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• How to get the correct battery status?

  - by GUI Junkie

  At this moment, ever since I installed Ubuntu on this machine, the battery status says: not present. Looking at this answer, however, I find that /proc/acpi/battery/BAT1/info (sometimes its /proc/acpi/battery/BAT0/info, use tab complete to help) has the following info: present: yes design capacity: 4400 mAh last full capacity: 4400 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 300 mAh design capacity low: 132 mAh cycle count: 0 capacity granularity 1: 32 mAh capacity granularity 2: 32 mAh model number: BAT1 serial number: 11 battery type: 11 OEM info: 11 In accordance to this answer, I've checked the /proc/acpi/battery/BAT1/state file: present: yes capacity state: ok charging state: charged present rate: unknown remaining capacity: unknown present voltage: 10000 mV The acpi -b command returns: Battery 0: Unknown, 0%, rate information unavailable Any suggestions on getting the battery info updated?

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• Simpler Times

  - by Simon Moon

  Does anyone else out there long for the simpler days where you needed to move a jumper in the jumper block to set your modem card to use IRQ7 so it would not conflict with the interrupts used by other boards in your PC and your modem card came with a 78 page manual telling you everything you would need to know to write your own driver for the board including a full schematic along with the board layout showing every chip, capacitor, and resistor?  Ahhhhh, the simplicity!I am wrestling with UserPnp issues for a USB software licensing dongle that is needed by some third party software in one of our production applications. Of course, every machine in production is virtual, so it could be anything in the chain of the software application library to the device driver running on the VM to the configuration of the simulated USB port to the implementation of the USB connection and transport in the virtual host to the physical electrical connections in the USB port on the hypervisor.If only there were the virtual analog to a set of needle-nose pliers to move a virtual jumper.Come to think of it, I always used to drop those damn things such that they would land in an irretrievable position under the motherboard anyway.

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• Ubuntu installation accuses false RAID

  - by rOim

  I'm trying to install a Ubuntu 12.04/Win7 dual boot on my machine (with 2 750GB HDs). Problem is, during the partitioning, the installation says I'm using RAID, and shows only one HD, with 1.5TB. I have, however, disabled raid on the setup, and installed Windows 7 only on HD 1, and want to keep Ubuntu to HD 2. I'm afraid to "resize" the partitions using the installer since that could mess my win7 installation. I did try to use the alternate installer, but had the same results.

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• Solved: Chrome v18, self signed certs and &ldquo;signed using a weak signature algorithm&rdquo;

  - by David Christiansen

  So chrome has just updated itself automatically and you are now running v18 – great. Or is it… If like me, you are someone that are running sites using a self-signed SSL Certificate (i.e. when running a site on a developer machine) you may come across the following lovely message; Fear not, this is likely as a result of you following instructions you found on the apache openssl site which results in a self signed cert using the MD5 signature hashing algorithm. Using OpenSSL The simple fix is to generate a new certificate specifying to use the SHA512 signature hashing algorithm, like so; openssl req -new -x509 -sha512 -nodes -out server.crt -keyout server.key Simples! Now, you should be able to confirm the signature algorithm used is sha512 by looking at the details tab of certificate Notes If you change your certificate, be sure to reapply any private key permissions you require – such as allowing access to the application pool user.

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• Solved: Chrome v18, self signed certs and &ldquo;signed using a weak signature algorithm&rdquo;

  - by David Christiansen

  So chrome has just updated itself automatically and you are now running v18 – great. Or is it… If like me, you are someone that are running sites using a self-signed SSL Certificate (i.e. when running a site on a developer machine) you may come across the following lovely message; Fear not, this is likely as a result of you following instructions you found on the apache openssl site which results in a self signed cert using the MD5 signature hashing algorithm. The simple fix is to generate a new certificate specifying to use the SHA1 signature hashing algorithm, like so; openssl req -new -x509 -sha1 -nodes -out server.crt -keyout server.key Simples!

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• JavaFx a-t-il encore une chance de s'imposer face à Flash, Silverlight et l'émergence du HTML 5 ? Ou

  JavaFx a-t-il encore une chance de s'imposer Face à Flash, Silverlight et l'émergence du HTML 5 ? JavaFx a été lancé il y a trois ans pour développer des applications lourdes. Très vite, les développeurs l'ont utilisé pour des applications multimédias et pour faire du web java (notamment des Rich Internet Applications ou RIA). La plateforme - qui se compose du langage de script JavaFX, une plateforme pour client lourd et une intégration avec la machine virtuelle Java - entendait ainsi répondre ainsi aux besoins d'un marché où la compétition fait désormais rage avec, entre autres, des acteurs aussi importants que Flash de Adobe et Silverlight de Microsoft. Selon la

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• Virtual Developer Day: Oracle WebLogic Server & Java EE (#OTNVDD)

  - by Justin Kestelyn

  Virtual Developer Day is back with a vengeance! On Feb. 1, login to learn how Oracle WebLogic Server enables a whole new level of productivity for enterprise developers. Also hear the latest on Java EE 6 and the programming tenets that have made it a true platform breakthrough, and get hands-on with our VirtualBox virtual machine image! Even better, you never have to leave your desk - you'll get access to live sessions with chat support, and even 1-1 desktop sharing upon request. It's a no-brainer, get registered!

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• Bring the Windows 8 'Start Menu' back!

  - by ihaynes

  I've been using the the Windows 8 RTM from MSDN for a week but the more of my normal software I load onto the machine the more awkward it becomes using the new 'Metro' (yes I know that name is now not used) 'Start' screen. Yes, you can oraganise your programs in groups, or you can add them to the Quick Launch bar, or you can create alphabetic folders on the desktop but sorry Microsoft, none of these are as logical as the alphabetic Start menu of previous Windows versions.Fortunately the good people at Stardock have a solution in 'Start8', which brings the Start Menu we know and love back to Windows 8. It's still in Beta and the current one runs out in October. I'm looking forward to the final release and like lots of other users, I'll be happy to pay for this.Lets hope Microsoft either reinstate the Start Menu in the first service pack or gives us a usable alternative. In the meantime, here's an excellent solution.http://www.stardock.com/products/start8/

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• Find out if there is a local user logged in when logging in over ssh

  - by sebastiangeiger

  I need to run some calculations on a machine that I can only access remotely but also serves as a work station. There are many of them and I want to pick a "free" one. Free means in this case that no one is logged in locally. My first try was the who command, but for some reason it only lists "selected" users and I can't really find out how they are selected. Next try: ps aux | cut -d " " -f1 | sort | uniq: better showing a bunch of demons but also the local user that was not displayed by who. My current solution is to go in and do ps aux | grep "gnome-session" which is better but still gives me a lot of junk. Ideally I am looking for something that I can include in my ssh profile that warns me about (active) local users when I log in.

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• PXE-boot for Ubuntu 10.04 Desktop version

  - by omkar

  My aim is to Install the Ubuntu 10.04 desktop version on a remote machine using PXE-BOOT. I'm trying to apply the steps given in PXE-BOOT for Ubuntu 9.10 . (I know this is for 9.10). In "Step 8. Setting Up Boot Files", it says cp -a /media/cdrom/install/netboot/* /tftpboot/ but I wasn't able to find the netboot folder in my Ubuntu 10.04 Desktop CD-Rom. Does that folder only exist in Ubuntu Server edition? Is it possible to do this in the Desktop edition?

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• Ubuntu 13.10 alongside Windows 7 - Mission Impossible?

  - by Przemek Jedlikowski

  I just want to install Ubuntu 13.10 alongside Windows 7 HP on my EeePC 1215N. I can't do it when Windows 7 is booted up (wubi.exe hasn't got that option), so I booted it from USB key. Everything's loaded, I double-click Install Ubuntu. I click 'Next ', then I choose that I want to install Ubuntu alongside Windows 7. And the machine restarts. Not resets. Restarts. X server's killed immediately, I can see the console only. What do I have to do now?

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• What can I use to set up a 100% cloud based python IDE + Hosting environment?

  - by PhD

  I'm working a side project and I can't always be on "my" machine to code/deploy the web application. I am aware of various cloud IDEs (e.g., Cloud 9 IDE) and independent Django/Flask etc., hosting services (e.g., Heroku). What is the best way to completely shift my development/deployment environment to the cloud so that I can code/deploy from anywhere? I don't mind using paid services but I'm not sure which cloud IDEs play nice with which hosting services. Has anyone tried this setup before? What has or hasn't worked? I want to minimize the manual intervention in 'connecting the two services' as much as possible. I'm going to be using Django, MySQL and Redis for the web-app

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• Ubuntu 12.04 Touchscreen Calibration

  - by Lee

  I have a machine with Ubuntu 12.04 installed, with dual monitor, via VGA and DVI Interface. The monitor is one touch screen and the other one is regular LCD Monitor. The touch screen is made in China with some unknown brand, and I am using eGalax Driver. The touch screen is now detected and works, but i need to do some calibration since it does not correctly perform click on touch. The problem is, when I’m using xinput_calibrator, it shows 4 crosses to be clicked on, because I’m using dual monitor, the crosses is now show 2 on the touch screen (touchable) and the others on the other monitor which is regular non-touch monitor. Please help, thank you.

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• How can I run Tellme more software on Ubuntu 14.04 LTS?

  - by Alex Walker

  I'm new to Ubuntu and I've been loving it so far, I have it on my 2 computers and I think everyone should try it. I run an English Laboratory in a University (Our PC's are old and slow) so I want to install Ubuntu on all of them so the students can have a better experience here, the problem is tha we NEED Tell me more Software which I believe it's only for windiws. How can I install it in ubuntu? do I need wine or a virtual machine with Windows? please help! and thank you so much!!

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• Why do HDFS clusters have only a single NameNode?

  - by grautur

  I'm trying to understand better how Hadoop works, and I'm reading The NameNode is a Single Point of Failure for the HDFS Cluster. HDFS is not currently a High Availability system. When the NameNode goes down, the file system goes offline. There is an optional SecondaryNameNode that can be hosted on a separate machine. It only creates checkpoints of the namespace by merging the edits file into the fsimage file and does not provide any real redundancy. Hadoop 0.21+ has a BackupNameNode that is part of a plan to have an HA name service, but it needs active contributions from the people who want it (i.e. you) to make it Highly Available. from http://wiki.apache.org/hadoop/NameNode So why is the NameNode a single point of failure? What is bad or difficult about having a complete duplicate of the NameNode running as well?

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• Tweaks to allows maximum number of users to login to ubuntu server.

  - by nixnotwin

  I use ubuntu server 10.04 on a fairly good machine, with 2.40 duel-core processor and 2GB RAM. My users login with ssh or samba. I have setup LDAP with PAM to sync user accounts between unix and samba. When I allowed about 90 users to login over ssh at once the server refused login for many users. I am using dropbear as ssh server. Even samba logins failed for many users. I need to allow at least 100 users to login at once. Is there anyway to do this?

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• How can I run samba?

  - by depesz

  I have server running Ubuntu 10.10. Never used samba before, as I never had windows machines, but now I need it. So I did: apt-get install samba smbfs smbclient. Packages are installed, but I have no idea how to configure it. All howtos I found on the net relate to /etc/samba/something.conf, where I don't even have /etc/samba directory. The only config I found is /etc/default/samba, which contains (aside from comments) only: RUN_MODE="daemons" All I want is to be able to have access to some directories on the Ubuntu machine from Windows, nothing else.

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• How can I increase the maximum number of simultaneous users to log in to a server?

  - by nixnotwin

  I use ubuntu server 10.04 on a fairly good machine, with 2.40 dual-core processor and 2GB RAM. My users login with ssh or samba. I have setup LDAP with PAM to sync user accounts between unix and samba. When I allowed about 90 users to login over ssh at once the server refused login for many users. I am using dropbear as ssh server. Even samba logins failed for many users. I need to allow at least 100 users to login at once. Is there anyway to do this?

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• Copying an SSH Public Key to a Server

  - by Nathan Arthur

  I'm attempting to setup a git repository on my Dreamhost web server by following the "Setup: For the Impatient" instructions here. I'm having difficulty setting up public key access to the server. After successfully creating my public key, I ran the following command: cat ~/.ssh/[MY KEY].pub | ssh [USER]@[MACHINE] "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys" ...replacing the appropriate placeholders with the correct values. Everything seemed to go through fine. The server asked for my password, and, as far as I can tell, executed the command. There is indeed a ~/.ssh/authorized_keys file on the server. The problem: When I try to SSH into the server, it still asks for my password. My understanding is that it shouldn't be asking for my password anymore. What am I missing?

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• Unable to login following permission changes in device manager (11.10 + Gnome)

  - by Symanuk

  (Running Gnome 3 on Ubuntu 11.10) Everything working well (at least a couple of months), until recently when I changed the permissions through the device manager on the sda1 /2/ 3 drives, thinking it would save all the switching I seem to have to do between users in order to see / use files I previously copied across from an external drive. Now when I boot up the Ubuntu splash screen loads indefinitely, and if I go in through the GRUB / recover option, i'm getting a load of negative permission messages back (regardless of using the fsck or remount options) Either way = unusable machine (Laptop Dell Inspiron n5050), and no way through to login. I'm looking for: (1) a way back in so any help greatfully received (answers need to be pretty basic as i'm a novice), and (2) if i'm to learn anything, a decent thread on setting permissions within Ubuntu / Gnome 3. I'm new to both Ubuntu & Linux, so please be gentle!! Cheers

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• wkhtmltopdf displaying text as blocks

  - by making3

  We're using wkhtmltopdf in a web project (nodejs/compoundjs). We've gotten it working how we wanted on our machines (using the --use-xserver switch). However, when I try to run this on our Ubuntu server 12.04 (without the ubuntu-desktop package), the PDF cannot use the switch. When we disable the switch, the PDF displays any characters as blocks (image below). How do I resolve this without installing ubuntu-desktop and running x server? I've found liberation fonts, which installing ttf-liberation and fonts-liberation did not help. And urw-fonts, but I have yet to find an Ubuntu equivalent. EDIT: It just hit me, this doesn't matter if I'm on the server or not. On my development machine (Ubuntu 13.04 desktop), I can run the following, which produces the same blocks: wkhtmltopdf http://google.com google1.pdf While this prints out the pdf properly: wkhtmltopdf --use-xserver http://google.com google2.pdf My version of wkhtmltopdf is 0.12.0.

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• How do I install xulrunner in 12.04?

  - by chessplayer

  I am trying to migrate a virtual machine I use for my classes at the university from 10.04 to 12.04 and in that I am using xulrunner so that first, I can have SQLiteManager as a stand alone app next, KNIME can provide help for its nodes I tried adding the the mozilla ppa as described in some posts, e.g. here or here, but when I search for xulrunner in Synaptic I get no match. I read in this link, that xulrunner was left out intentionally, which, frankly, I think is a bad decision! Anyway, does anyone know a way out of this, i.e. how to get xulrunner for 12.04? Any help appreciated!

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• Numbers on the launcher

  - by pete of ebor

  Using 12.04 LTS - few days ago, I left my machine on while I went out. On my return, the launcher was showing (it is set to be hidden) and there were small numbers 1-9 on the icons and letters s on the bottom-most icon and t on the rubbish bin. System still worked fine, although the launcher remained visible, and would not hide. After about 20 mins work, they suddenly vanished and the launcher hid itself.. is this a normal action ? It hasn't happened since..

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• Confusion installing mongodb manually because of sitting behing a proxy

  - by black sensei

  I am forced to install mongodb manually on an Ubuntu server because the machine sits behind a proxy and there is no way to temporary open port 11371 for key exchange to happen. I am following this official mongoDB tutorial. So I downloaded the tgz and extracted it in /usr/local/bin/mongodb. Where I got confused is when assigning the ownership of the /data/db to the user mongo. So who creates the user mongo? How to get control-scripts working?

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• Random freezes on MBP9,2 + Ubuntu 12.04

  - by EnToutCas

  I have a MBP9,2 (mid-2012) at work. I put Ubuntu 12.04 on it after some efforts. Everything works more or less now, except I get random freezing every now and then. I have to power off the machine to restore it. Wondering if anyone had the similar issue. My setup: MacBook Pro 9,2 (mid 2012) Ubuntu 12.04 (installed using the special image for Macs) No proprietary drivers xmonad on Unity 2D So far the freezes look to be sporadic and spontaneous.

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