apt-get error “E: Unable to correct problems, you have held broken packages.”

The problem you have encountered is basically the package, or dependencies that are conflicting or broken and are therefore “held”.

You can check what (if any) packages are held using the following command:

dpkg –get-selections | grep hold

or

apt-mark showhold

If there’s no packages, or no output. That means it’s probably a dependency […]

Testing Failed: “Failed: error: SBT did not send a reply to our request, perhaps it was killed or failed to start”

Activator error “Failed: error: SBT did not send a reply to our request, perhaps it was killed or failed to start”.

This may be because SBT isn’t installed, SBT is a “simple build tool” for scala which isn’t packaged with the main binaries. You can download and install the latest SBT from the official […]

Linux Mint: “Could not download all repository indexes”

When running

sudo apt-get update

or attempting to update via the Update Manager in Linux Mint (13), I was fronted with the following error:

Failed to fetch http://packages.linuxmint.com/dists/deb … tion-en_US Unable to connect to packages.linuxmint.com:http: Failed to fetch http://packages.linuxmint.com/dists/deb … slation-en Unable to connect to packages.linuxmint.com:http: Failed to fetch http://packages.linuxmint.com/dists/deb … tion-en_US […]

VirtualBox (4.26) USB Issue: “unable to enumerate USB device on port n”

After a couple of hours trying to get a USB device (USB-to-Serial FTDI) working in VirtualBox with OSX host and Ubuntu 12.10 guest and receiving an error message similar to the follow:

usb 6-3: new full speed USB device number 24 using ohci_hcd usb 6-3: device not accepting address 24, error -110 hub 6-0:1.0: […]

what(): Serial Port failed to open: open: Permission denied

what(): Serial Port failed to open: open: Permission denied

Trying to get access to your serial port without the need for running whatever program as sudo or root? You’re probably not in the dialout group, if that’s the case, here’s the fix:

First, check you aren’t in the group:

groups alex

This will list […]

Team Fortress 2 Segmentation Fault – Steam for Linux

After getting invited to join the Steam Beta for Linux, (after weeks of using the bypass) I decided to get playing some TF2. After the long install and download I booted it up. The Value splash screen with the tap-guy loads and the menu begins to load, but once it has finished, the game […]

fatal error: curl/curl.h: No such file or directory | Ubuntu 12.04

fatal error: curl/curl.h: No such file or directory

If you’re missing the curl/curl.h header file, chances are you’re just missing the correct dev package file for the curl library.

sudo apt-get install libcurl4-gnutls-dev

That should fix it.

Ubuntu 12.04 – Removing conflicting operating system files…

If you’re trying out the latest version of Ubuntu, 12.04 or Precise Pangolin and you want to keep your old /home partition, chances are you’ve come across the installation hanging on a process “Removing conflicting operating system files…”. No worries, this seems to be a common bug and there’s a pretty easy work around.

[…]

AL lib: pulseaudio.c:331: PulseAudio returned minreq > tlength/2; expect break up – Ubuntu 11.10

./blender connect failed: No such file or directory ndof: spacenavd not found AL lib: pulseaudio.c:331: PulseAudio returned minreq > tlength/2; expect break up Floating point exception

Download and install the associated package to your processor from here : https://launchpad.net/ubuntu/oneiric/+package/python-openal

Restart your computer and the issue should now be resolved.

OpenNI – error CS0006: cannot find metadata file `System.Windows.Forms.dll’

During installing the OpenNi kinect drivers, found here: https://github.com/OpenNI/OpenNI, I came across this error:

make[1]: Entering directory `/home/alex/kinect/OpenNI/Platform/Linux-x86/Build/Samples/SimpleViewer.net’ gmcs -out:../../../Bin/Release/SimpleViewer.net.exe -target:winexe -unsafe -o+ -r:OpenNI.net.dll -r:System.Windows.Forms.dll -r:System.Drawing.dll -lib:../../../Bin/Release ../../../../../Samples/SimpleViewer.net/*.cs ../../Res/AssemblyInfo-OpenNI.cs error CS0006: cannot find metadata file `System.Windows.Forms.dll’ Compilation failed: 1 error(s), 0 warnings make[1]: *** [../../../Bin/Release/SimpleViewer.net.exe] Error 1 make[1]: Leaving directory `/home/alex/kinect/OpenNI/Platform/Linux-x86/Build/Samples/SimpleViewer.net’ make: *** [Samples/SimpleViewer.net] […]