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  • Whats the greatest most impressive programing feat you ever witnessed? [closed]

    - by David Reis
    Everyone knows of the old adage that the best programmers can be orders of magnitude better than the average. I've personally seen good code and programmers, but never something so absurd. So the questions is, what is the most impressive feat of programming you ever witnessed or heard of? You can define impressive by: The scope of the task at hand e.g. John single handedly developed the framework for his company, a work comparable in scope to what the other 200 employed were doing combined. Speed e.g. Stu programmed an entire real time multi-tasking app OS on an weekened including its own C compiler and shell command line tools Complexity e.g. Jane rearchitected our entire 10 millon LOC app to work in a cluster of servers. And she did it in an afternoon. Quality e.g. Charles's code had a rate of defects per LOC 100 times lesser than the company average. Furthermore he code was clean and understandable by all. Obviously, the more of these characteristics combined, and the more extreme each of them, the more impressive is the feat. So, let me have it. What's the most absurd feat you can recount? Please provide as much detail as possible and try to avoid urban legends or exaggerations. Post only what you can actually vouch for. Bonus questions: Was the herculean task a one-of, or did the individual regularly amazed people? How do you explain such impressive performance? How was the programmer recognized for such awesome work?

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  • Can't install Parallels Tools on Debian 7.2.0

    - by jfm429
    (Parallels Desktop 9, latest version) As per instructions, I switch to root: $ su - root $ whoami root $ echo $EUID 0 and then execute the installer: $ cd /media/cdrom0 $ ./install and I get this error: sudo: unable to execute ./install: Permission denied What? I'm root! What's with this? I double check to make sure the execute bit is set: $ ls -lA | grep install$ -r-xr-xr-x 1 root root 17284 Oct 25 09:22 install Yep. People online are saying that you need to drag the install script to the terminal after typing sudo. So I do that, and this command is what's formed: $ sudo '/media/cdrom0/install' sudo: unable to execute /media/cdrom0/install: Permission denied What's the solution here?

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  • How to convert eps file to a large jpeg image

    - by Anand
    Hello, I am using Linux. I want to convert an eps file to jpeg file. I find that I can use "convert" command. However, the resulting image looks very small. I want to enlarge the jpeg file by -resize option. It seems not to work. The resulting image is a pure black one. Do anyone has the same problem? Here are more details: 1: if I use convert -scale 1000x1000 your.eps your.jpg the resulting image looks like a low quality image. The eps vector image is not scaled properly. 2: if I use convert -geometry 300% your.eps your.jpg I get a pure black image. Here is my phf file: 2shared.com/document/RXl2Be-g/askquestions.html and my eps file: 2shared.com/file/qrmwKegj/askquestions.html Thank you very much for your help!

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  • How to safely backup MySQL using VSS-based backup solutions

    - by Rhyven
    One of my clients is running MySQL on a Windows Server 2008 system. Their regular backups are performed using StorageCraft's ShadowCopy, which uses the VSS service to perform backups of open files. Some investigation indicates that MySQL is not entirely VSS-aware, and that the tables need to be locked prior to the shadow operation, then unlocked afterwards. There is a post at http://forum.storagecraft.com/Community/forums/p/548/2702.aspx which indicates the steps that need to be performed, however the user had some difficulty in performing them and no follow up solution was ever posted. Specifically, they succeeded in writing a batch file to lock the database, however once the batch file returns from MySQL it drops the connection and thus relinquishes the lock. I'm looking for a method that I can send the MySQL command FLUSH TABLES WITH READ LOCK, then perform the backup, then send UNLOCK TABLES when the backup is complete. Alternatively, I can exclude the MySQL data storage folder from backup, and schedule a mysqldump backup into a folder that will then be backed up by VSS. Can I have some recommendations please?

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  • KVM Guest not reachable from host

    - by Paul
    Hello, I'm running Ubuntu server 9.10, installed KVM etc. Created the bridge network following instructions on help.ubuntu.com/community/KVM/Networking Created a windows 2008 guest using virt-install command line (using virt-manager GUI from a remote Ubuntu desktop would not let me select the ISO location). I can however use a remote virt-manager to connect to the guest and complete the windows install. Within windows 2008 I changed the IP address but cannot ping from outside world. The bridge network appears fine - I'm not sure what else to look at! Here is the interfaces file: The loopback network interface auto lo iface lo inet loopback The primary network interface auto eth0 iface eth0 inet manual # auto br0 iface br0 inet static address 60.234.64.50 netmask 255.255.255.248 network 60.234.0.0 broadcast 60.234.0.255 gateway 60.234.64.49 bridge_ports eth0 bridge_stp off bridge_fd 0 bridge_maxwait 0 auto eth1 iface eth1 inet static address 192.168.12.2 netmask 255.255.255.0 broadcast 192.168.12.255 The ip of the windows server is 60.234.64.52 What else should I check? Regards Paul.

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  • Problem with gmailfs

    - by user35529
    Hello(????????????) I've got a little with gmailfs. I'm trying to mount gmail accout as a local file system on my Debian Lenny using the following command. mount -t gmailfs none /mnt/gmail -o [email protected],password=mypassword,fsname=SixSixSix But it gives my garbage like this Ignored option :rw Traceback (most recent call last): File "/sbin/mount.gmailfs", line 166, in <module> main(mountpoint, namedOptions, useEncfs) File "/sbin/mount.gmailfs", line 92, in main gmailfs.main(mountpoint, namedOptions) File "/usr/lib/python2.5/site-packages/gmailfs.py", line 1175, in main server = Gmailfs(namedOptions,mountpoint,version="gmailfs 0.8.0",usage='',dash_s_do='setsingle') File "/usr/lib/python2.5/site-packages/gmailfs.py", line 611, in __init__ self.ga.login() File "/usr/lib/python2.5/site-packages/libgmail.py", line 316, in login raise GmailLoginFailure("Login failed. (Wrong username/password?)") libgmail.GmailLoginFailure: 'Login failed. (Wrong username/password?)' Username and Password are totally correct.

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  • Ubuntu Startup xsp4

    - by Chin Ye
    when i type in terminal command are working fine root@syscomp:/var/www/WebSite2# xsp4 xsp4 Listening on address: 0.0.0.0 Root directory: /var/www/WebSite2 Listening on port: 9000 (non-secure) Hit Return to stop the server. but i m using script in /etc/init/GPS_WebSite.conf when the script are running fine, but not running in background when the script run one time and then closed, that is why my mono server are not running all the time, this is my GPS_WebSite.conf script, what i need to change to be running forever in background? start on login-session-start script exec > /tmp/debug-my-script.txt 2>&1 sleep 10 cd /var/www/WebSite2 xsp4 end script

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  • Using ctrl-arrow keys with PuTTY and screen

    - by kbosak
    I searched and couldn't find a solution for this anywhere. I'm using PuTTY from Windows to connect to various servers where I run bash and screen. It seems bash works fine with ctrl-arrow keys to jump word-to-word on the command line but within screen it's not working. Not in screen, ctrl-left sends "^[OC and ctrl-right is "^[OD". Within screen I instead get "^[[C" and "^[[D", which appears to be the codes for just the left/right arrow keys. Is there any way to get screen to recognize ctrl-arrow keys when using PuTTY? (FYI, I don't remember having this problem when using gnu-terminal in linux instead of PuTTY).

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  • Why does my system use so much cache?

    - by Dave M G
    Previously, on my desktop computer running Ubuntu 14.04, I had 4GB RAM, which I thought should be plenty. However, after being on for a while, my computer would seem to get slow. I have a system resource monitor app in my Gnome panel, which I assume represents the available RAM (?). It shows a dark green area as being "Memory", and a light green area as "Cache". The "Cache" would slowly grow until it filled the whole graph, and then programs would get slow to load, or it would take a while to switch programs. I could alleviate the problem somewhat with this command, but eventually the computer cache fills up again, so it's only a bandaid: sudo sh -c "sync; echo 3 > /proc/sys/vm/drop_caches" So, I figured I'd get more RAM, so I replaced one 2GB stick with an 8GB stick, and now I have 10 GB ram. And my "cache" still slowly maxes out and my computer slows as a result. Also, sometimes the computer starts out with "cache" maxed when I first boot and log in. Not always though, I don't know if there's a pattern that determines why it happens. Why is Ubuntu using up so much cache? Is 10GB not enough for Ubuntu? Here's what my system monitor looks like in my Gnome panel. The middle square shows RAM usage. The light green area is the "cache": This is my memory and swap history, which doesn't seem to include any information about "cache". I realize at this point I'm not totally clear on the difference between "cache" and "swap":

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  • wxCam can't open /dev/dsp

    - by SIJAR
    I try to run wxCam through PulseAudio using the following command: $ padsp -d wxcam Although wxCam started ok, wxCam is been set to use xdiv format to enable sound during recording, but while recording the I get the error: Cannot open /dev/dsp. Video file will be recorded without audio track Please help me in fixing this issue. Below is some debug information: $ padsp -d wxcam Determining video4linux API version... Using video4linux 2 API VIDIOC_ENUM_FRAMESIZES: Invalid argument V4L2_CID_GAMMA is not supported Determining pixel format... pixel format: YUV 4:2:2 (YUYV) Found V4L2_PIX_FMT_YUYV pixel format pixel format: MJPEG Found V4L2_PIX_FMT_MJPEG pixel format --DEBUG: [wxcam] Generating standard Huffman tables for this frame. Corrupt JPEG data: 2 extraneous bytes before marker 0xd2 ... repeats a couple of times ... open of failed: No such file or directory --DEBUG: [wxcam] Generating standard Huffman tables for this frame. Corrupt JPEG data: 2 extraneous bytes before marker 0xd4 ... repeats a couple of times .... /home/sij/Videos/Webcam/video.avi written: 640x480, 1334396 bytes --DEBUG: [wxcam] Generating standard Huffman tables for this frame. Corrupt JPEG data: 2 extraneous bytes before marker 0xd3 ... repeats a couple of times ...

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  • bluetooth headset can connect, but not visible in pulse audio

    - by Kim Marivoet
    I have a plantronics bluetooth headset, and until yesterday I could use it without any problem. However, today it suddenly stopped working (maybe related to the last software update I did). I can still connect/disconnect my headset, but it doesn't show up in pulse audio anymore. I read through various posts that describes kind of the same problem, but none of the suggested solutions worked. I get following error in the syslog: Oct 13 16:49:57 desktop bluetoothd[1040]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/HFPAG Oct 13 16:49:57 desktop bluetoothd[1040]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/A2DPSource Oct 13 16:49:57 desktop bluetoothd[1040]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/A2DPSink Oct 13 16:50:09 desktop kernel: [ 17.340943] input: 48:C1:AC:08:FE:8F as /devices/virtual/input/input14 Oct 13 16:50:09 desktop bluetoothd[1040]: /org/bluez/1040/hci0/dev_48_C1_AC_08_FE_8F/fd0: fd(36) ready Oct 13 16:50:09 desktop rtkit-daemon[1894]: Successfully made thread 2213 of process 1892 (n/a) owned by '1000' RT at priority 5. Oct 13 16:50:09 desktop rtkit-daemon[1894]: Supervising 5 threads of 1 processes of 1 users. Oct 13 16:50:10 desktop bluetoothd[1040]: Badly formated or unrecognized command: AT+XEVENT=USER-AGENT,COM.PLANTRONICS,PLT_VOYAGERPRO,0109,27.90,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF Oct 13 16:50:10 desktop bluetoothd[1040]: Audio connection got disconnected Any help would be much appreciated. I'm using Ubuntu 12.04. Thanks, Kim

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  • How to create Raid 10 with megacli

    - by Henno
    I have OpenFiler storage server. Without installing Windows and MSM, I want to create raid10 array from disks 2 to 21. I have already successfully installed MegaCli to OpenFiler but I'm stuck in figuring out the correct command line for creating a raid 10 array. The documentations says that the syntax for creating a raid 10 is: MegaCli -CfgSpanAdd -r10 -Array0[E:S,E:S] -Array1[E:S,E:S] -aN My enclosure ID is 25, so: [root@linux-h5ut ~]# MegaCli -CfgSpanAdd -r10 -Array0[E25:S02,E25:S21] -Array1[E25:S02,E25:S21] WB Cached NoCachedBadBBU -a0 Invalid input at or near token E I have googled high and low but there doesn't seem to be any example doing raid10 with megaraid (only the syntax). Can anyone explain what is wrong?

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  • Why are there tons of PHP processes open on my server?

    - by fiftyeight
    Today I saw that a website of mine isn't working so I ssh'd to the server and executed ps -eF. I see about 200 PHP processes that are running all for 4 hours. Apache is built with mpm event and mod fcgid. I killed all the PHP processes and now it's running fine, why does this happen? is this expected behavior? I don't really understand how processes how Apache keeps track of the number of PHP processes and their process IDs, so it would be nice if someone can also give some reference when I can read about this. Also, I used the "ab" command (Apache Benchmark) to see if this happens all the time, so I ran it about 4-5 times with 30 concurrent requests and again there are like 150 PHP processes running, when I keep running "ab" now it doesn't spawn more processes and the website is still working. Please shed some light on this! Thank you :)

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  • Navigation keys on numeric keypad randomly stop working

    - by Tom Hughes
    Shortly after a restart, the arrow and navigation (Home, End...) keys on my numeric keypad will randomly stop working, and -- regardless of the state of the NumLock -- return only numbers. I notice this the most in browser applications (like this edit box) but the same effect is true on the command line and in desktop applications like Word. I swapped keyboards and now use a Microsoft keyboard (both are USB keyboards) but the same behavior persists. I also tried a clean boot to clean out startup programs but this made no difference. The separate arrow keys and navigation keys between the QWERTY keys and the numeric keypad work fine, but my strong preference (dating back to DOS and MS Flight Simulator) is to use the navigation keys in the numeric keypad.

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  • Installing gitlab on Debian 6.0.5

    - by helmus
    I am using following directions in an attempt to install gitlab on Debian 6.0.5 https://github.com/gitlabhq/gitlabhq/blob/stable/doc/installation.md I am getting an error when i'm running following command sudo -u gitlab bundle exec rake gitlab:app:setup RAILS_ENV=production WARNING: #<ArgumentError: Illformed requirement ["#<Syck::DefaultKey:0x00000004b52198> 1.1.4"]> # -*- encoding: utf-8 -*- Gem::Specification.new do |s| s.name = %q{carrierwave} s.version = "0.6.2" s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version= s.authors = ["Jonas Nicklas"] ....more error.... s.add_dependency(%q<mini_magick>, [">= 0"]) s.add_dependency(%q<rmagick>, [">= 0"]) end end WARNING: Invalid .gemspec format in '/usr/local/lib/ruby/gems/1.9.1/specifications/carrierwave-0.6.2.gemspec' Could not locate Gemfile Some pointers to what could cause this would be much appreciated, i have only little experience with RoR and it seems to be related to that.

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  • Why /home folder is missing from my backup archive created by tar?

    - by Konstantin Pereyaslov
    So I'm doing full backup of my VPS using the following command (as root, of course): tar czvf 20120604.tar.gz / Everything seems to be fine, all files seem to appear in the list. The size of archive is 6 Gb and gunzipped version is 11 Gb which includes /home, because I totally have 11 Gb of data on VPS. But when I try actually to unpack archive, or open it using mc or WinRAR, there's no /home folder. And WinRAR tells 20120604.tar.gz - TAR+GZIP archive, unpacked size 894 841 346 bytes. It can't be WinRAR's bug, because when I type tar xzvf 20120604.tar.gz, /home folder isn't unpacked either. Why is /home folder missing from my archive? And what can I do to include it there? tar --version outputs the following: tar (GNU tar) 1.15.1

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  • Use apt-get source on a debian repo without using /etc/apt/source.list

    - by Erwan Queffélec
    I'm trying to use apt-get source as a regular user on a debian squeeze system. I want to retrieve the sources for cyrus-imapd-2.4 from the testing/wheezy repository. apt-get source works without root privileges; however, it seems there is no way to get apt-get to fetch anything from a repository that is not in /etc/apt/sources.list. Is there any command line option, alternate sources.list file, environment variable that will get apt to work with a custom repository ? I do have root access so I could change the /etc/apt/sources.list, however I really do not want to do that for a number of reason.

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  • Visual SVN server Running but cannot access / browse repositories

    - by user1783560
    Operating System: Windows Web Server 2008 R2 Visual SVN Version: 2.5.7 Subversion: 1.7.7 Apache: 2.2.22 I freshly installed the Visual SVN latest version on the server and created one repository in it. In the server management window, it shows that the server is up and running but when I try to browse it in a web browser, it doesn't respond. I am not able to import my existing code into the repository: Error: Cannot connect to server open/browse the repository with either command localhost:81/svn OR http://www.myserver.com:81/svn OR http:// myIPAddress:81/svn Visual SVN log is clean. The last information in the server log is that "The server is listening to port 81.

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  • Apache only transferring partial content from a Samba share

    - by thaBadDawg
    I have an Apache server running on CentOS 5.3. It currently hosts 12 sites with no known issues. (I say this to point out that up to this point my Apache installation has performed flawlessly) I'm adding a new site where the DocumentRoot of the new VirtualHost is a Samba share. When at the command line of the server I can cp video.m4v ~ and the whole file is copied properly to my home directory. But when I try to access the file from IE/Firefox/Safari/Chrome it only passes back a partial result of 33k. The same thing is happening with my image and audio files. If I make the files local to the server by copying them from the share and then serving them up then the files transfer. Any ideas?

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  • MinGW MSYS ssh error: Could not create directory '/home/<username>/.ssh'

    - by SoldOut
    I have just installed a fresh MinGW installation on Windows 7 64bit using the Graphical User Interface Installer (the recommended approach) following the instructions given here and keeping the default options (i.e. installation in C:\MinGW) - hopefully without missing any steps or messing things up in any way. However, when running the ssh command, I get the following error: C:\Users\Diablossh username@host Could not create directory '/home/username/.ssh'. The authenticity of host 'username@host (host ip here)' can't be established. RSA key fingerprint is (fingerprint here). Are you sure you want to continue connecting (yes/no)? yes Failed to add the host to the list of known hosts (/home/username/.ssh/known_hosts). So, I basically have to confirm the connection every time. Why does this happen and how do I fix it?

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  • External HDD is always in use when trying to safely remove

    - by Mario De Schaepmeester
    I have a WD 1TB Elements external hard drive and every time I use the Windows 7 "safely remove" feature, it gives me a dialog telling that a process is using the disk. Using Sysinternals Process Explorer and the answer on this question (find everything with the drive letter) I get the following result: What is the $Extend folder and why is it in use? How can I disable it? I cannot remove it using the command line (access denied). Edit: I've followed the instructions over here and under the registry key HKLM\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToBackup I have a Multi-String Value named IgnoreNTFS with data \$Extend* /s But this does not make any difference. Also this question is not about a server. Additionally I can tell that I use a program called mkv2vob to convert video files with a Matroska container into something my PS3 will play. I convert the source files straight from my external HDD, but I would expect if this program does not release the lock on the HDD, surely it cannot be locked if the process isn't even running?

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  • The JavaServer Faces 2.2 viewAction Component

    - by Janice J. Heiss
    Life just got easier for users of JavaServer Faces. In a new article, now up on otn/java, titled “New JavaServer Faces 2.2 Feature: The viewAction Component,” Tom McGinn, Oracle’s Principal Curriculum Developer for Oracle Server Technologies, explores the advantages offered by the JavaServer Faces 2.2 view action feature, which, according to McGinn, “simplifies the process for performing conditional checks on initial and postback requests, enables control over which phase of the lifecycle an action is performed in, and enables both implicit and declarative navigation.”As McGinn observes: “A view action operates like a button command (UICommand) component. By default, it is executed during the Invoke Application phase in response to an initial request. However, as you'll see, view actions can be invoked during any phase of the lifecycle and, optionally, during postback, making view actions well suited to performing preview checks.”McGinn explains that the JavaServer Faces 2.2 view action feature offers several advantages over the previous method of performing evaluations before a page is rendered:   * View actions can be triggered early on, before a full component tree is built, resulting in a lighter weight call.   * View action timing can be controlled.   * View actions can be used in the same context as the GET request.   * View actions support both implicit and explicit navigation.   * View actions support both non-faces (initial) and faces (postback) requests.Read the complete article here.

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  • Lenovo B460e laptop Unknown filesystem

    - by Dinesh
    I got a Lenovo B460e laptop yesterday (given by the TN Govt). It has WINDOWS 7 Pro Set it up the way I liked it... all software drivers and all. I wanted extra drives, so I entered the WINDOWS diskadmin and changed my partition setup, by splitting and I did the partition setup in the installing proces, so I split my harddisk into 4 parts. So far so good. When I rebooted, I entered GRUB RESCUE MODE. In this mode I know the only command “ls”. Which gives like (hd0) (hd0,msdos5) (hd0,msdos4) (hd0,msdos2) (hd0,msdos1). This Lap does not have a CD drive, otherwise I could have formatted the OS and installed a new OS using WINDOWS 7 CD. Now I don’t know what I’m supposed to do. Any idea on how to fix this?

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  • Hardware needs for video conversion server

    - by artaxerxe
    I would need to build a Linux server that will have as its main task to perform the video conversion. For video conversion, the most likely I will use FFMpeg tool. Question: Can anyone tell me if for improving this automated video conversion a video card will improve the process or not? The idea is that I will get movies at a very high quality that I will need to be converted in formats available for different devices (iPhone, iPad, etc.). That conversion will be performed through a CLI (command line interface). I will need that conversion to be done in the least time possible (ok, that's a kind of saying, not an absolutely specified short time).

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  • Is there a way to change the default sound volume on startup in windows?

    - by Logan Dam
    I've got a Creative X-Fi Titanium running on Windows 8, which works great, but the drivers have this weird quirk where it sets my headphones volume at 30% every time I boot if I have fast boot enabled. If I disable fast boot then it remembers my previous volume but I don't want to disable fast boot any more (I have an SSD, I want to use it :P) I've asked a similar question here before but as you can see the only "solution" was to disable fast boot, which I don't want to do anymore. Is there a command line tool that will let me set my volume or something similar that I can chuck in a batch file and run on startup, or anything else similar?

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