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• "make" and "make install" never work

  - by Nirmik

  I have been trying it from a long time now and this time it got my nerves... The commands make and make install used to install a program from an extracted tar ball never work for some reason... The make command gives me the error- make: *** No targets specified and no makefile found. Stop. and the make install command gives me the error make: *** No rule to make target `install'. Stop. Why are these commands not executing? What should I do to solve this issue?

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• Is this Anti-Scraping technique viable with Crawl-Delay?

  - by skibulk

  I want to prevent web scrapers from abusing 1,000,000 on my website. I'd like to do this by returning a "503 Service Unavailable" error code for users that access an abnormal number of pages per minute. I don't want search engine spiders to ever receive the error. My inclination is to set a robots.txt crawl-delay which will ensure spiders access a number of pages per minute under my 503 threshold. Is this an appropriate solution? Do all major search engines support the directive? Could it negatively affect SEO? Are there any other solutions or recommendations?

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• C# Open Source software that is useful for learning Design Patterns

  - by Fathom Savvy

  In college I took a class in Expert Systems. The language the book taught (CLIPS) was esoteric - Expert Systems: Principles and Programming, Fourth Edition. I remember having a tough time with it. So, after almost failing the class, I needed to create the most awesome Expert System for my final presentation. I chose to create an expert system that would calculate risk analysis for a person's retirement portfolio. In short, the system would provide the services normally performed by one's financial adviser. In other words, based on personality, age, state of the macro economy, and other factors, should one's portfolio be conservative, moderate, or aggressive? In the appendix of the book (or on the CD-ROM), there was this in-depth example program for something unrelated to my presentation. Over my break, I read and re-read every line of that program until I understood it to the letter. Even though it was unrelated, I learned more than I ever could by reading all of the chapters. My presentation turned out to be pretty damn good and I received praises from my professor and classmates. So, the moral of the story is..., by understanding other people's code, you can gain greater insight into a language/paradigm than by reading canonical examples. Still, to this day, I am having trouble with everyday design patterns such as the Factory Pattern. I would like to know if anyone could recommend open source software that would help me understand the Gang of Four design patterns, at the very least. I have read the books, but I'm having trouble writing code for the concepts in the real world. Perhaps, by studying code used in today's real world applications, it might just "click". I realize a piece of software may only implement one kind of design pattern. But, if the pattern is an implementation you think is good for learning, and you know what pattern to look for within the source, I'm hoping you can tell me about it. For example, the System.Linq.Expressions namespace has a good example of the Visitor Pattern. The client calls Expression.Accept(new ExpressionVisitor()), which calls ExpressionVisitor (VisitExtension), which calls back to Expression (VisitChildren), which then calls Expression (Accept) again - wooah, kinda convoluted. The point to note here is that VisitChildren is a virtual method. Both Expression and those classes derived from Expression can implement the VisitChildren method any way they want. This means that one type of Expression can run code that is completely different from another type of derived Expression, even though the ExpressionVisitor class is the same in the Accept method. (As a side note Expression.Accept is also virtual). In the end, the code provides a real world example that you won't get in any book because it's kinda confusing. To summarize, If you know of any open source software that uses a design pattern implementation you were impressed by, please list it here. I'm sure it will help many others besides just me. public class VisitorPatternTest { public void Main() { Expression normalExpr = new Expression(); normalExpr.Accept(new ExpressionVisitor()); Expression binExpr = new BinaryExpression(); binExpr.Accept(new ExpressionVisitor()); } } public class Expression { protected internal virtual Expression Accept(ExpressionVisitor visitor) { return visitor.VisitExtension(this); } protected internal virtual Expression VisitChildren(ExpressionVisitor visitor) { if (!this.CanReduce) { throw Error.MustBeReducible(); } return visitor.Visit(this.ReduceAndCheck()); } public virtual Expression Visit(Expression node) { if (node != null) { return node.Accept(this); } return null; } public Expression ReduceAndCheck() { if (!this.CanReduce) { throw Error.MustBeReducible(); } Expression expression = this.Reduce(); if ((expression == null) || (expression == this)) { throw Error.MustReduceToDifferent(); } if (!TypeUtils.AreReferenceAssignable(this.Type, expression.Type)) { throw Error.ReducedNotCompatible(); } return expression; } } public class BinaryExpression : Expression { protected internal override Expression Accept(ExpressionVisitor visitor) { return visitor.VisitBinary(this); } protected internal override Expression VisitChildren(ExpressionVisitor visitor) { return CreateDummyExpression(); } protected internal Expression CreateDummyExpression() { Expression dummy = new Expression(); return dummy; } } public class ExpressionVisitor { public virtual Expression Visit(Expression node) { if (node != null) { return node.Accept(this); } return null; } protected internal virtual Expression VisitExtension(Expression node) { return node.VisitChildren(this); } protected internal virtual Expression VisitBinary(BinaryExpression node) { return ValidateBinary(node, node.Update(this.Visit(node.Left), this.VisitAndConvert<LambdaExpression>(node.Conversion, "VisitBinary"), this.Visit(node.Right))); } }

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• Cannot install ia32-libs on a 64 bit Ubuntu installation

  - by Swarnendu Biswas

  I am using a 64-bit installation of Oneiric. I need to install the ia32-libs package to get some applications (evince, adobe reader) to work. For example, adobe reader is giving the following error: error while loading shared libraries: libGL.so.1: cannot open shared object file: No such file or directory. However, I am not able to install it since it is showing a dependency on ia32-libs-multiarch, which in turn is showing a dependency on gstreamer0.10-plugins-good:i386. This in turn depends on few other packages. How can I install these packages safely and still meet all the dependencies.

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• Uninstalling GRUB from MacBook Air

  - by James Brooke

  So... I have a MacBook Air and I recently tried to install Ubuntu on my external HD. I booted Ubuntu from a flash drive and everything had gone fine. I turned off my computer and when I turned it on again I got a message of error and a "grub rescue" line to enter some code. I rebooted holding the "option" key and I selected the Mac partition and everything is fine with my system, but every time I start my system and I don't hold the "option" key, I get the same error and the grub rescue message. I just want things to go back to normal, as they were before I installed Ubuntu on my external HD (which, btw, presented a message that said there was no boot loader). What do I do?

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• Do I need a wifi card to have internet access?

  - 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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• cannot add movie file to pitivi

  - by niku

  when i try adding this movie file to pitivie i get the error as follows (i can play the file in mplayer just fine tho): Problem: An internal error occurred while analyzing this file: Could not find GStreamer caps mapping for FFmpeg codec 'h264', and you are using an external libavcodec. This is most likely due to a packaging problem and/or libavcodec having been upgraded to a version that is not compatible with this version of gstreamer-ffmpeg. Make sure your gstreamer-ffmpeg and libavcodec packages come from the same source/repository. Extra information: gstffmpegdec.c(1336): gst_ffmpegdec_negotiate (): /GstPipeline:Discoverer-file:///media/Data/pitivi/taw2.mkv/GstDecodeBin2:dbin/ffdec_h264:ffdec_h2645 Also, my system language is English, but regional format is set to German. mplayer installed in German, I want it in English tho... Thanks a lot for your help :) I know I'm a noob .

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• Ubuntu 13.04 on Lenovo G580 > built-in (web)cam not recognized

  - by user159295

  I've installed Ubuntu 13.04 on a Lenovo G580. Now I noticed that the built-in (web)cam is not being recognized. Does anybody know how to fix this and get the webcam running? Any help is appreciated! Thanks I've downloaded/installed the suggested program and the webcam is working within that program. However, when running Camera Test from the System Testing here's what happens: when clicking on "Test", there's NO image showing up a few seconds after clicking on "Test", an error message is popping up saying "Sorry, Ubuntu 13.04 has experienced an internal error" When going to Skype, video is enable and under "select webcam" there's "Lenovo EasyCamera (/dev/video0) as only option selected. But, Skype doesn't recognize the camera as there's no pictures. Any ideas on how to get this straightened out?

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• How to reduce errors in dynamic language such as python, and improve my code quality

  - by Martin Luo

  I post the origin question in stackoverflow, some people suggest me to post here I've always have trouble with dynamic language like Python. Several problems: Typo error, I can use pylint to reduce some of these errors. But there's still some errors that pylint can not figure out. Object type error, I often forgot what type of the parameter is, int? str? some object? Also, forgot the type of some object in my code. Unit test might help me sometimes, but I'm not always have enough time to do UT. When I need a script to do a small job, the line of code are 100 - 200 lines, not big, but I don't have time to do the unit test, because I need to use the script as soon as possible. So, many errors appear. So, any idea on how to reduce the number of these problems?

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• Powershell Run-As Script

  - by marc dekeyser

  Disclaimer: This script is not of my own making. I found it on a share somewhere and it is so handy I started using in a bunch of scripts. To the writer: If you're out there, somewhere, when you see this, thank you! Check if script is running as Adminstrator and if not use RunAs    # Use Check Switch to check if admin        param([Switch]$Check)        $IsAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()`        ).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")            if ($Check) { return $IsAdmin }        if ($MyInvocation.ScriptName -ne "")    {         if (-not $IsAdmin)         {             try            {                 $arg = "-file `"$($MyInvocation.ScriptName)`""                Start-Process "$psHome\powershell.exe" -Verb Runas -ArgumentList $arg -ErrorAction 'stop'             }            catch            {                Write-Warning "Error - Failed to restart script with runas"                 break                          }            exit # Quit this session of powershell        }     }     else     {         Write-Warning "Error - Script must be saved as a .ps1 file first"         break     } write-host "Script Running As Administrator" -foregroundcolor redWrite-host ""

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• 'module' object has no attribute 'PY2'

  - by ManikandanV

  I am using ubuntu 14.04, was trying to install python-memcache. I have got an error like Downloading/unpacking python-memcached Downloading python-memcached-1.53.tar.gz Cleaning up... Exception: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main status = self.run(options, args) File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 278, in run requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle) File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1229, in prepare_files req_to_install.run_egg_info() File "/usr/lib/python2.7/dist-packages/pip/req.py", line 292, in run_egg_info logger.notify('Running setup.py (path:%s) egg_info for package %s' % (self.setup_py, self.name)) File "/usr/lib/python2.7/dist-packages/pip/req.py", line 284, in setup_py if six.PY2 and isinstance(setup_py, six.text_type): AttributeError: 'module' object has no attribute 'PY2' Storing debug log for failure in /home/mani/.pip/pip.log I am getting the same error when installing Django-celery, pymongo etc

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• The layout page "~/Views/Shared/_Layout.cshtml" could not be found

  - by Rei Brazilva

  I got this error and I can't figure out what is going on. I am positive the _layout.cshtml resides in the shared folder and for the sake of trying things out, I moved to the Home folder and it then told that the Views/Home/_Layout.cshtml couldn't be found there either. So now I'm thinking the problem is in the call for this file for some reason. I'm not going to pretend I know ASP.NET MVC4, so please when you answer, explain it as you would to someone who is not familiar with the system at all. Believe it or not, this error came from tutorial #1 ha ha Here's the code to show that I did code it right: @{ ViewBag.Title = "Home Page"; Layout = "~/Views/Shared/_Layout.cshtml"; } And here is a picture of the location p.s. I did my research, Google has nothing and there is another question here but it was asked on 2008 with MVC3 which is completely different I am running ASP.NET MVC4 on Azure Thanks

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• Formalizing programmers errors

  - by Maksee

  Every one of us make errors leading to bugs. Once I wanted to start logging my errors for future analysis, probably mentioning project title, approximate time spent and the most important, the type of error. For example when I copy-pasted a fragment about 'x' and replaced every occurrence of 'x' with 'y' and forgot to replace a tiny piece, this goes to 'copy-paste error'. The usefulness of this approach depends on whether I can formalize my errors at all and probably minimizing the number of types to choose from. Otherwise I would start postponing, ignoring and so on so make this system useless. Are there existing research in this area, probably a known minimum set of errors? Maybe some of you already tried to implement something like this and succeeded/failed?

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• How to connect to a WCF service using IP of the host machine where the service is hosted?

  - by Kumar

  I have a secured WCF service (https://<MachineName>:sslport/services) self hosted in a machine. Different instances of same service are deployed in differnt machines. From a client app, I am able to connect to theses services through code, i.e. using ChannelFactory() with the same endpoint address. But if I try to access the service using the endpoint address as https://<ipAddress>:sslport/services replacing machines name with machine IP address, I am getting some error stating "could not establish trust relationship". I know this is an error caused by SSL certificate that it could not establish a trust relationship. Are there any settings or any possibilities to make this work?

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• Where would a spam bot be located?

  - by Tim

  I have a hosted website using a free hosting service, I received an email this afternoon saying that I have been suspended because my account has been compromised. Basically, someone is using my email account to mass send spam. I've changed all the passwords and everything but when my Gmail pulls the emails from the host it's still downloading loads of spam messages that show like this: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: [email protected] SMTP error from remote mail server after end of data: host 198.91.80.251 [198.91.80.251]: 554 5.6.0 id=23634-03 - Rejected by MTA on relaying, from MTA([127.0.0.1]:10030): 554 Error: This email address has lost rights to send email from the system ------ This is a copy of the message, including all the headers. ------ Return-path: <[email protected]> Received: from keenesystems.com ([66.135.33.211]:2370 helo=server211) by absolut.x10hosting.com with esmtpsa (TLSv1:RC4-MD5:128) (Exim 4.77) (envelope-from <[email protected]>) id 1TGwSW-002hHe-Lc for [email protected]; Wed, 26 Sep 2012 13:35:44 -0500 MIME-Version: 1.0 Date: Wed, 26 Sep 2012 13:35:43 -0500 X-Priority: 3 (Normal) X-Mailer: Ximian Evolution 3.9.9 (8.5.3-6) Subject: New staff members wanted at Auction It Online From: [email protected] Reply-To: [email protected] To: "Nadia Monti" <[email protected]> Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Message-ID: <OUTLOOK-IDM-9aed7054-6a3e-e1a4-1d5c-3e73377652a6@server211> Date : 26 September 2012=0ATime : 13:35=0ASender : Dennise Halcomb Head = Office Manager of RJ Auction Drop-Off Int.=0A=0ANice to meet you Nadia M= onti=0A=0ARJ ADO Ltd., a USA based company, offers a significant amount = of goods worldwide for our customers on eBay and other auction venues. = Our company's main target is to provide a suitable and cost-effective se= rvice for any person, company or fundraising company. The main purpose o= f the administrative assistant / sales support representative is to cont= ribute to the sales force and add convenience to our cost-effective serv= ice dedicated to individuals, businesses, and organizations worldwide. O= ur HR department obtained your resume from one of the various job-orient= ed websites just to offer you this post.=0A=0AWorking Schedule: This is = a part time and home-based offer. You won't need to spend more than 3 ho= urs each day. Your =0Aschedule will be flexible.=0A=0ASalary: At the end= of the trial period (it lasts for 1 month) you will be paid 1,800 EUR. = With the average volume of clients your overall income will raise up to = 3,000 EUR per month. After the trial period is over your base salary wil= l grow up to 2,500 EUR per month, so you will earn 5% commission from th= e transactions completed.=0A=0AWhere?: Italy Wide. As it is a stay at ho= me position all the communication will be carried out via email and via = phone.=0A=0ARequirements: Access to the internet during the workday and = basic microsoft office skills are needed. Basic knowledge of English is = required (most of the contacts will be in English).=0A=0ACosts and Fees:= There are NO costs at any time for our employees. All fees related to t= his position are covered by the RJ ADO Co. Ltd..=0A=0AFurther Hiring Pro= cess: If you are interested in position we offer, please reply to this e= mail and send us the copy of your resume for verification.=0A=0AAfter re= viewing all of the received applications we will reply to successful app= licants only. Then we'll offer to these successful applicants a position= within our firm on a trial period basis for one month beginning from th= e date you sign a trial agreement. During this trial period you will rec= eive full guidance and support. Employees on a one monthly trial period = are evaluated at least one week prior to the end of their trial. During = the trial, your supervisor can recommend termination. At the end of the = trial period, the supervisor can offer continued employment, extension o= f trial period, or termination. After the trial period you may ask for m= ore hours or continue full-time.=0A=0AIf you are interested in this posi= tion, just reply to this email and send any questions you have and the c= opy of your resume for verification.=0A=0AThank You,=0AHR-Manager of RJ = ADO Co. Ltd.=0A=0APermission Settings=0AYou have been referred to RJ Auc= tion Drop-Off If you feel you received this email in error or do not wis= h to receive future messages, please reply to this message with "remove"= in the subject field. We will immediately update our database according= ly. =0AWe apologize for any inconvenience caused.=0A=0ARJ Auction Drop-O= ff Co. Ltd. I'm not aware of how this has happened. I'm not sure how anyone could have got hold of my password. It's a simple wordpress install, at some point recently my host went down and there was a fresh install of wordpress with default admin accounts, I have a feeling it could be something to do with this. My question is, even though I've changed all my passwords it's all still happening, is there annywhere in paticular this script would be stored on my host. I really can't deal with having my hosting account suspended and my email account sending all this spam.

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• NetworkManager not populating resolv.conf

  - by Cerin

  I recently upgraded from 11.10 to 12.04, and now NetworkManager isn't populating /etc/resolv.conf when connecting to wireless networks, when it had been working perfectly in 11.10. I'm not seeing any explicit errors in either the NM UI or in syslog. How do I diagnose what's wrong? Edit: If I try to run resolvconf, I get the error "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing anything." What should it be a symlink to and/or how do I get NM to populate it? This says the symlink should point to /run/resolvconf/resolv.conf, but that file does not exist on my system.

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• How to Inspect Javascript Object

  - by Madhan ayyasamy

  You can inspect any JavaScript objects and list them as indented, ordered by levels.It shows you type and property name. If an object property can't be accessed, an error message will be shown.Here the snippets for inspect javascript object.function inspect(obj, maxLevels, level){  var str = '', type, msg;    // Start Input Validations    // Don't touch, we start iterating at level zero    if(level == null)  level = 0;    // At least you want to show the first level    if(maxLevels == null) maxLevels = 1;    if(maxLevels < 1)             return '<font color="red">Error: Levels number must be > 0</font>';    // We start with a non null object    if(obj == null)    return '<font color="red">Error: Object <b>NULL</b></font>';    // End Input Validations    // Each Iteration must be indented    str += '<ul>';    // Start iterations for all objects in obj    for(property in obj)    {      try      {          // Show "property" and "type property"          type =  typeof(obj[property]);          str += '<li>(' + type + ') ' + property +                  ( (obj[property]==null)?(': <b>null</b>'):('')) + '</li>';          // We keep iterating if this property is an Object, non null          // and we are inside the required number of levels          if((type == 'object') && (obj[property] != null) && (level+1 < maxLevels))          str += inspect(obj[property], maxLevels, level+1);      }      catch(err)      {        // Is there some properties in obj we can't access? Print it red.        if(typeof(err) == 'string') msg = err;        else if(err.message)        msg = err.message;        else if(err.description)    msg = err.description;        else                        msg = 'Unknown';        str += '<li><font color="red">(Error) ' + property + ': ' + msg +'</font></li>';      }    }      // Close indent      str += '</ul>';    return str;}Method Call:function inspect(obj [, maxLevels [, level]]) Input Vars * obj: Object to inspect * maxLevels: Optional. Number of levels you will inspect inside the object. Default MaxLevels=1 * level: RESERVED for internal use of the functionReturn ValueHTML formatted string containing all values of inspected object obj.

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• HDMI sound gone, can't figure out how to turn it back on

  - by Oli

  I have had an Acer Revo box as a media centre for a while. I recently installed Ubuntu Server (10.10) on it and polished it up with nodm (one of the most simple ways to launch an X session) and installed boxee. It's been working fine for over a month. It's just running ALSA. I've had problems with PulseAudio/Boxee/HDMI before so I wanted to keep it simple. And that worked. It pushed both PCM and digital (AAC and various Dolby codecs) over HDMI perfectly. But I restarted it the other day after mucking around with some nfs configuration and now there isn't any sound. The hardware is an ION chipset. Nvidia 9400M graphics with Nvidia MCP79/7A audio. One thing I have noticed is there doesn't appear to be any sign of a IEC958 device. A traditional fix in the past for fresh installs has been to load alsamixer, find the IEC device and toggle its mute but I can't. I'm certain this used to represent the HDMI output. It just doesn't seem to exist any more unless I run sudo alsa-utils restart while boxee is running, when I see it in an error message: * Shutting down ALSA... [ OK ] * Setting up ALSA... * warning: 'alsactl restore' failed with error message 'alsactl: set_control:1388: Cannot write control '2:0:0:IEC958 Playback Default:0' : Operation not permitted'... ...done. When nodm (and thus boxee) aren't running, I don't see this error but alsamixer still doesn't show the IEC channel. aplay -l gives: card 0: NVidia [HDA NVidia], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] Subdevices: 0/1 Subdevice #0: subdevice #0 Its section in lshw reads: *-multimedia description: Audio device product: MCP79 High Definition Audio vendor: nVidia Corporation physical id: 8 bus info: pci@0000:00:08.0 version: b1 width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list configuration: driver=HDA Intel latency=0 maxlatency=5 mingnt=2 resources: irq:22 memory:fae78000-fae7bfff I was running on the stock PAE kernel but now it's running on 2.6.37.1. I upgraded to see if that fixed things; it didn't. I'm considering a reinstall but I hate doing that because a) there's a bit of custom configuration in getting X and Boxee to start on boot and b) I don't know what the problem is. If I reinstall this time, I'll end up doing that every time the sound breaks. I love Ubuntu but I don't want to install it once a month. Is there any way to forcibly reset all alsa settings and restart from scratch (without doing a reinstall)? Any other tips? If you need more information, just ask.

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• GTK applications do not start

  - by Greg

  Hello, I have a fresh install of Ubuntu 10.04 Server on nodes of a computational cluster, and I access the nodes via ssh. I configured a X server, which I start with the command startx -- -ac. The server is running fine on port :0. Then, I set the environment variable DISPLAY to :0. Now, when I run a GTK application on the node, it fails with the following error: Error: Unable to initialize gtk, is DISPLAY set properly? Now, my question is, is there any runtime library that I need for running GTK applications on top of a X server? I'm probably missing something obvious here, but I can't tell what :P

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• How to mount read-only filesystem as read-write?

  - by Eric

  this is my problem. I have a USB drive which somehow was set as read-only. I want to set it as read write then format it. sudo chown -R eric /dev/sdb Seems to go through, but when I view the drive in Nautilius it says Error mounting: mount: block device /dev/sdb1 is write-protected, mounting read-only mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful inf.o is found in syslog - try dmesg | tail or so. Thanks in advance!

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• How to add a link group to update-alternatives?

  - by Kurtosis

  Is it possible to add a custom link group to update-alternatives that is not already there by default? For example, I want to add Scala and all its supporting binaries as a link group 'scala'. I'm trying using this script, but keep getting the error: update-alternatives: error: unknown argument `' I'm not sure what that means, but after troubleshooting the script a bit with no luck, I'm wondering if update-alternatives has a hard-coded list of link groups, that can't be added to, and that doesn't include scala. PS - any chance someone with higher karma can create an update-alternatives tag? Seems this topic gets a decent number of questions, but no tag for it.

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• How do I handle "Firmware file X not found" stopping bootup?

  - by John Baber

  I recently upgraded my desktop mac to Precise and now can't get past the Ubuntu 12.04 splash page. The splash freezes with [ 19.931097] b32-phy0 ERROR: Firmware file "b43/ucode16_mimo.fw" not found [ 19.9311126] b32-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all instructions on this website. written on it This is when I choose 3.2.0-generic from the grub menu. If I choose to load up older kernels, I still get the same thing. How can I make my computer finish booting again? I'm able to ssh into the machine and poke around, but the actual screen freezes at the splash.

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• Mount to /dev/sdb1 without password

  - by Jarmo

  I am unable to mount a USB drive (or SD card) to my system without root access. When I plug in a USB drive, it is visible in the left column of Nautilus, but when I click on it to open it, I receive the error message Unable to mount 2.1 GB Filesystem Error mounting: mount exited with exit code 1: helper failed with: mount: only root can mount /dev/sdb1 on /media/sdb1 I am able to mount the drive using sudo mount -w /dev/sdb1, but this causes problems for operations such as creating startup discs, which requires unmounting and remounting the drive. I suspect this problem may be caused by the fact that when I upgraded from 11.10 to 12.04, I had an SD card plugged in. This caused the system to stall during later startups, as it could not find this drive. I remedied this by editing a line of /etc/fstab to read /dev/sdb1 /media/sdb1 vfat noauto 0 0 However, I am dual booting Ubuntu with Windows XP, and I have no problem mounting the C: drive of the Windows system without root access, so I feel that this is a problem related to the mount point rather than mounting in general.

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• How do I reset my Ubuntu user password?

  - by Myself

  I lost my Ubuntu user account password... I saw some other questions on this topic that had answers telling me to restart the computer, press the left shift key after BIOS, go to root, type "passwd [username]" and all this other stuff, but none of that worked. After I typed a new password and retyped it, it gave me an error message saying something like "Authentication Manipulation Error." There was another question complaining about this, but there weren't any useful answers that worked. Does anybody know of a way for me to retrieve or reset my password? Am I doing something wrong with that method I mentioned?

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• install wireshark 1.8.3 in ubuntu 12.04

  - by gene

  To enable capture traffic on multiple interfaces at once, I tried to install wireshark 1.8.3. However, I encountered the following errors: capture-pcap-util.c:274:1: error: static declaration of ‘pcap_datalink_name_to_val’ follows non-static declaration /usr/local/include/pcap/pcap.h:326:5: note: previous declaration of ‘pcap_datalink_name_to_val’ was here capture-pcap-util.c:289:1: error: static declaration of ‘pcap_datalink_val_to_name’ follows non-static declaration /usr/local/include/pcap/pcap.h:327:13: note: previous declaration of ‘pcap_datalink_val_to_name’ was here After doing some search, I found someone can fix it by reinstall libpcap-dev, or the following commands: step 1:rm & rmdir any file in '/usr/include/pcap';'/usr/local/include/pcap' step 2:Download libpcap by 'sudo apt-get install libpcap0.8-dev' step 3:./autogen.sh in wireshark dir step 4:make clean & make & make install However, neither is working on ubuntu 12.04/wireshark 1.8.3 Anyone can help?

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