Skip to main content

Posts

Showing posts from 2014

PyCharm: Unresolved reference 'print'

PyCharm can sometimes get confused specially if you have multiple interpreters and using virtualenv. To fix "Unresolved reference 'print'" message, do File | Setting... (Ctrl+Alt+S) | Project Interpreter | Show All (drop down) | Show path for the selected interpreter ( ) | Reload List of Paths ( ). Reference(s): http://forum.jetbrains.com/thread/PyCharm-291

Installing Pyro 4.30 in IronPython 2.7.4

This assumes that IronPython is installed in D:\ipy . Download Serpent archive file - used 1.7 ( link ). Serpent is needed by Pyro 4. Extract to a folder, say D:\Serpent . Change directory to where Serpent was extracted then do  D:\Serpent>D:\ipy\ipy.exe setup.py install . This will install Serpent. Download Pyro 4 tar archive ( link ). Extra to a folder, say D:\Pyro4 . Change directory to where Pyro4 was extracted then do D:\Pyro4>D:\ipy\ipy.exe setup.py install .

Change network category in Windows 8.1

Windows 8.x network category or network profile affects how other Windows machines detects or discover the node. A machine on  a domain or private network will most of the time allow file sharing and printing, more relaxed firewall, etc. For computers with multiple network interfaces changing network profile can be difficult using the GUI. To force a network interface to be in private profile for example you can do: PS c:\> Set-NetConnectionProfile -InterfaceAlias "VirtualBox Host-Only Network" -NetworkCategory Private where: "Virtual Host-Only Network" - is the name associated with the network interface "Private" - is the profile Reference(s): http://www.tinkertry.com/how-to-change-windows-8-1-network-type-from-public-to-private/

Going fallback mode in Ubuntu 13.04 due to performance issues with Unity

I configured Virtualbox guest machine to run Ubuntu 13.04 (Raring Ringtail) but performance is just not acceptable. It probably has to do with my host machine not having a good enough graphics hardware. Anyway, to make it bearable, I have gone Gnome Fallback mode. Anyway, below is my clean configuration from scratch to have a better performance running under VirtualBox. Initial clean-up and pre-requisites, open terminal ( Ctrl+Alt+T ): $: sudo apt-get update $: sudo apt-get upgrade $: sudo apt-get install gnome-session-fallback Log out from session $: gnome-session-quit From the GDM, select Gnome Fallback(No effects), see below for screen capture. Log back in to Ubuntu. To make it even better, install VirtualBox guest additions. But first let us install the pre-requisites and some clean-up. $: apt-get purge xserver-xorg-video-vmware libxatracker1 $: apt-get install dkms build-essential From VirtualBox Guest main UI, select Devices | Install Guest Additions... .H

"console: Failed to install '': java.nio.charset.UnsupportedCharsetException: cp0" message when opening a PyDev console

When opening a PyDev console using Jython 2.7b3, I am getting the following error message. console: Failed to install '': java.nio.charset.UnsupportedCharsetException: cp0 This does not show up in Jython 2.5. Note that this was already reported elsewhere, like: http://sourceforge.net/p/jython/mailman/message/32935457/ http://bugs.jython.org/issue2222%3E To workaround this issue, add  -Dpython.console.encoding=UTF-8 in PyDev configuration, see below for details.

Creating a new SQL Server instance in SQL 2005 Express

This may apply to other SQL Server 2005 products but since I haven't not tried them myself, I can't definitely say that this is the case. Anyway, on default SQL Server 2005 Express install it will create one sql server instance named "SQLEXPRESS." For most occasions this should do just fine but in some cases a named/new instance is necessary to partition/compartmentalize the development of an application. Creating a new sql server instance is actually very easy. To create a new instance, do the following: a) Secure a copy of SQL 2005 Express installation media. b) Run setup.exe. c) Accept license agreement. After accepting the agreement, the installation program will perform various other checks like disk space available... etc. d) "Welcome to the Microsoft SQL Server Installation Wizard" just lazily hit on "Next" button. e) In System Configuration Check screen, if the reports are okay then proceed, hit on "Next" button again. f)

Send email via GMAIL using Python

Send email via GMAIL using Python. Note: Need to disable CAPTCHA and enable access for less secure apps https://www.google.com/settings/security https://accounts.google.com/DisplayUnlockCaptcha References: www.mkyong.com/python/how-do-send-email-in-python-via-smtplib/ http://joequery.me/guides/python-smtp-authenticationerror/

Updating packages on OpenSUSE via console

Zypper is the functionally equivalent to apt-get or aptitude for OpenSUSE. Man page should give you more information how to use it, you can also visit  http://en.opensuse.org/SDB:Zypper_usage_1  for additional information. For example, to update your current system with the latest packages open konsole and do: $: su #: zypper refresh #: zypper update To install plain old rpm do: $: su #: zypper install google-chrome-stable_current_i386.rpm This should install the downloaded stable version of Google Chrome. Of course you can substitute suitable rpm as necessary. To search for a package like libpng , do: $: zypper search libpng ~ts

The following add-ins could not be started MonoDevelop.GnomePlatform

Installing MonoDevelop in OpenSUSE 12.2 from its repository was very easy. When running it for the first time though I got the message: The following add-ins could not be started: The root of the trace shows MonoDevelop.GnomePlatform,2.8 A quick search shows that MonoDevelop depends on libgnomeui . This should have been part of dependencies when installing the application but well.... Below is the screen shot of the error message. References: http://software.1713.n2.nabble.com/MonoDevelop-and-openSUSE-12-1-td7462957.html [2013/04/09] - Same issue observed in OpenSUSE 12.3 and also the same fix. [2014/11/02] - Same issue observed in OpenSUSE 13.3, mondevelop 3.0.6 and the same fix.

Monodevelop does not start on Linux Mint 17

I have installed Monodevelop using Software Manager in Linux Mint 17. It seems like all went okay but nothing was working. It turns out that missing dependencies was the culprit. To fix it do the following: $: sudo apt-get install mono-complete $: sudo apt-get install gtk-sharp3 Reference(s): http://stackoverflow.com/questions/25791149/monodevelop-will-not-start-in-mint-17

HowTo: Fix "user is not in the sudoers file. This incident will be reported" in Debian

In Debian, the user created during installation is not automatically added to the sudoers list. To fix do: Change to root user by typing su in a terminal. As root, do visudo . Search for line root    ALL=(ALL:ALL) ALL . Copy that line (in nano, do Ctrl+K then Ctrl+U to uncut and on more Ctrl+U to duplicate the line). Change that new line to like timus    ALL=(ALL:ALL) ALL . This adds user timus to the sudoers. Reference(s): http://ubuntuforums.org/showthread.php?t=1837295

LXPanel no status bar in Debian Sid/Jessie

I just installed latest Debian Sid/Jessie (testing branch-10/25/2014) and selected LXDE as my desktop environment via network install. The problem was that no start menu or status bar was shown. Seems like a bug somewhere in LXDE but as a workaround do: $: cp -rp /etc/xdg/lxpanel/profile/LXDE/* ~/.config/lxpanel/LXDE/ Reference(s): https://bugs.launchpad.net/raspbian/+bug/1080966

Re-install grub in Debian 8 Jessie

So I was trying to install Debian Jessie beta 2 (Debian 8) and was not really paying attention what I was doing. It ended up that I don't grub installed.So who do you fix this? As usual in Linux/Debian there so many ways to do this but below are the steps that I have done: Boot the machine using the boot media, I was using debian-jessie-DI-b2-amd64-netinst.iso and yes I am using VirtualBox. Select Advanced options | Rescue mode. Follow text based wizard, change the values as you see fit. I did English for Select a language . Then United States for Select your location . American English for Configure the keyboard . Used debian in Configure the network - note that this does not have to match to the machine that you want to recover.  Left blank for the domain. Then for Configure the clock I selected Central . In Enter rescue mode , I have selected /dev/sda1 as I only have one SATA HD and I know that the first partition was my root. You probably to make guesses if you wan

PyCharm 3.4 Community Edition does not support Tfs Integration

PyCharm 3.4 Community is a very fine IDE and I cannot complain. But for some of the stuff that I do I need to use Tfs as source control. I spent quite a few hours searching the web how to enable Tfs integration in PyCharm but I can't find a good documentation that says you can't not use in PyCharm. But IntelliJ IDEA feature comparison matrix shows that Tfs Integration is only available in Ultimate.  So it must be the case that Tfs Integration is only available in Professional version or it just does not work.

Unable to mount VirtualBox shared drive using 4.3.10

When mounting a shared drive in VirtualBox 4.3.10, got he following error in Linux box: sudo mount -t vboxsf E_DRIVE vbox mount: wrong fs type, bad option, bad superblock on E_DRIVE,        missing codepage or helper program, or other error        (for several filesystems (e.g. nfs, cifs) you might        need a /sbin/mount.<type> helper program)        In some cases useful info is found in syslog - try        dmesg | tail  or so This is caused by wrong symbolic link, to fix it do: ~$ sudo ln -sf /usr/lib/i386-linux-gnu/VBoxGuestAdditions/mount.vboxsf /sbin/mount.vboxsf References: http://superuser.com/questions/736024/cannot-share-host-directory-with-virtualbox-guest-mint-16-64-bit

Read 64-bit registry key from 32-bit process in IronPython using WMI

References: http://msdn.microsoft.com/en-us/library/aa393297(v=vs.85).aspx http://www.experts-exchange.com/Programming/Languages/C_Sharp/Q_23080571.html Note(s): This is not reliable on Windows 10 or maybe related to the version of .Net? Anyway updated version is located here: http://8thstring.blogspot.com/2016/01/read-64-bit-remote-registry-from-32-bit.html

Manually configure a network interface to get an IP from a DHCP server

Got an Ubuntu 13.10 machine with one network interface. Added another one to test internal networking. To make this new network interface get IP address from DHCP server, we need to modify /etc/network/interfaces , like: auto eth1 iface eth1 inet dhcp Reference(s): https://help.ubuntu.com/10.04/serverguide/network-configuration.html Keywords: network interface IP Ubuntu

QNX Momentics throws a lot of error on start up after install in Ubuntu 13.10 64-bit

tldr; Reboot the machine. When starting up QNX Momentics 6.5.0 on Ubuntu 13.10 64-bit, it throws a lot of errors, like below. 'Initial state verification' has encountered a problem. An internal error has occured. [Details>>] [OK] There is an error in the QNX Configuration settings. Either the QNX_CONFIGURATION environment variable is not defined correctly or the location it points to is not accessible. Exit the IDE and fix the error? [No] [Yes] There is an error in the QNX compiler settings. Either the QNX compiler is not defined or compiler definition directory is not accessible. You should exit the IDE and fix the error immediately. Exit the IDE and fix the error? [No] [Yes] And what is the workaround? Reboot the machine. Guessing that the environment variables are not yet set after install, reboot picks up the new configuration. Keywords: QNX Momentics Ubuntu

Fixing QNX Momentics Gtk themes warning on Ubuntu 13.10 64-bit

You might observe the following Gtk warnings when running QNX Momentics 6.5.0 on Ubuntu 13.10 64-bit. (qde:9636): Gtk-WARNING **: Unable to locate theme engine in module_path: "murrine", (qde:7229): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", (qde:7229): Gtk-WARNING **: Unable to locate theme engine in module_path: "clearlooks", To fix, run the following command. $: sudo apt-get install gtk2-engines-murrine:i386 gtk2-engines-pixbuf:i386 gtk2-engines:i386