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  • Explaining Git to someone new to revision control

    - by MaxMackie
    I've recently decided to jump into the whole world of revision control to work on some open source projects I have. I looked around (subversion, mercurial, git, etc) and found that Git seemed to make more sense conceptually to me. I've set everything up on my computer (opensuse) and made an account on gitorious (let me know if there is a more simple/better hosting provider). I understand Git from a conceptual point of view (work locally, commit to a local repo, others can now checkout from you, right?). But where does gitorious come into play? I commit to them as well as committing locally? Apart from conceptually, I don't quite understand HOW it works when it comes to making a local repository and running git init inside a folder and that HEAD file. Keep in mind I have never used any form of revision control ever before. So even the most basic concepts are foreign to me. As I post this, I'm also reading up and trying to figure it out myself.

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  • How to change resolution in Ubuntu 10.04, where xvinfo is showing no adapters present?

    - by YumYum
    I am trying to maximize my resolution where I have Resolution: 800x600 (4:3) and Refresh rate: 61Hz I tried the following, but it did not work: $ xvinfo X-Video Extension version 2.2 screen #0 no adaptors present $ cvt 1920 1080 # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync $ xrandr --newmode clever_name 173.00 1920 2048 2248 2576 1080 1083 1088 1120 $ xrandr -q Screen 0: minimum 640 x 480, current 800 x 600, maximum 800 x 600 default connected 800x600+0+0 0mm x 0mm 800x600 61.0* 640x480 60.0 clever_name (0x11d) 173.0MHz h: width 1920 start 2048 end 2248 total 2576 skew 0 clock 67.2KHz v: height 1080 start 1083 end 1088 total 1120 clock 60.0Hz $ xrandr --addmode default clever_name $ xrandr --output default --mode clever_name xrandr: Configure crtc 0 failed

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  • What software can I use to create a video of following type?

    - by Bond
    Here is a video on this link http://www.youtube.com/watch?v=kSx873lOgIc&feature=player_embedded#at=62 Someone among my bosses wants to create some thing similar to the video on above link and has asked me what software can they use to do the same.The purpose is to create educational content only.Which can have the demonstrations (animations ) and audio also running in backend. I am not clear as what software can be used for this on Linux or Windows. I have users which use Windows and Linux both. I have used video editing on Mac using Final Cut Pro but the video on the above link is not some thing which can be achieved with FCP.(Or may be I am not aware) I am looking solution for 1) Linux users 2) Windows users In case of Linux it is Ubuntu for some users and Fedora for some others. I am a Linux guy so I am specifically posting this question in terms of Ubuntu but I also need suggestions for Windows type of users.I have no clue of such video animations at all.

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  • Unable to connect with PPTP (From Windows 8 to Ubuntu 12.10)

    - by jaja
    I'm trying to connect using PPTP to my VPS. At first, I got the problem that my connection (Wlan, which is what I use to connect to the Internet) goes "limited" (I can't connect to the Internet) when I connect to the VPN. Then, I used to get some long message, something like you might be trying using L2TP. Then now it's back again to the "limited" problem. What's the solution to that problem? One thing I'm not sure of is what I put as my local IP address in "sudo nano /etc/pptpd.conf" Is it 127.0.0.1? I'm following this tutorial: http://thesinclairs.gotdns.com/blog/set-up-a-pptp-vpn-on-ubuntu-server/

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  • Server downtime - are these APC warnings the cause?

    - by DisgruntledGoat
    Yesterday I had a problem with my dedicated server (Ubuntu 10.04, LAMP). It wasn't down per se, but running incredibly slowly as if we had a massive overload of visitors (though I don't think we did). It's running smoothly again now. I've been checking through log files etc to see if I can find any issues, the only strange thing is a bunch of these errors, occurring at about the same time as the downtime: [apc-warning] Unable to allocate memory for pool. in [file] on line 49. And a bit later on: [apc-warning] GC cache entry '[file1]' (dev=2056 ino=8988092) was on gc-list for 3601 seconds in [file2] on line 746. Could these errors indicate the cause of the server slowdown, or are they simply a result of the server being slow in the first place? What would be the solution?

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  • Can't install software from Ubuntu software center

    - by Casbar
    I've been experimenting with Ubuntu 10.04(64bit) inside a VirtualBox VM. This isn't my first experience with Linux, but I'm still very much a Linux noob. Whenever I try to install software from the Ubuntu Software Center, the installation gets interrupted and I get a warning that this installation requires untrusted sources. I can install anything I want using apt-get, it's just the gui that doesn't work. I've done research on the issue and taken the following precautions with no result: under software sources Allowed Canonical partners Allowed source code Changed the download source to main server I get no errors when running an apt-get update. Can anyone shed some light on the issue?

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  • ubuntu: starting program with sudo on boot

    - by The.Anti.9
    I am trying to start xampp when the ubuntu starts on ubuntu 9.10. I tried going to system-preferences-startup applications adding it there, but it didn't work. I surmised it was because it needs to be started as root. I know you can make a startup script some how, but I'm not sure how to do it. How can I make it start xampp when the computer boots, even without logging in? FYI, the command for starting it is sudo /opt/lampp/lampp start

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  • Why can't I install Ubuntu 10.04 on a system that already has Ubuntu 8.04?

    - by Android Eve
    Ubuntu 10.04 is beautiful. I love it. I am dying to install it on my PC, alongside the existing Ubuntu 8.04 (from which I write this message right now). But... it won't let me! When I reach the partitioning stage (manual!) Ubuntu 10.04 sees my two HDDs as one RAID volume. It doesn't see all the partitions I already have in place in /dev/sda and /dev/sdb. Even Windows 7 doesn't behave like this... (yes, I actually managed to install Windows 7 64-bit in dual-boot configuration with Ubuntu 8.04 on this same system). Note: GParted on Ubuntu 10.04 (live CD) sees the partition intended for Ubuntu 10.04 (/dev/sda4) perfectly, but is unable to format it. Any idea how to solve this problem?

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  • Sporadic unspecific kernel panic

    - by koma
    I'm experiencing seldom (so far about once a month) hard crashes on our ubuntu server 10.04 LTS box. The box itself is quite old (Dell PowerEdge 750 from 2004, Pentium4 2.8 GHz). I set up netconsole after it crashed twice last thursday and was able to extract the following output: [ 9354.062473] invalid opcode: 0000 [#1] SMP [ 9354.062516] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/uevent [ 9354.062555] Modules linked in: ppdev adm1026 hwmon_vid i2c_i801 bridge stp dcdbas psmouse serio_raw netconsole configfs shpchp lp parport usbhid hid e1000 [ 9354.062685] [ 9354.062704] Pid: 3988, comm: rsync Not tainted 2.6.38-12-generic-pae #51~lucid1-Ubuntu Dell Computer Corporation PowerEdge 750 /0R1479 [ 9354.062773] EIP: 0060:[<c104fef1>] EFLAGS: 00010046 CPU: 1 [ 9354.062802] EIP is at check_preempt_wakeup+0x181/0x250 [ 9354.062826] EAX: 00000002 EBX: f2a10ccc ECX: 00000000 EDX: 00000002 [ 9354.062850] ESI: f1db71cc EDI: f1db71a0 EBP: f1dbdea8 ESP: f1dbde8c [ 9354.062875] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 9354.062900] Process rsync (pid: 3988, ti=f1dbc000 task=f1db71a0 task.ti=f1dbc000) [ 9354.062933] Stack: [ 9354.062951] 0053ea60 f7907680 f28da840 f2a10ca0 c153ea60 f7907680 c153ea60 f1dbdebc [ 9354.063019] c103f98a f2a10ca0 f7907680 00000001 f1dbdef8 c104f97f 00000000 f2f0bacc [ 9354.063088] f7904338 00000001 00000003 00000000 f2f0bacc 00000001 00000001 00000086 [ 9354.063157] Call Trace: [ 9354.063183] [<c103f98a>] check_preempt_curr+0x6a/0x80 [ 9354.063210] [<c104f97f>] try_to_wake_up+0x5f/0x3f0 [ 9354.063236] [<c1077a00>] ? hrtimer_wakeup+0x0/0x30 [ 9354.063261] [<c104fd64>] wake_up_process+0x14/0x20 [ 9354.063286] [<c1077a1d>] hrtimer_wakeup+0x1d/0x30 [ 9354.063310] [<c1077f4a>] __run_hrtimer+0x7a/0x1c0 [ 9354.063336] [<c107dbad>] ? ktime_get+0x6d/0x110 [ 9354.063360] [<c1078310>] hrtimer_interrupt+0x120/0x2b0 [ 9354.063390] [<c1535c36>] smp_apic_timer_interrupt+0x56/0x8a [ 9354.063418] [<c152f459>] apic_timer_interrupt+0x31/0x38 [ 9354.063446] [<c1520000>] ? mca_attach_bus+0x5/0xc0 [ 9354.063469] Code: 8b 9b 20 01 00 00 8b 86 24 01 00 00 3b 83 24 01 00 00 75 e6 85 db 0f 84 a3 00 00 00 89 da 89 f0 e8 75 f6 fe ff 83 f8 01 0f 85 00 <fe> ff ff 89 f8 e8 95 f9 fe ff 8b 5e 1c 85 db 0f 84 e4 fe ff ff [ 9354.063804] EIP: [<c104fef1>] check_preempt_wakeup+0x181/0x250 SS:ESP 0068:f1dbde8c [ 9354.064231] ---[ end trace 290689cea65aea7f ]--- [ 9354.064290] Kernel panic - not syncing: Fatal exception in interrupt [ 9354.064352] Pid: 3988, comm: rsync Tainted: G D 2.6.38-12-generic-pae #51~lucid1-Ubuntu [ 9354.064424] Call Trace: [ 9354.064481] [<c152c057>] ? panic+0x5c/0x15b [ 9354.064539] [<c15302bd>] ? oops_end+0xcd/0xd0 [ 9354.064539] [<c100d9e4>] ? die+0x54/0x80 [ 9354.064539] [<c152f926>] ? do_trap+0x96/0xc0 [ 9354.064539] [<c100ba00>] ? do_invalid_op+0x0/0xa0 [ 9354.064539] [<c100ba8b>] ? do_invalid_op+0x8b/0xa0 [ 9354.064539] [<c104fef1>] ? check_preempt_wakeup+0x181/0x250 [ 9354.064539] [<c144884d>] ? __kfree_skb+0x3d/0x90 [ 9354.064539] [<c1042ae7>] ? update_curr+0x247/0x2a0 [ 9354.064539] [<c10447bb>] ? update_cfs_load+0x11b/0x2d0 [ 9354.064539] [<c1042a25>] ? update_curr+0x185/0x2a0 [ 9354.064539] [<c152f6bf>] ? error_code+0x67/0x6c [ 9354.064539] [<c104fef1>] ? check_preempt_wakeup+0x181/0x250 [ 9354.064539] [<c103f98a>] ? check_preempt_curr+0x6a/0x80 [ 9354.064539] [<c104f97f>] ? try_to_wake_up+0x5f/0x3f0 [ 9354.064539] [<c1077a00>] ? hrtimer_wakeup+0x0/0x30 [ 9354.064539] [<c104fd64>] ? wake_up_process+0x14/0x20 [ 9354.064539] [<c1077a1d>] ? hrtimer_wakeup+0x1d/0x30 [ 9354.064539] [<c1077f4a>] ? __run_hrtimer+0x7a/0x1c0 [ 9354.064539] [<c107dbad>] ? ktime_get+0x6d/0x110 [ 9354.064539] [<c1078310>] ? hrtimer_interrupt+0x120/0x2b0 [ 9354.064539] [<c1535c36>] ? smp_apic_timer_interrupt+0x56/0x8a [ 9354.064539] [<c152f459>] ? apic_timer_interrupt+0x31/0x38 [ 9354.064539] [<c1520000>] ? mca_attach_bus+0x5/0xc0 Googling for this issue didn't really turn up anything useful (most stuff I found was related to btrfs, but I don't use that, although the module exists and is sometimes loaded). From experience it might have to do with relatively heavy I/O, as two of the panics happened during a backup procedure. Kernel is 2.6.38-12-generic-pae, but I'm pretty sure I also saw panics on 2.6.32. I meanwhile upgraded to 3.0.0-17-generic-pae and am waiting for the next crash ;-) I'm at a loss here, so any pointers where to look for the cause or what it could be would be great :-) Thanks !

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  • How do I change the console resolution of Ubuntu 9.10 Server running on VMWare?

    - by Raam Dev
    I'm running Ubuntu 9.10 Server in VMWare Fusion (on a Mac) and I'm having trouble changing the console resolution. It seems to be stuck on 640x480. Ubuntu 9.10 uses Grub2, so there is no /etc/grub/menu.lst. I tried adding vga=791 to the kernel parameters (both during boot and by adding it to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and then running update-grub2) and neither had any effect. When using vga=791, grub says that vga=791 is depreciated and that I should use gfxpayload=1024x768x16,1024x768 instead. However, that also does absolutely nothing. I have a feeling this problem is specific to running Ubuntu 9.10 in VMWare, but Google hasn't turned up anything.

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  • IE10 does not open .pdf

    - by user203298
    I can't open any PDFs in IE10 on Win7 64bit. I've tested with PDFs from Intranet / Internet / local file system, http and https. I've tested installing/uninstalling Acrobat Reader 11.0.03 and the Nitro PDF Reader. I've also tried enabling/disabling the Tools Internet Options Advanced Security Do not save encrypted pages to disk option. In Google Chrome PDFs are opened in the Acrobat Reader Plugin, but in IE10 the only thing I always get is a small cross in the top left corner of the browser. Can anybody help me?

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  • Audio input problem in Ubuntu 9.10

    - by Andrea Ambu
    My audio input is a mix of my mic output and my sound card output. I'd like it to be just my mic output. I was able to do so in Ubuntu 9.04 but the interface is 9.10 is totally changed and I tried every my creativity was able to think. It's really annoying when talking to other people over the internet because they keep hearing their voice back. I'm not sure I explained it in clear way so I'll give you an example: What I do: I put an mp3 on play or a video on youtube then open a recorder and start to talk on my mic. What happens: both my voice and audio from mp3/youtube get reordered, even if I put headphones volume to 0 (via hardware). What I'd like to happen: Only my voice should be recorded. I'm sure I'm missing some technical term, but that's the problem and I'd like to solve it in Ubuntu 9.10, any idea?

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  • How do I find the cause for a huge difference in performance between two identical Ubuntu servers?

    - by the.duckman
    I am running two Dell R410 servers in the same rack of a data center. Both have the same hardware configuration, run Ubuntu 10.4, have the same packages installed and run the same Java web servers. No other load. One of them is 20-30% faster than the other, very consistently. I used dstat to figure out, if there are more context switches, IO, swapping or anything, but I see no reason for the difference. With the same workload, (no swapping, virtually no IO), the cpu usage and load is higher on one server. So the difference appears to be mainly CPU bound, but while a simple cpu benchmark using sysbench (with all other load turned off) did yield a difference, it was only 6%. So maybe it is not only CPU but also memory performance. I tried to figure out if the BIOS settings differ in some parameter, did a dump using dmidecode, but that yielded no difference. I compared /proc/cpuinfo, no difference. I compared the output of cpufreq-info, no difference. I am lost. What can I do, to figure out, what is going on?

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  • How to make XP install ubuntu from USB?

    - by Apoorv
    I want to install ubuntu on my PC which is running windows XP right now. I have made my pen drive bootable and have loaded Ubuntu on it. When I insert the pen drive at the time of booting of my PC, nothing happens and windows XP starts normally instead of asking me if I want to boot from my pen drive. Also when, I entered my BIOS setting to change the boot order there was no option of pen drive as a boot device. Please suggest me a way to install the OS using my already made bootable pen drive. And there's no problem with my pen drive cause I have tried it on my friends PC and it worked normally. Thanks in advance

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  • Difference between key_buffers and recommendation

    - by Typeoneerror
    I'm looking to add a bit of memory to MySQL on a Linode VPS server on which I've got a small facebook (canvas app) PHP app using MySQL running. I'm not super familiar with MySQL optimization so I'm hoping to find a simple answer. I think I want to increase the key_buffer size (the default is 16M) to something like 32M to start, but I'm not sure if I need to tweak anything else as well. All I've done so far is increase the query_cache_size to 32M from 16M. There's also key_buffer under [mysqld] and key_buffer under [isamchk]. What are the difference between those two? If I have Linode 2048MB (http://www.linode.com) VPS, what would recommend I set the buffers to? I don't expect this site to have tons of visitors, but I'd like it to be as optimized as possible. Definitely way more heavy on the database access than PHP and very few HTTP requests.

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  • Java JRE: Setting default heap size

    - by AndiDog
    I'm having trouble with Java on a virtual server, it always gives me the following error: # java Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I first solved this by using the CACAO virtual machine (of OpenJDK, by putting it first in jvm.cfg), but then I run into problems with my web application (Play! framework based, gives me nasty LinkageErrors). So I cannot use that VM. Instead I'd like to just use the normal server VM and set -Xmx128M by default. How can I do that? Related: this question

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  • Verizon Fivespot firewall

    - by Patrick
    I have a Verizon Fivespot Wi-Fi router and am having issues connecting to the computer that uses it to get on the internet. I am able to connect to the Fivespot admin pages remotely and I am able to connect to the internet from the computer behind the Fivespot. There are two sections pertinent to this issue, Port Filtering And, Port Forwarding I've tried each individually and both together but cannot access anything through the router except for the admin page. I am trying to connect through SSH to an Ubuntu 10.04 box over wifi. I have called Verizon Tech Support but they were unhelpful, the person essentially read what it says on each screen without any elaboration. Any help is greatly appreciated!

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