238979788 103455078+ 7 HPFS/NTFS/exFAT /dev/sda4 238983166 625141759 193079297 5 Extended /dev/sda5 238983168 612630527 186823680 83 Linux /dev/sda6 612632576 625141759 6254592 82 Linux swap / Solaris Further details: > more /etc/fstab ... # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda6 during installation UUID=b33be99b-5c9e-449e-ad48-be608aeff001 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda7 during installation UUID=7c9071cc-b77b-40da-9f80-6b8a9a220cb1 none swap sw and > mount /dev/sda5 on / type ext4 (rw,errors=remount-ro,commit=0) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) fusectl on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev) gvfs-fuse-daemon on /home/piero/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=piero) I am Running Ubuntu Oneiric + LXDE on Dell Studio XPS machine 64-bit, dual booting with Windows 7. A months ago, I resized the Ubuntu partition and maybe I messed up something by doing that. Do you have any idea, why this long booting is happening?

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  • The Impact of Google Caffeine

    Google Caffeine is the new Google indexing system, with the aim of providing better results for their 128 million worldwide users. So what is Google Caffeine and how will it affect Google's users and website owners?

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  • switch HDD in laptop

    - by jolly
    the internal hard drive that I have right now in my laptop is coming near its death, clicking for life, so I decided to buy a new HDD. However, I don't want to spend two weeks setting up my system to fit me as it does right now, so I thought that I can make just a hard copy of all the contents to the new disk (using dd). My question is: is it going to work? :-) What are the things that need to be changed, except fstab?

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  • 4.8M wasn't enough so we went for 5.055M tpmc with Unbreakable Enterprise Kernel r2 :-)

    - by wcoekaer
    We released a new set of benchmarks today. One is an updated tpc-c from a few months ago where we had just over 4.8M tpmc at $0.98 and we just updated it to go to 5.05M and $0.89. The other one is related to Java Middleware performance. You can find the press release here. Now, I don't want to talk about the actual relevance of the benchmark numbers, as I am not in the benchmark team. I want to talk about why these numbers and these efforts, unrelated to what they mean to your workload, matter to customers. The actual benchmark effort is a very big, long, expensive undertaking where many groups work together as a big virtual team. Having the virtual team be within a single company of course helps tremendously... We already start with a very big server setup with tons of storage, many disks, lots of ram, lots of cpu's, cores, threads, large database setups. Getting the whole setup going to start tuning, by itself, is no easy task, but then the real fun starts with tuning the system for optimal performance -and- stability. A benchmark is not just revving an engine at high rpm, it's actually hitting the circuit. The tests require long runs, require surviving availability tests, such as surviving crashes -and- recovery under load. In the TPC-C example, the x4800 system had 4TB ram, 160 threads (8 sockets, hyperthreaded, 10 cores/socket), tons of storage attached, tons of luns visible to the OS. flash storage, non flash storage... many things at high scale that all have to be perfectly synchronized. During this process, we find bugs, we fix bugs, we find performance issues, we fix performance issues, we find interesting potential features to investigate for the future, we start new development projects for future releases and all this goes back into the products. As more and more customers, for Oracle Linux, are running larger and larger, faster and faster, more mission critical, higher available databases..., these things are just absolutely critical. Unrelated to what anyone's specific opinion is about tpc-c or tpc-h or specjenterprise etc, there is a ton of effort that the customer benefits from. All this work makes Oracle Linux and/or Oracle Solaris better platforms. Whether it's faster, more stable, more scalable, more resilient. It helps. Another point that I always like to re-iterate around UEK and UEK2 : we have our kernel source git repository online. Complete changelog of the mainline kernel, and our changes, easy to pull, easy to dissect, easy to know what went in when, why and where. No need to go log into a website and manually click through pages to hopefully discover changes or patches. No need to untar 2 tar balls and run a diff.

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