Posts Tagged ‘ubuntu’
This post is about how to change the resolution (i.e. font size) of virtual terminals or “tty” in Linux. Virtual terminal is the basic command line interface which you see when you press <Ctrl><Alt><F1> (note: to get back to your existing Gnome or KDE session press <Alt><F7>). This is different from the Terminal emulator, such [...]
Unfortunately the default memory settings for Eclipse are not sufficient to run BIRT properly on Ubuntu. Editing BIRT reports was fine on my machine, but the preview always crashed or froze Eclipse. When run from the command line, errors like these came up: Exception in thread “SocketListener0-0″ java.lang.OutOfMemoryError: PermGen space Exception in thread “SocketListener0-1″ java.lang.OutOfMemoryError: [...]
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To check for installed packages from the command line, use the dpkg command with the –get-selections option. This returns all packages installed on your system (most likely a lot!). So it is best to use grep to narrow down the search results. For example, the following command lists all packages with “fire” in the package [...]
One of the major new features in Ubuntu 9.04 (Jaunty) has of course been the new notification system. For what it’s worth, I think it’s a pretty good, bold piece of work and the notifications look pretty good. The trouble is, as with any new framework, that not all applications out there are using the [...]
My only issue after an otherwise smooth upgrade to Ubuntu 9.04 (Jaunty) has been with Tracker. After logging in I noticed high disk and CPU usage, and eventually an error came up regarding corrupted index. I have tried several times to re-index, this did not work; also pausing all indexing in the tracker applet has [...]
Here are a few things you can try if you get the BADSIG error in Update Manager: Run the following commands from terminal shell: sudo apt-get clean sudo apt-get update -o Acquire::http::No-Cache=True Change the Ubuntu server from which updates are downloaded: System > Software Sources > Ubuntu Software tab > change the selected server in [...]
nautilus-image-converter is a helpful package which adds two entries to the Nautilus context menu for resizing and rotating images. It works for selections of multiple images, too, and has options for creating copies or editing the images in place. To install from command line: sudo apt-get install nautilus-image-converter
Medical images, e.g. X-Rays, are commonly stored in the DICOM format. By default you won’t be able to open these in Ubuntu, but there is actually a package in the repositories which lets you convert DICOM image files to more common formats, e.g. JPEG, PNG or bitmap. sudo apt-get install dcmtk dcmj2pnm +oj img00000 img00000.jpg [...]
UPDATE: These steps work fine for Ubuntu 9.04 (Jaunty). For more recent Ubuntu versions you should take a look at this later post which has the correct steps. The Ctrl-Alt-Backspace key combination which restarts X is by default disabled in X version 1.6 (and hence in Ubuntu 9.04). Follow the steps below to re-enable it. [...]