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Help! Online upgrade from 12.04 to 14.04 stuck

- by Luis

I was trying to upgrade my Lenovo T500 laptop from Kubuntu 12.04 LTS to Kubuntu 14.04 LTS. Fired up the upgrade process, and finally after downloading a zillion packages the upgrade got going, only to get stuck... It has been stuck for hours on: Installing the upgrades->Unpacking subversion Last lines of error messages: GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.32.4/./gobject/gtype.c:2722: You forgot to call g_type_init() at /usr/lib/perl/5.18/DynaLoader.pm line 207. GLib-CRITICAL **: g_once_init_leave: assertion `result != 0' failed at /usr/lib/perl/5.18/DynaLoader.pm line 207. I don't care much about subversion anymore, I use git now; I don't care if subversion ends up in a bad state and I have to remove it... I just want the upgrade to continue, and hopefully complete. Any ideas???? Thanks, Luis

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Is it safe to install Compiz Experimental Plugins 0.1.1 on Maverick?

- by litvin05

Does anyone have these plugins installed? Sorry, but I'm worried, because my past attempts to update compiz have failed, and when I try to install these plugins they ask to me to update these files: compiz-dev compiz-fusion-bcop debhelper html2text intltool-debian libcairo-gobject2 libcairo2-dev libdecoration0-dev libdrm-dev libexpat1-dev libfontconfig1-dev libfreetype6-dev libgl1-mesa-dev libglu1-mesa-dev libice-dev libkms1 libmail-sendmail-perl libpango1.0-dev libpixman-1-dev libpng12-dev libsm-dev libstartup-notification0-dev libsys-hostname-long-perl libx11-xcb-dev libxcb-render0-dev libxcb-shm0-dev libxcomposite-dev libxcursor-dev libxdamage-dev libxext-dev libxfixes-dev libxft-dev libxinerama-dev libxml2-dev libxrandr-dev libxrender-dev libxslt1-dev libxss-dev mesa-common-dev po-debconf x11proto-composite-dev x11proto-damage-dev x11proto-fixes-dev x11proto-randr-dev x11proto-render-dev x11proto-scrnsaver-dev x11proto-xext-dev x11proto-xinerama-dev Please answer my question, and I'll be very grateful! These Plugins are here

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Access forbidden 403 error in xampp

- by Ramvignesh

I am very new to xampp. I have made a fresh xampp install with the following commands. sudo su cd /tmp wget bit.ly/1cmyrUo -O xampp-32bit.run chmod 777 ./xampp-32bit.run sudo ./xampp-32bit.run Then I made a perl file to check whether my xampp works. The following is my sample.pl file content. #!usr/bin/perl print "content-type:text/html\n"; print(header()); use CGI qw(:standard); print(start_html()); print "Hello. I am ram"; print(end_html()); After copying my perl file from /home/vicky/desktop to /opt/lampp/cgi-bin. I started my xampp with the following command. /opt/lampp/lampp start Then I ran my sample.pl in the localhost with the help of the http://localhost/cgi-bin/sample.pl in my mozilla browser. I just got the following window. I found only answers relating to the 'new security concept error' and 'accessing virtual host issue'. I did came across an askubuntu query, a bid similar to that of mine. It had no answers but some comments. One comment suggested to change the file permissions. It directed to get help from here. It said to change the directory permission as 755 and file permission as 644 to resolve this kind of issue. When I tried to do that, I came to know that my cgi-bin directory already had 755 permission and my sample.pl had 644 permission. I have no solutions now. PostScript: I have attached the content of my /opt/lampp/apache2/conf/httpd.conf file. Hope this will help the answer-providers to understand my problem completely. Alias /bitnami/ "/opt/lampp/apache2/htdocs/" Alias /bitnami "/opt/lampp/apache2/htdocs" <Directory "/opt/lampp/apache2/htdocs"> Options Indexes FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory>

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C library build system dependencies

- by Ninefingers

Hello all, This debate has cropped up on a mailing list for a project I'm involved in. Unfortunately we're quite a small bunch at the moment, so I want to ask a wider audience. We're writing a C library (for arbitrary precision arithmetic) and are investigating build systems. Currently we have a bash script in desperate need of work. I believe we can't use autotools etc due to licensing (bsd vs gpl). So I suggested we use a modern scripting language like python or perl. The question is: is having something like perl or python around at build time an unrealistic dependency on Unix-like platforms these days?

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Error message during update from 13.04 to 13.10

- by layonhands

The following was reported after I attempted to report the problem back to Ubuntu: The problem cannot be reported: You have some obsolete package versions installed. Please upgrade the following packages and check if the problem still occurs: ubuntu-release-upgrader-gtk, apport, apport-gtk, apport-symptoms, apt, apt-utils, at-spi2-core, binutils, dbus, gcc-4.7-base, gdb, gir1.2-atk-1.0, gir1.2-gtk-3.0, glib-networking, glib-networking-common, glib-networking-services, gnupg, gpgv, ifupdown, initramfs-tools, initramfs-tools-bin, kmod, libappindicator3-1, libapt-inst1.5, libapt-pkg4.12, libasound2, libatk-bridge2.0-0, libatk1.0-0, libatk1.0-data, libatspi2.0-0, libc-bin, libc6, libcups2, libdbus-1-3, libdbusmenu-glib4, libdbusmenu-gtk3-4, libdrm-intel1, libdrm-nouveau2, libdrm-radeon1, libdrm2, libgail-3-0, libgcc1, libgcrypt11, libglib2.0-0, libglib2.0-data, libgnutls26, libgomp1, libgstreamer-plugins-base1.0-0, libgstreamer1.0-0, libgtk-3-0, libgtk-3-bin, libgtk-3-common, libgudev-1.0-0, libicu48, libindicator3-7, libkmod2, liblcms2-2, libpci3, libplymouth2, libpolkit-agent-1-0, libpolkit-backend-1-0, libpolkit-gobject-1-0, libprocps0, libpython-stdlib, libpython2.7, libpython2.7-minimal, libpython2.7-stdlib, libpython3-stdlib, libpython3.3-minimal, libpython3.3-stdlib, libssl1.0.0, libstdc++6, libtiff5, libudev1, libx11-6, libx11-data, libx11-xcb1, libxcb-dri2-0, libxcb-glx0, libxcb-render0, libxcb-shm0, libxcb1, libxcursor1, libxext6, libxfixes3, libxi6, libxinerama1, libxml2, libxrandr2, libxrender1, libxres1, libxt6, libxtst6, libxxf86vm1, lsb-base, lsb-release, module-init-tools, multiarch-support, openssl, passwd, pciutils, perl, perl-base, perl-modules, plymouth, plymouth-theme-ubuntu-text, policykit-1, procps, python, python-gi, python-minimal, python2.7, python2.7-minimal, python3, python3-apport, python3-distupgrade, python3-gi, python3-minimal, python3-problem-report, python3-software-properties, python3-update-manager, python3.3, python3.3-minimal, rsyslog, shared-mime-info, software-properties-common, software-properties-gtk, tar, tzdata, ubuntu-release-upgrader-core, ubuntu-release-upgrader-gtk, udev, update-manager, update-manager-core, update-notifier, update-notifier-common If this question has already been answered, I'm sorry for the repost, but I would appreciate a link to the fix. Thanks. FYI: Dell Latitude D630, Intel Centrino processor. Also, the updater is currently running what seems to be the update. I will report back when it is done going through its process to let you know if it is in fact the 13.10 update. Update 2: System went through an update, but it wasn't for the OS. I think it was an update for the error message mentioned above. Now the OS update is currently running the 'distribution upgrade' portion of the update. This is further than it had gone before. Again I will report back once this is done to let you know whether or not the update was successful. Final Update: Don't know for sure what happened, but I'm almost sure that the error mentioned above was resolved in the first update prior to the 13.10 update. All set.

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What language yields most rapid development of a SOAP client application

- by mathematician1975

I have written a SOAP client application. It started off as Perl but I needed it to have proper multithreaded capabilities, so I rewrote it in C++ which was a horrendous experience and the development time was many many times more than that of the Perl bot. I need to implement a new SOAP client and I was wondering what peoples opinions were about choice of language with regards to fastest development time. C++ is clearly not well suited to web services type programming so there is no way I am going to write in C++ again.

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Transferring local site to shared hosting

- by Pete

I'm looking to setup a simple online text processing tool similar to the Clang demo. The processing program itself is a C++ program which I can modify to provide the desired output I need. Since I use Linux+Perl daily and have used Apache in the past, I'd like to get this working locally first. My two questions are: Is it possible to do this with only Apache and Perl? I've looked into frameworks for doing this and quickly ran into The Paradox Of Choice. Will I be able to easily transfer a working local site to a shared hosting service? I want to administer as little as possible. My understanding is since this needs to run a C++ program that CGI is a requirement and thus I need to administer the httpd server. Hopefully this doesn't mean a VPS. Thanks

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Run Java application as a different user [on hold]

- by Harihar Das

I need to run a few perl scripts from a Java GUI application. I am using Runtime API to do that. However, few of the perl scripts need to run under a specific user account to have special credentials to access specialized resources (e.g. Database, Files). I have heard of alleviating user access using UAC. But till now I am not able to find the solution. Please help me on how to run a process under a different user login. Is there anything similar to c# impersonization in Java?

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Why does everyone dislike PHP? [closed]

- by SomeKittens

I'm primarily a Java/Python programmer, but I just picked up an entry-level job doing web development. I had to learn PHP, and several of my CS friends told me that it would stunt my coding ability/be terrible to program in/murder me in the middle of the night. So far, there have been annoying moments with the language (one particular thing that bugs me is the syntax for calling functions...), but nothing living up to the statements of my friends. I still haven't learned very much about the language. Is their hate justified? Why or why not? A few quotes I've seen about PHP: Haskell is faster than C++, more concise than Perl, more regular than Python, more flexible than Ruby, more typeful than C#, more robust than Java, and has absolutely nothing in common with PHP. Audrey Tang "PHP is a minor evil perpetrated and created by incompetent amateurs, whereas Perl is a great and insidious evil, perpetrated by skilled but perverted professionals." Jon Ribbens. Programmer.

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Is there a debian/ubuntu policy on softlinking things to another location in opt once they're installed?

- by AbrahamVanHelpsing

Is there a debian/ubuntu policy on softlinking things to another location in opt once they're installed properly in usr/share or usr/lib? Here's a simple example: Packaging up dnsenum. It's a REALLY simple package (4 files). A perl script, two wordlists, and a readme. So from what I gather: The wordlists should go in usr/share/dnsenum/* The perl script itself would go in usr/lib/dnsenum/ The readme would go in usr/share/doc/dnsenum/ Add a wrapper bash script that goes in bin and just passes arguments to dnsenum.pl. The question is this: If there are various tools that provide wordlists or some other shared resource, is there a policy on linking all the wordlists from different packages in to /opt/wordlists/ ? It seems like the "right" thing to do respecting the directory structure while still making things convenient.

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How to prevent script not to stop after apt-get?

- by Eonil

I keep some bash snippets and copy&paste them when I needed for management. But I discovered apt-get cancels script execution. Here's my script where problematic. apt-get -y install gcc g++ make cmake perl cd ~/ mkdir t1 cd t1 I copy & paste this script on OS X Terminal to Ubuntu 12.04 LTS server (fresh install on VM) Script always stop after apt-get finished. I run this command with root account like this. ssh user1@server <password…> sudo su <password…> apt-get -y install gcc g++ make cmake perl cd ~/ mkdir t1 cd t1 Can this be a problem? Or why my script stops after apt-get finished, and how to make it to continue?

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Algorithm for Learning development

- by user9057

Hi all, This is a fairly general question. I know a bit of Perl and Python and I am looking to learn programming in more depth so that once I get the hang of it I can start developing applications and then websites. I would like to know of an algorithm (sequence of steps :)) that could describe my approach towards learning programming in general. I have posted small questions on Perl/Python and I have recieved great help from everyone. Note:- I am not in a hurry to learn. I know it takes time and that's fine. Please give any suggestions you think are valid. Also, please don't push me to learn Lisp, Haskell etc - I am a beginner.

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Algorithm for Learning development

- by user9057

This is a fairly general question. I know a bit of Perl and Python and I am looking to learn programming in more depth so that once I get the hang of it I can start developing applications and then websites. I would like to know of an algorithm (sequence of steps :)) that could describe my approach towards learning programming in general. I have posted small questions on Perl/Python and I have recieved great help from everyone. Note:- I am not in a hurry to learn. I know it takes time and that's fine. Please give any suggestions you think are valid. Also, please don't push me to learn Lisp, Haskell etc - I am a beginner.

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How to install texlive2011?

- by vrx

I just moved from Windows to Ubuntu. Software Center in Ubuntu does have texlive2009 package. There is no straightforward installation process from TUG, or from Google search result. I found some installation of Texlive2010 but it does not work. Here are the step: download an texlive2011.iso, 2.3GB and save in local drive mount to a virtual drive install perl tk (ok) "sudo ./install-tl" does not work, "perl ./install-tl" shows pre-installation setting but it does not have the write access to /usr/local/textlive/2011/ Finally, I'm stuck Please guide me with a step by step tutorial or suggest any other solution beside typing in the black screen without knowing what is going on behind the Terminal.

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Fix stubborn 'Setting locale failed.'

- by plua

I have a very stubborn, well-known locale error on Ubuntu 9.10: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_TIME = "custom.UTF-8", LANG = "en_US.UTF-8" Tried the following: Added LANG=en_US.UTF-8 and LC_ALL=en_US.UTF-8 to /etc/environment Run apt-get install --reinstall locales (error: perl: warning: Falling back to the standard locale ("C"). /usr/bin/mandb: can't set the locale; make sure $LC_* and $LANG are correct) Run sudo dpkg-reconfigure locales. Result: Cannot set LC_ALL to default locale: No such file or directory, and then updates locales all locales including en_US.UTF-8 sudo locale-gen updates all locales successfully, including en_US.UTF-8 sudo locale-gen un_US en_US.UTF-8 gives no error nor other output In /etc/default/locale it says LANG="en_US.UTF-8" echo $LANG gives en_US.UTF-8 /var/lib/locales/supported.d/local says en_US.UTF-8 UTF-8 locale -a gives me: C en_AG en_AU.utf8 en_BW.utf8 en_CA.utf8 en_DK.utf8 en_GB.utf8 en_HK.utf8 en_IE.utf8 en_IN en_NG en_NZ.utf8 en_PH.utf8 en_SG.utf8 en_US.utf8 en_ZA.utf8 en_ZW.utf8 POSIX So well... I am pretty much out of options I can think of. Anybody any idea?? Thanks!

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Windows 7 scheduled task returns 0x2

- by demmith

I have identical scheduled tasks running in Windows XP Pro and Windows 7. The XP Pro one runs fine, the Windows 7 one always returns 0x2 (which means, "The system cannot find the file specified"; however, executing from the command line is no problem) in the Last Run Result column of the Task Scheduler UI. The scheduled task executes a .bat file daily. The .bat file contains a call to execute a Perl script. As I stated in the previous paragraph, it executes under XP without any trouble but under Windows 7, no dice. The task under Windows 7 is set to "run whether the user is logged on or not." In this case it is me, I am the only user of the system. It is also set to "Run with highest privileges." And it is not hidden. The .bat file executes perfectly well from the command line - it calls the Perl script as expected and the Perl script does its thing. I have searched far and wide looking for an appropriate answer to this issue. So far I have found nothing. What the devil is going on with this Win7 scheduled task? I am ready to pull my hair out.

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Ubuntu cannot resolve unmet dependency

- by DisgruntledGoat

I'm trying to install a package on my Ubuntu 8.10 server. However, I get this message: The following packages have unmet dependencies. webmin: Depends: apt-show-versions but it is not going to be installed E: Unmet dependencies. Try ‘apt-get -f install’ with no packages (or specify a solution). So I run apt-get -f install which offers to install apt-show-versions and libapt-pkg-perl. After selecting to install without verification, I get these errors: Err http://gb.archive.ubuntu.com intrepid/universe libapt-pkg-perl 0.1.22build1 404 Not Found Err http://gb.archive.ubuntu.com intrepid/universe apt-show-versions 0.13 404 Not Found Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/liba/libapt-pkg-perl/libapt-pkg-perl_0.1.22build1_i386.deb 404 Not Found Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/a/apt-show-versions/apt-show-versions_0.13_all.deb 404 Not Found E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? I've tried running apt-get update and adding --fix-missing as suggested, but neither works. Where do I go from here?

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Ubuntu cannot resolve unmet dependency

- by DisgruntledGoat

I'm trying to install a package on my Ubuntu 8.10 server. However, I get this message: The following packages have unmet dependencies. webmin: Depends: apt-show-versions but it is not going to be installed E: Unmet dependencies. Try ‘apt-get -f install’ with no packages (or specify a solution). So I run apt-get -f install which offers to install apt-show-versions and libapt-pkg-perl. After selecting to install without verification, I get these errors: Err http://gb.archive.ubuntu.com intrepid/universe libapt-pkg-perl 0.1.22build1 404 Not Found Err http://gb.archive.ubuntu.com intrepid/universe apt-show-versions 0.13 404 Not Found Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/liba/libapt-pkg-perl/libapt-pkg-perl_0.1.22build1_i386.deb 404 Not Found Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/a/apt-show-versions/apt-show-versions_0.13_all.deb 404 Not Found E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? I've tried running apt-get update and adding --fix-missing as suggested, but neither works. Where do I go from here?

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Windows 7 scheduled task returns 0x2

- by demmith

I have identical scheduled tasks running in Windows XP Pro and Windows 7. The XP Pro one runs fine, the Windows 7 one always returns 0x2 (which means, "The system cannot find the file specified"; however, executing from the command line is no problem) in the Last Run Result column of the Task Scheduler UI. The scheduled task executes a .bat file daily. The .bat file contains a call to execute a Perl script. As I stated in the previous paragraph, it executes under XP without any trouble but under Windows 7, no dice. The task under Windows 7 is set to "run whether the user is logged on or not." In this case it is me, I am the only user of the system. It is also set to "Run with highest privileges." And it is not hidden. The .bat file executes perfectly well from the command line - it calls the Perl script as expected and the Perl script does its thing. I have searched far and wide looking for an appropriate answer to this issue. So far I have found nothing. What the devil is going on with this Win7 scheduled task? I am ready to pull my hair out.

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yum trying to install el5 when I am on el6

- by giorgio79

When I run the following yum command I get this error: Package: git-1.7.10.1-1.el5.rf.x86_64 (rpmforge) Requires: libcurl.so.3()(64bit)" I read that this error is due to running an el5 rpmforge or having some el5 installed packages. How can I solve this problem? $ yum install git Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos.kiewel-online.ch * epel: fedora.kiewel-online.ch * extras: centos.kiewel-online.ch * rpmforge: mirror.de.leaseweb.net * updates: centos.kiewel-online.ch Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package git.x86_64 0:1.7.10.1-1.el5.rf will be installed --> Processing Dependency: perl-Git = 1.7.10.1-1.el5.rf for package: git-1.7.10.1-1.el5.rf.x86_64 --> Processing Dependency: perl(Git) for package: git-1.7.10.1-1.el5.rf.x86_64 --> Processing Dependency: libexpat.so.0()(64bit) for package: git-1.7.10.1-1.el5.rf.x86_64 --> Processing Dependency: libcurl.so.3()(64bit) for package: git-1.7.10.1-1.el5.rf.x86_64 --> Running transaction check ---> Package compat-expat1.x86_64 0:1.95.8-8.el6 will be installed ---> Package git.x86_64 0:1.7.10.1-1.el5.rf will be installed --> Processing Dependency: libcurl.so.3()(64bit) for package: git-1.7.10.1-1.el5.rf.x86_64 ---> Package perl-Git.x86_64 0:1.7.10.1-1.el5.rf will be installed --> Finished Dependency Resolution Error: Package: git-1.7.10.1-1.el5.rf.x86_64 (rpmforge) Requires: libcurl.so.3()(64bit) You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest

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Fix stubborn 'Setting locale failed.'

- by user60129

I have a very stubborn, well-known locale error on Ubuntu 9.10: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_TIME = "custom.UTF-8", LANG = "en_US.UTF-8" Tried the following: Added LANG=en_US.UTF-8 and LC_ALL=en_US.UTF-8 to /etc/environment Run apt-get install --reinstall locales (error: perl: warning: Falling back to the standard locale ("C"). /usr/bin/mandb: can't set the locale; make sure $LC_* and $LANG are correct) Run sudo dpkg-reconfigure locales. Result: Cannot set LC_ALL to default locale: No such file or directory, and then updates locales all locales including en_US.UTF-8 sudo locale-gen updates all locales successfully, including en_US.UTF-8 sudo locale-gen un_US en_US.UTF-8 gives no error nor other output In /etc/default/locale it says LANG="en_US.UTF-8" echo $LANG gives en_US.UTF-8 /var/lib/locales/supported.d/local says en_US.UTF-8 UTF-8 locale -a gives me: C en_AG en_AU.utf8 en_BW.utf8 en_CA.utf8 en_DK.utf8 en_GB.utf8 en_HK.utf8 en_IE.utf8 en_IN en_NG en_NZ.utf8 en_PH.utf8 en_SG.utf8 en_US.utf8 en_ZA.utf8 en_ZW.utf8 POSIX So well... I am pretty much out of options I can think of. Anybody any idea?? Thanks!

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List of freely available programming books

- by Karan Bhangui

I'm trying to amass a list of programming books with opensource licenses, like Creative Commons, GPL, etc. The books can be about a particular programming language or about computers in general. Hoping you guys could help: Languages BASH Advanced Bash-Scripting Guide (An in-depth exploration of the art of shell scripting) C The C book C++ Thinking in C++ C++ Annotations How to Think Like a Computer Scientist C# .NET Book Zero: What the C or C++ Programmer Needs to Know About C# and the .NET Framework Illustrated C# 2008 (Dead Link) Data Structures and Algorithms with Object-Oriented Design Patterns in C# Threading in C# Common Lisp Practical Common Lisp On Lisp Java Thinking in Java How to Think Like a Computer Scientist Java Thin-Client Programming JavaScript Eloquent JavaScript Haskell Real world Haskell Learn You a Haskell for Great Good! Objective-C The Objective-C Programming Language Perl Extreme Perl (license not specified - home page is saying "freely available") The Mason Book (Open Publication License) Practical mod_perl (CreativeCommons Attribution Share-Alike License) Higher-Order Perl Learning Perl the Hard Way PHP Practical PHP Programming Zend Framework: Survive the Deep End PowerShell Mastering PowerShell Prolog Building Expert Systems in Prolog Adventure in Prolog Prolog Programming A First Course Logic, Programming and Prolog (2ed) Introduction to Prolog for Mathematicians Learn Prolog Now! Natural Language Processing Techniques in Prolog Python Dive Into Python Dive Into Python 3 How to Think Like a Computer Scientist A Byte of Python Python for Fun Invent Your Own Computer Games With Python Ruby Why's (Poignant) Guide to Ruby Programming Ruby - The Pragmatic Programmer's Guide Mr. Neighborly's Humble Little Ruby Book SQL Practical PostgreSQL x86 assembly Paul Carter's tutorial Lua Programming In Lua (for v5 but still largely relevant) Algorithms and Data Structures Algorithms Data Structures and Algorithms with Object-Oriented Design Patterns in Java Planning Algorithms Frameworks/Projects The Django Book The Pylons Book Introduction to Design Patterns in C++ with Qt 4 (Open Publication License) Version control The SVN Book Mercurial: The Definitive Guide Pro Git UNIX / Linux The Art of Unix Programming Linux Device Drivers, Third Edition Others Structure and Interpretation of Computer Programs The Little Book of Semaphores Mathematical Logic - an Introduction An Introduction to the Theory of Computation Developers Developers Developers Developers Linkers and loaders Beej's Guide to Network Programming Maven: The Definitive Guide I will expand on this list as I get comments or when I think of more :D Related: Programming texts and reference material for my Kindle What are some good free programming books? Can anyone recommend a free software engineering book? Edit: Oh I didn't notice the community wiki feature. Feel free to edit your suggestions right in!

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Portable shebang line

- by Mike

#!/usr/bin/perl This is the shebang line to a lot of scripts I'm writing lately. Hard coding the path of the binary seems like it could create some problems. For instance, if one of my users has Perl installed at /something_else/bin then they'd have to change all the shebangs. I've seen some tools that will automatically replace the shebangs, but I'm wondering if there is something simpler.

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PerlIO in Windows PowerShell and CMD.exe

- by Evan Carroll

Apparently, a Perl script I have results in two different output files depending on if I run it under Windows PowerShell, or cmd.exe. The script can be found at the bottom of this question. The file handle is opened with IO::File, I believe that PerlIO is doing some screwy stuff. It seems as if under cmd.exe the encoding chosen is much more compact encoding (4.09 KB), as compared to PowerShell which generates a file nearly twice the size (8.19 KB). This script takes a shell script and generates a Windows batch file. It seems like the one generated under cmd.exe is just regular ASCII (1 byte character), while the other one appears to be UTF-16 (first two bytes FF FE) Can someone verify and explain why PerlIO works differently under Windows Powershell than cmd.exe? Also, how do I explicitly get an ASCII-magic PerlIO filehandle using IO::File? Currently, only the file generated with cmd.exe is executable. The UTF-16 .bat (I think that's the encoding) is not executable by either PowerShell or cmd.exe. BTW, we're using Perl 5.12.1 for MSWin32 #!/usr/bin/env perl use strict; use warnings; use File::Spec; use IO::File; use IO::Dir; use feature ':5.10'; my $bash_ftp_script = File::Spec->catfile( 'bin', 'dm-ftp-push' ); my $fh = IO::File->new( $bash_ftp_script, 'r' ) or die $!; my @lines = grep $_ !~ /^#.*/, <$fh>; my $file = join '', @lines; $file =~ s/ \\\n/ /gm; $file =~ tr/'\t/"/d; $file =~ s/ +/ /g; $file =~ s/\b"|"\b/"/g; my @singleLnFile = grep /ncftp|echo/, split $/, $file; s/\$PWD\///g for @singleLnFile; my $dh = IO::Dir->new( '.' ); my @files = grep /\.pl$/, $dh->read; say 'echo off'; say "perl $_" for @files; say for @singleLnFile; 1;

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Extracting columns from text file using PowerShell

- by atricapilla

Hi, I have to extract columns from a text file explained in this post: http://stackoverflow.com/questions/2499746/extracting-columns-from-text-file-using-perl-similar-to-unix-cut but I have to do this also in a Windows Server 2008 which does not have Perl installed. How could I do this using PowerShell? Any ideas or resources? I'm PowerShell noob...

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