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• How can I properly create /dev/dvd?

  - by chazomaticus

  Certain programs look for /dev/dvd by default to find DVDs. When I first boot my computer without a DVD inserted, /dev/dvd exists and points to the correct place (/dev/sr0). However, when I insert a DVD, /dev/dvd disappears. I'd like it to stick around so I don't have to navigate to /dev/sr0 in programs that are looking for DVDs. How do I ensure that the /dev/dvd symlink exists and points to the right place? It looks like I can add something to /etc/udev/rules.d/70-persistent-cd.rules. This site gives a couple of examples, but the 70-persistent-cd.rules file says "add the ENV{GENERATED}=1 flag to your own rules", which isn't part of the examples. The man 7 udev page is impenetrable to me, and I'm not convinced the linked page gives 100% of the information I need. So, what can I do on a modern, Ubuntu 12.04 (or later) system to make /dev/dvd always exist and point to the right device? EDIT: Is it as simple as adding ENV{GENERATED}=1 to the rules in the linked page, something like this: SUBSYSTEM=="block", KERNEL=="sr0", SYMLINK+="dvd", GROUP="cdrom", ENV{GENERATED}=1 Is that the right information for modern Ubuntu? What is ENV{GENERATED} doing there, when it wasn't generated, but hand-written?

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• Tipps & Tricks rund um CRSCTL

  - by Sebastian Solbach (DBA Community)

  Egal ob Single Instanz oder für Real Applikation Cluster Datenbanken die Grid Infrastruktur findet man bei immer mehr Systemen im Einsatz. Das liegt sowohl an der vereinfachten Überwachungstätigkeiten für die Oracle Datenbank, Listener und ASM Instanz, als auch an einigen weiterführenden Features, wie der einfachen Service Verwaltung für Single Instanz, DataGuard und/oder RAC. Dabei kommen insbesondere den Cluster Ready Services (CRS), einem Bestandteil der Clusterware Komponente der Grid Infrastruktur, eine wichtige Bedeutung zu, da diese intern alle Ressourcen steuert. Ressourcen können hierbei natürlich nicht nur die Oracle Prozesse (Datenbank, Listener, Virtuelle IP Adressen etc.) sein, sondern auch eigene Applikationen, die unter die Überwachung der Grid Infrastruktur resp. Clusterware gestellt werden. Dies kann von simplen Neustartanforderungen im Single Server Betrieb bis zu klassischen Failover Szenarien in Clusterumgebungen reichen. Diesem Aspekt trägt auch die Tatsache Rechnung, dass es seit einiger Zeit generische Applikations-Agenten (Siebel, Tomcat, GoldenGate, Apache, ...) für die Clusterware gibt und eine abgespeckte GI Installation auf der Oracle eigenen Middleware Hardware (Exalogic) läuft, um die Prozesse zu überwachen. Diese Cluster Ready Services werden vom Befehl "crsctl" gesteuert. Deshalb lohnt es sich dieses Utility mal genauer anzuschauen, zumal es einige Feinheiten enthält, die nicht direkt aus der Dokumentation bzw. Hilfe des Tools ersichtlich sind.

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• Problem with missing JSON functions on PHP 5.2.6 / Plesk 8.4

  - by Drachenviech

  I have a vserver running openSuse 10.3, Apache 2 and Plesk 8.4. I can update/upgrade neither, as it is apparently not recommended to upgrade openSuse 10.3 (and an update to the EOL 10.4 does not seem to make much sense) and Plesk fails to update no matter what version I try (even fails to upgrade to 8.4.1). Still I can live with that somehow, primarily because I don’t have the time to do a fresh remote install on the vserver. What really is a problem is, that though the installed PHP is 5.2.6 it has no zip library and no json functions. The first is probably because PHP was not compiled with --enable-zip. The second is a big mystery though. As I understand it, it always comes with PHP unless its compiled with the --disable-json configure option. This is however not the case. And the json extension module is just not there. I even tried to enable it with extension=json.so with no luck either. the configure options of my PHP are (as shipped with Plesk 8.4) '../configure' '--prefix=/usr' '--datadir=/usr/share/php5' '--mandir=/usr/share/man' '--bindir=/usr/bin' '--with-libdir=lib' '--includedir=/usr/include' '--sysconfdir=/etc/php5/apache2' '--with-config-file-path=/etc/php5/apache2' '--with-config-file-scan-dir=/etc/php5/conf.d' '--enable-libxml' '--enable-session' '--with-mm' '--with-pcre-regex=/usr' '--enable-xml' '--enable-simplexml' '--enable-spl' '--enable-filter' '--disable-debug' '--enable-inline-optimization' '--disable-rpath' '--disable-static' '--enable-shared' '--program-suffix=5' '--with-pic' '--with-gnu-ld' '--with-system-tzdata=/usr/share/zoneinfo' '--with-apxs2=/usr/sbin/apxs2' '--disable-all' '--disable-cli' As I understand it, PECL is not an option with 5.2.6. Or am I mistaken? Even if I was not, the openSuse repository only goes as far as PHP 5.2.4. The openSuse install even came without zypper, which I had to manually install. So is there a way to get ziplib and json running in PHP 5.2.6 without having to recompile the binary?

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• Basic is Best

  - by Eric A. Stephens

  Fellow foodies will recognize the recent movement towards "farm-to-table" restaurants. These venues attempt to simplify their menus and source ingredients as close to the source as possible. I had the opportunity to dine at such a restaurant the other evening. I was gushing about the appetizer to my server when she described the preparation for the item and then punctuated her comments with "basic is best". I reminded my fellow enterprise architect diners there was an architecture lesson in that statement. They rolled their eyes and chuckled. But they also knew I was right. I'm reminded of Frederick Brooks' book The Mythical Man Month and his latest The Design of Design. The former must read book talks about complexity. But he refrains from damning all complexity. The world we live in and enterprises we strive to transform with enterprise architecture are complicated organisms, much like the human body. But sometimes a simple solution is the best approach. Fewer applications (think: portfolio rationalization). Fewer components. Fewer lines of code. Whatever level of abstraction you are working at, less is more. I'm reminded of the enterprise architecture principle "Control Technical Diversity". At one firm I created pithy catch phrases for each principles. I named this one "Less is More". But perhaps another variation is what my server said the other night, "Basic is Best".

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• Daten-Fluthelfer

  - by A&C Redaktion

  „Schneller entscheiden als der Wettbewerb", so heißt der neue Sales Guide zum Thema Business Intelligence für Oracle Partner. Unter diesem Motto gibt die Broschüre auf nur zwölf Seiten einen soliden Überblick, wie man die ungeheuren Datenmengen, mit denen Unternehmen tagtäglich zu kämpfen haben, effizient analysieren und nutzen kann. Alles fängt bekanntlich ganz harmlos an: Langsam und fast unbemerkt steigen die Datenmengen, bis sie plötzlich zum schier unlösbaren Problem werden - und das auf mehreren Ebenen: Die Endanwender sind unzufrieden über lange Ladeprozesse, die Datenqualität und die Abfrageperformance Die Betriebskosten steigen mit dem erhöhten Administrations- und Wartungsaufwand Die Entwicklungsproduktivität ist gering, denn der manuelle Aufwand für Datenbereinigung und -strukturierung ist hoch und die Anbindung neuer Datenquellen zunehmend kompliziert Irgendwann ist es an der Zeit für eine Gesamt-Architektur, die die Zentralisierung von BI- und Warehouse-Komponenten ermöglicht. Der Sales Guide zeigt Lösungen auf, für die sich verschiedene große Unternehmen entschieden haben, darunter ein internationaler Finanzdienstleister und eine der größten Online-Auktionsplattformen. Der Sales Guide behandelt nicht nur die Probleme rund um das Datawarehousing, sondern bietet wie immer auch eine Handreichung zur Ermittlung des Kundebedarfs und zum vertrieblichen Vorgehen. Hier geht's zum Download (nur mit OPN-Passwort): Sales Guide BI und Datawarehouse Mit dem Dauerthema Business Intelligence setzen sich auch die Oracle Solutions Partner Communities auseinander.

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• polipo E: Sub-process /usr/bin/dpkg returned an error code (1)

  - by ICXC

  @me:/home$ sudo apt-get install polipo Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: polipo 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 198 kB of archives. After this operation, 799 kB of additional disk space will be used. Get:1 http://sy.archive.ubuntu.com/ubuntu/ precise/universe polipo amd64 1.0.4.1-1.1 [198 kB] Fetched 198 kB in 2s (97.5 kB/s) Selecting previously unselected package polipo. (Reading database ... 169595 files and directories currently installed.) Unpacking polipo (from .../polipo_1.0.4.1-1.1_amd64.deb) ... Processing triggers for doc-base ... Processing 1 added doc-base file... Processing triggers for man-db ... Processing triggers for install-info ... Processing triggers for ureadahead ... Setting up polipo (1.0.4.1-1.1) ... Starting polipo: Couldn't open config file /etc/polipo/config: 2. invoke-rc.d: initscript polipo, action "start" failed. ****dpkg: error processing polipo (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: polipo E: Sub-process /usr/bin/dpkg returned an error code (1)****

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• Any empirical evidence on the efficacy of CMMI?

  - by mehaase

  I am wondering if there are any studies that examine the efficacy of software projects in CMMI-oriented organizations. For example, are CMMI organizations more likely to finish projects on time and/or on budget than non-CMMI organizations? Edit for clarification: CMMI stands for "Capability Maturity Model Integration". It's developed by the Software Engineering Institute at Carnegie-Mellon University (SEI-CMU). It's not a certification, but there are various companies that will "appraise" your organization to various levels of CMMI, such as level 2 and level 3. (I believe CMMI level 1 is an animalistic, Hobbesian free-for-all that nobody aspires to. In other words, everybody is at least CMMI level 1, even if you've never heard of CMMI before.) I'm definitely not an expert, but I believe that an organization can be appraised for CMMI levels within different scopes of work: i.e. service delivery, software development, foobaring, etc. My question is focused on the software development appraisal: is an organization that has been appraised to CMMI Level X for software projects more likely to finish a software project on time and on budget than another organization that has not been appraised to CMMI Level X? However, in the absence of hard data about software-oriented CMMI, I'd be interested in the effect that CMMI appraisals have on other activities as well. I originally asked the question because I've seen various studies conducted on software (e.g. the essays in The Mythical Man Month refer to numerous empirical studies, as does McConnell's Code Complete), so I know that there are organizations performing empirical studies of software development.

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• Tech Article: Tired of Null Pointer Exceptions? Use Java SE 8's Optional!

  - by Tori Wieldt

  A wise man once said you are not a real Java programmer until you've dealt with a null pointer exception. The null reference is the source of many problems because it is often used to denote the absence of a value. Java SE 8 introduces a new class called java.util.Optional that can alleviate some of these problems. In the tech article "Tired of Null Pointer Exceptions? Use Java SE 8's Optional!" Java expert Raoul-Gabriel Urma shows you how to make your code more readable and protect it against null pointer exceptions. Urma explains "The purpose of Optional is not to replace every single null reference in your codebase but rather to help design better APIs in which—just by reading the signature of a method—users can tell whether to expect an optional value. In addition, Optional forces you to actively unwrap an Optional to deal with the absence of a value; as a result, you protect your code against unintended null pointer exceptions." Learn how to go from writing painful nested null checks to writing declarative code that is composable, readable, and better protected from null pointer exceptions. Read "Tired of Null Pointer Exceptions? Use Java SE 8's Optional!"

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• My first blog post…

  - by steveh99999

  I’ve been meaning to start a blog for a while now, (OK, for several years…..) - finally now, here it begins First post, something really simple but, a wise-man once told me about the best way to improve SQL server performance. Store Less Data. That's it.. that's all there is to it... Over the years, I've seen the following :- -  a 200Gb database which held 3 days data. Once business requirements changed, we were able to hold only 1 days data in this database. -  a table developed by DBAs to hold application table cardinality information - that information was collected at 2 hour intervals every day for 7 years ! After 7 years the DBA space-info table had become the largest table in the database - 60 million rows !  It was a simple change to remove alot of the historical intra-day data and change the schedule to run only once per evening. Suddenly that table held 6 million rows instead of 60 million.... - lots of backup and restore history held in msdb. See this post by Brent Ozar for more details on this issue. Imagine how much faster the backups, DBCC Checks and reindexes ran when the above 3 changes were implemented ?   How often do you review your big databases \ tables to see if you’re actually holding only data that is really required by the business ?

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• Password not working for sudo ("Authentication failure")

  - by Souta

  Before I mention anything further, DO NOT give me a response saying that terminal won't show password input. I'm AWARE of that. I'm typing my user password in (not a capslock issue), and for some reason it still says 'Authentication Failure'. Is there some other password (one I'm not aware of) I'm supposed to be using other than my user password? I've had this ubuntu before, on another hard drive and I didn't have this problem. (And it was the same ubuntu, ubuntu 12.04 LTS) ai@AiNekoYokai:~$ groups ai adm cdrom sudo dip plugdev lpadmin sambashare ai@AiNekoYokai:~$ lsb_release -rd Description: Ubuntu 12.04 LTS Release: 12.04 ai@AiNekoYokai:~$ pkexec cat /etc/sudoers # # This file MUST be edited with the 'visudo' command as root. # # Please consider adding local content in /etc/sudoers.d/ instead of # directly modifying this file. # # See the man page for details on how to write a sudoers file. # Defaults env_reset Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" # Host alias specification # User alias specification # Cmnd alias specification # User privilege specification root ALL=(ALL:ALL) ALL # Members of the admin group may gain root privileges %admin ALL=(ALL) ALL # Allow members of group sudo to execute any command %sudo ALL=(ALL:ALL) ALL # See sudoers(5) for more information on "#include" directives: #includedir /etc/sudoers.d I can log in with my password, but it's not accepted as valid for authentication <-- That is pretty much my issue. (Although, I haven't gone into recovery mode.) I've ran: ai@AiNekoYokai:~$ ls /etc/sudoers.d README And also reinstalled sudo with: pkexec apt-get update pkexec apt-get --purge --reinstall install sudo pkexec usermod -a -G admin $USER <- Says admin does not exist su $USER <- worked for me, however, my password still does not do much (in sense of not working for other things) I changed my password with pkexec passwd $USER. I was able to change it no problem. gksudo xclock was something I was able to get into, no problem. (Clock showed) ai@AiNekoYokai:~$ gksudo xclock

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• Packaging MATLAB (or, more generally, a large binary, proprietary piece of software)

  - by nfirvine

  I'm trying to package MATLAB for internal distribution, but this could apply to any piece of software with the same architecture. In fact, I'm packaging multiple releases of MATLAB to be installed concurrently. Key things Very large installation size (~4 GB) Composed of a core, and several plugins (toolboxes) Initially, I created a single "source" package (matlab2011b) that builds several .debs (mainly matlab2011b-core and matlab2011b-toolbox-* for each toolbox). The control file is just the standard all: dh $@ There is no Makefile; only copying files. I use a number of debian/*.install files to specify files to copy from a copy of an installation to /usr/lib/. The problem is, every time I build the thing (say, to make a correction to the core package), it recopies every file listed in the *.install file to e.g debian/$packagename/usr/ (the build phase), and then has to bundle that into a .deb file. It takes a long time, on the order of hours, and is doing a lot of extra work. So my questions are: Can you make dh_install do a hardlink copy (like cp -l) to save time? (AFAICT from the man page, no.) Maybe I should just get it to do this in the Makefile? (That's gonna b e big Makefile.) Can you make debuild only rebuild .debs that need rebuilding? Or specify which .debs to rebuild? Is my approach completely stupid? Should I break each of the toolboxes into its own source package too? (I'll have to do some silly templating or something, because there's hundreds of them. :/)

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• Cat all files in a directory, with a specific file at the beginning an end...?

  - by Aeisor

  Is there a way to cat all files in a given directory, but with a particular file at the beginning and end? For example, say I have: file1.js, file2.js, file3.js, file4.js, file5.js -- Effectively I would like to cat file2.js file*.js file3.js > /var/www/output.js I've tried a few variations of these find ! -name "file2.js" ! -name "file3.js" -type f -exec cat file2.js {} file3.js > /var/www/js/output.js \; find ! -name "file2.js" ! -name "file3.js" -type f | xargs -I files cat file2.js files file3.js > /var/www/output.js but the best I can get out of it is file2.js added before and file3.js added after all other files (multiple times) I know I could specify the files in the order I wanted manually, but this is not maintainable (I'm expecting, potentially 100 files). I have looked through man cat, as well as a handful of websites devoted to xargs, find and cat to no avail. Thanks in advance.

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• Should developers be involved in testing phases?

  - by LudoMC

  Hi, we are using a classical V-shaped development process. We then have requirements, architecture, design, implementation, integration tests, system tests and acceptance. Testers are preparing test cases during the first phases of the project. The issue is that, due to resources issues (*), test phases are too long and are often shortened due to time constraints (you know project managers... ;)). So my question is simple: should developers be involved in the tests phases and isn't it too 'dangerous'. I'm afraid it will give the project managers a false feeling of better quality as the work has been done but would the added man.days be of any value? I'm not really confident of developers doing tests (no offense here but we all know it's quite hard to break in a few clicks what you have made in severals days). Thanks for sharing your thoughts. (*) For obscure reasons, increasing the number of testers is not an option as of today. (Just upfront, it's not a duplicate of Should programmers help testers in designing tests? which talks about test preparation and not test execution, where we avoid the implication of developers)

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• External Full HD monitor and Virtual Desktop Size

  - by Stefan

  I have two FullHD monitors attached to my ATI graphics card [2]. The resolution of both of them is detected properly without any modifications to /etc/X11/xorg.conf. I can run both of them in clone mode. However, when I try to run them next to each other, I got the following error: The selected configuration for displays could not be applied. If tried to fix this according to [1]. My xorg.conf now looks like this: Section "Module" Load "glx" EndSection Section "Screen" Identifier "Default Screen" DefaultDepth 24 SubSection "Display" # The 1088 is the smallest multiple of 32 >= 1088 # see manpages Virtual 1920 1088 EndSubSection EndSection This does not seem to be parsed properly. After restarting X, I cannot set resolutions beyond 1600 or so any more. /var/log/Xorg.0.log gives: [ 15.676] (II) fglrx(0): Not using mode "1920x1080" (width too large for virtual size) [ 15.676] (II) fglrx(0): Not using mode "1680x1050" (width too large for virtual size) Are my modifications syntactically incorrect? According to the man page, it should be fine. Any ideas? OS: Ubuntu 11.10 64bit [1] http://askubuntu.com/a/75546/5023 [2] 01:00.0 VGA compatible controller: ATI Technologies Inc Juniper [Radeon HD 5700 Series]

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• Never Bet Against the Impossible

  - by BuckWoody

  My uncle used to say “If a man tells you that his car squirts milk in his eye when you lift the hood, don’t bet against that. You’ll end up with milk in your eye.” My friend Allen White tells me this is taken from a play (and was said about playing cards), but I think the sentiment holds, even in database work. I mentioned the other day that you should allow the other person to talk and actively listen before you propose a solution. Well, I saw a consultant “bet against the impossible”  the other day – and it bit her. She explained to the person telling her the problem that the situation simply couldn’t exist that way, and he proceeded to show her that it did. She got silent, typed a few things, muttered a little, and then said “well, must be something else.” She just couldn’t admit she was wrong. So don’t go there. If someone explains a problem to you with their database, listen with purpose, and then explore the troubleshooting steps you know to find the problem. But keep your absolutes to yourself. In fact, I have a friend that has recently sent me one of those. He connects to a system with SQL Server Management Studio (SSMS) version 2008 (if I recall correctly) and it shows a certain version number of the target system in the connection tab. Then he connects to it using SSMS 2008 R2 and gets a different number. Now, as far as I know, we didn’t change the connection string information, and that’s provided by the target system, so this is impossible. But I won’t tell him that. Not until I look a little more. :) Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• How do I make apt-get instal commands not display every package that is installing?

  - by rajlego

  When I install something on terminal, it often shows me a few things for status. For one, it shows download rate (which is fine). However, when I install something, it can display Unpacking libgranite2:amd64 (0.3.0~r732+pkg64~ubuntu0.3.1) ... Selecting previously unselected package slingshot-launcher. Preparing to unpack .../slingshot-launcher_0.7.6.1+r421+pkg32~ubuntu0.3.1_amd64.deb ... Unpacking slingshot-launcher (0.7.6.1+r421+pkg32~ubuntu0.3.1) ... Selecting previously unselected package contractor. Preparing to unpack .../contractor_0.3.1~r136+pkg22~ubuntu0.3.1_amd64.deb ... Unpacking contractor (0.3.1~r136+pkg22~ubuntu0.3.1) ... Selecting previously unselected package apport-hooks-elementary. Preparing to unpack .../apport-hooks-elementary_0.1-0~35~saucy1_all.deb ... Unpacking apport-hooks-elementary (0.1-0~35~saucy1) ... Processing triggers for hicolor-icon-theme (0.13-1) ... Processing triggers for libglib2.0-0:amd64 (2.40.0-2) ... Processing triggers for man-db (2.6.7.1-1) ... Setting up libgranite-common (0.3.0~r732+pkg64~ubuntu0.3.1) ... Setting up libgranite2:amd64 (0.3.0~r732+pkg64~ubuntu0.3.1) ... Setting up slingshot-launcher (0.7.6.1+r421+pkg32~ubuntu0.3.1) ... Setting up contractor (0.3.1~r136+pkg22~ubuntu0.3.1) ... Setting up apport-hooks-elementary (0.1-0~35~saucy1) ... Processing triggers for libc-bin (2.19-0ubuntu6) .. I would rather that not show up. I only want to see download rate, not all that other stuff. How do I do this? EDIT: I would also like the jargon to be stored somwehre else if something goes wrong, or for the jargon to just be expanable on terminal.

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• Can I set up samba so it automatically allows all the local usernames and passwords?

  - by dialer

  I have set up samba like this (this is the complete smb.conf): [global] log file = /var/log/samba/log log level = 2 security = user [homes] browsable = false read only = no valid users = %S I'd like to enable every user on server to access their home directories, but for some unknown reason only my 'administrator' account can do so. (I have done that with ftp before, but now smb is also needed). When I try to smbclient -L localhost -U [user], I get NT_STATUS_LOGON_FAILURE, except with the administrator (which is the user created during the ubuntu installation, not root). The samba log file says NT_STATUS_NO_SUCH_USER: [2012/04/04 20:26:02.081454, 2] smbd/reply.c:554(reply_special) netbios connect: name1=LOCALHOST 0x20 name2=DIALER-X 0x0 [2012/04/04 20:26:02.081733, 2] smbd/reply.c:565(reply_special) netbios connect: local=localhost remote=dialer-x, name type = 0 [2012/04/04 20:26:02.087200, 2] auth/auth.c:314(check_ntlm_password) check_ntlm_password: Authentication for user [public] - [public] FAILED with error NT_STATUS_NO_SUCH_USER I suspect that I have to manually create samba users, but the man pages state that If the client has passed a username/password pair and that username/password pair is validated by the UNIX system's password programs, the connection is made as that username. To me that sounds like as long as the provided username/password is a valid login on the server, it should work. Am I missing something totally obvious? I don't want / can't afford to manually update the samba users and passwords to match the server's. 11.10

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• Oracle Virtual Desktop Infrastructure

  - by Fat Bloke

  A lot of the recent blog entries here have been about Oracle VM VirtualBox, possibly the coolest personal desktop virtualization product known to man. Deploying VirtualBox on your PC or Mac lets you run many virtual desktops at the same time to one user, you. But did you know that VirtualBox can also power an Enterprise-scale virtual desktop deployment too, delivering many desktops to many users?  As part of another Oracle product, Oracle Virtual Desktop Infrastructure (VDI), VirtualBox can run your Windows, Linux or Solaris desktops on servers located in the datacenter. Oracle VDI orchestrates the whole deal by looking after : creating or cloning the virtual desktops from a master template; managing the lifecycle of the desktops (create, start, suspend, resume, stop, delete); assigning which users get which desktops;  delivering easy and fast access to these virtual desktops from almost any device, such as existing PCs or Macs, iPads, or specially designed Sun Ray client devices too; load balancing and session management of all of this.  Architecturally the solution looks something like this: This is an increasingly hot area of the IT landscape, so the Fat Bloke has decided to create a new blog category (VDI) and dedicate a few blog entries to look into this in a bit more detail over the next few weeks. Watch this space... - FB 

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• NFS mount of /var/www to OS X

  - by ploughguy

  I have spent 2 hours trying to create an NFS mount from my Ubuntu 10.04 LTS server to my OS X desktop system. Objective: three way file compare between the code base on the Mac, the development system on the local Linux test system, and the hosted website. The hosted service uses cpanel so I can mount a webdisk - easy as pie - took 10 seconds. The local Ubuntu box, on the other hand - nothing but pain and frustration. Here is what I have tried: In File Browser, navigate to /var/www/site and right-click. Select share this folder. Enter sharename wwwsite and a comment. Click button "Create Share". Message says - you can only share file systems you own. There is a message on how to fix this, but the killer is that this is sharing by SMB. It will change the LFs to CR-LFs which will affect the file comparison. So forget this option. In a terminal window, run shares-admin (I have not been able to convince it to give me the "Shared Folders" option in the System Administration window - Maybe it is somewhere else in the menu, but I cannot find it) define an NFS export. Enter the path /var/www/site, select NFS enter the ip address of the iMac and save. On the mac, try to mount the file system using the usual methods - finder, command line "mount" command - not found. Nothing. Tried restarting the linux box in case there is a daemon that needs restarting - nothing. So I have run out of stuff to do. I have tried searching the documentation - it is pretty basic. The man page documentation is as opaque as ever. Please, oh please, will someone help me to get this @38&@^# thing to work! Thanks for reading this far... PG.

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• How do I add a boot from cd option to yaboot?

  - by Sergiu

  So I'm dual-booting Ubuntu 12.04.1 on my iMac G5 powepc alongside Mac OS X and I want to add a boot cd option to yaboot because I'm trying to boot a scratched Mac OS X installation DVD that takes a while to read and the frst bootstrap moves on too fast. How do I edit the timeout for the first bootstrap anyways? So, my main question is, how do I add a cd booting option to yaboot and then, how doI boot it? The devalias from OpenFrmware tells me that 1 have 2 cd-rom instaled, on is /ht/pci@3/ata-6/disk@0 and the other on ends with a 1 instead of a zero. These are the contents of my yaboot.conf file: yaboot.conf generated by the Ubuntu installer run: "man yaboot.conf" for details. Do not make changes until you have!! see also: /usr/share/doc/yaboot/examples for example configurations. For a dual-boot menu, add one or more of: bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ boot="/dev/disk/by-id/scsi-SATA_ST3160023AS_5MT1GCWA-part2" device=/ht@0,f2000000/pci@3/k2-sata-root@c/@0/@0 partition=4 root="UUID=798a048f-ee48-49e0-bba3-111aed8dee04" timeout=12000 install=/usr/lib/yaboot/yaboot magicboot=/usr/lib/yaboot/ofboot enablecdboot macosx="/dev/disk/by-id/scsi-SATA_ST3160023AS_5MT1GCWA-part3" image=/boot/vmlinux label=Linux read-only initrd=/boot/initrd.img append="quiet splash" What do I add here so that yaboot will boot from my cd in like 3 minutes after startup? Thanks!

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• How do I make apt-get install commands not display every package that is installing?

  - by rajlego

  When I install something on terminal, it often shows me a few things for status. For one, it shows download rate (which is fine). However, when I install something, it can display Unpacking libgranite2:amd64 (0.3.0~r732+pkg64~ubuntu0.3.1) ... Selecting previously unselected package slingshot-launcher. Preparing to unpack .../slingshot-launcher_0.7.6.1+r421+pkg32~ubuntu0.3.1_amd64.deb ... Unpacking slingshot-launcher (0.7.6.1+r421+pkg32~ubuntu0.3.1) ... Selecting previously unselected package contractor. Preparing to unpack .../contractor_0.3.1~r136+pkg22~ubuntu0.3.1_amd64.deb ... Unpacking contractor (0.3.1~r136+pkg22~ubuntu0.3.1) ... Selecting previously unselected package apport-hooks-elementary. Preparing to unpack .../apport-hooks-elementary_0.1-0~35~saucy1_all.deb ... Unpacking apport-hooks-elementary (0.1-0~35~saucy1) ... Processing triggers for hicolor-icon-theme (0.13-1) ... Processing triggers for libglib2.0-0:amd64 (2.40.0-2) ... Processing triggers for man-db (2.6.7.1-1) ... Setting up libgranite-common (0.3.0~r732+pkg64~ubuntu0.3.1) ... Setting up libgranite2:amd64 (0.3.0~r732+pkg64~ubuntu0.3.1) ... Setting up slingshot-launcher (0.7.6.1+r421+pkg32~ubuntu0.3.1) ... Setting up contractor (0.3.1~r136+pkg22~ubuntu0.3.1) ... Setting up apport-hooks-elementary (0.1-0~35~saucy1) ... Processing triggers for libc-bin (2.19-0ubuntu6) .. I would rather that not show up. I only want to see download rate, not all that other stuff. How do I do this? EDIT: I would also like the jargon to be stored somwehre else if something goes wrong, or for the jargon to just be expanable on terminal.

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• How can one find software development work that involves directly the final end user?

  - by RJa

  I've worked in software development for 15 years and, while there have been signficant personal achievements and a lot of experience, I've always felt detached from the man/woman-on-the-street, the every day person, how it affects their lives, in a number of ways: the technologies: embedded software, hidden away, stuff not seen by the everyday person. Or process technology supporting manufactured products the size of the systems, meaning many jobs, divided up, work is abstract, not one person can see the whole picture the organisations: large, with departments dealing with different areas, the software, the hardware, the marketing, the sales, the customer support the locations and hours: out-of-town business parks away from the rest of society, fixed locations, inflexible: 9-5 everyday This to me seems typical of the companies I worked for and see elsewhere. Granted, there are positives such as the technology itself and usually being among high calibre co-workers, but the above points frustrate me about the industry because they detach the work from its meaning. How can one: change these things in an existing job, or compensate for them? find other work that avoids these and connects with the final end user? Job designs tend to focus on the job content and technical requirements rather than how the job aims to fulfil end user needs, is meaningful.

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• how to solve this problem

  - by Surbir

  root@me-desktop:~# sudo apt-get install aircrack-ng Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: aircrack-ng 0 upgraded, 1 newly installed, 0 to remove and 446 not upgraded. 1 not fully installed or removed. Need to get 1,579kB of archives. After this operation, 2,843kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu/ maverick/universe aircrack-ng i386 1:1.1-1 [1,579kB] Fetched 1,579kB in 1min 9s (22.7kB/s) Selecting previously deselected package aircrack-ng. (Reading database ... 520739 files and directories currently installed.) Unpacking aircrack-ng (from .../aircrack-ng_1%3a1.1-1_i386.deb) ... Processing triggers for man-db ... Setting up linux-image-3.0.1-030001-generic (3.0.1-030001.201108060905) ... Running depmod. update-initramfs: Generating /boot/initrd.img-3.0.1-030001-generic Warning: No support for locale: en_US.utf8 Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/dkms 3.0.1-030001-generic /boot/vmlinuz-3.0.1-030001-generic run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.0.1-030001-generic /boot/vmlinuz-3.0.1-030001-generic run-parts: executing /etc/kernel/postinst.d/nvidia-common 3.0.1-030001-generic /boot/vmlinuz-3.0.1-030001-generic run-parts: executing /etc/kernel/postinst.d/pm-utils 3.0.1-030001-generic /boot/vmlinuz-3.0.1-030001-generic run-parts: executing /etc/kernel/postinst.d/update-notifier 3.0.1-030001-generic /boot/vmlinuz-3.0.1-030001-generic run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.0.1-030001-generic /boot/vmlinuz-3.0.1-030001-generic exec: 15: update-grub: not found run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 2 Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-3.0.1-030001-generic.postinst line 1010. dpkg: error processing linux-image-3.0.1-030001-generic (--configure): subprocess installed post-installation script returned error exit status 2 Setting up aircrack-ng (1:1.1-1) ... Errors were encountered while processing: linux-image-3.0.1-030001-generic E: Sub-process /usr/bin/dpkg returned an error code (1) root@me-desktop:~#

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• Agressive Auto-Updating?

  - by MattiasK

  What do you guys think is best practice regarding auto-updating? Google Chrome for instance seems to auto-update itself as soon as it get's a chance without asking and I'm fine with it. I think most "normal" users benefits from updates being a transparent process. Then again, some more technical users might be miffed if you update their app without permission, as I see it there's 3 options: 1) Have a checkbox when installing that says "allow automatic updates" 2) Just have a preference somewhere that allows you to "disable automatic updates" so that you have to "check for updates manually" I'm leaning towards 2) because 1) feels like it might alienate non-technical users and I'd rather avoid installation queries if possible. Also I'm thinking about making it easy to downgrade if an upgrade (heaven forbid) causes trouble, what are your thoughts? Another question, even if auto-updates are automatically, perhaps they should be announced. If there's new features for example otherwise you might not realize and use them One thing that kinda scares me though is the security implications, someone could theorically hack my server and push out spyware/zombieware to all my customers. It seems that using digital signatures to prevent man-in-the-middle attacks is the least you could do otherwise you might be hooked up to a network that spoofs the address of of update server.

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• Securing a Cloud-Based Data Center

  - by Orgad Kimchi

  No doubt, with all the media reports about stolen databases and private information, a major concern when committing to a public or private cloud must be preventing unauthorized access of data and applications. In this article, we discuss the security features of Oracle Solaris 11 that provide a bullet-proof cloud environment. As an example, we show how the Oracle Solaris Remote Lab implementation utilizes these features to provide a high level of security for its users. Note: This is the second article in a series on cloud building with Oracle Solaris 11. See Part 1 here.  When we build a cloud, the following aspects related to the security of the data and applications in the cloud become a concern: • Sensitive data must be protected from unauthorized access while residing on storage devices, during transmission between servers and clients, and when it is used by applications. • When a project is completed, all copies of sensitive data must be securely deleted and the original data must be kept permanently secure. • Communications between users and the cloud must be protected to prevent exposure of sensitive information from “man in a middle attacks.” • Limiting the operating system’s exposure protects against malicious attacks and penetration by unauthorized users or automated “bots” and “rootkits” designed to gain privileged access. • Strong authentication and authorization procedures further protect the operating system from tampering. • Denial of Service attacks, whether they are started intentionally by hackers or accidentally by other cloud users, must be quickly detected and deflected, and the service must be restored. In addition to the security features in the operating system, deep auditing provides a trail of actions that can identify violations,issues, and attempts to penetrate the security of the operating system. Combined, these threats and risks reinforce the need for enterprise-grade security solutions that are specifically designed to protect cloud environments. With Oracle Solaris 11, the security of any cloud is ensured. This article explains how.

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