Every once in a while I see users having issues to update due to errors like this:
E:Type 'ain' is not known on line 1 in source list /etc/apt/sources.list.d/some-ppa.list'
with varying types/line numbers/source list files (often after removing a PPA).
How can such an error be fixed?
My Logitech R400 presenter sends the following key codes:
keycode 112 (keysym 0xff55, Prior) [page up]
keycode 117 (keysym 0xff56, Next) [page down]
keycode 60 (keysym 0x2e, period)
keycode 71 (keysym 0xffc2, F5)
keycode 9 (keysym 0xff1b, Escape)
Basically, I want to use this presenter to remotely control Banshee, so I'd like to remap Prior to B, Next to N, and so on.
How can I change the keymap for this device only (as I certainly don't want to remap those key codes globally)?
Unity and Unity 2D look very much alike, so how can new users easily find out whether they are running Unity or Unity 2D?
I want user foo to auto-login using LightDM (which has been used by Ubuntu since version 11.10). How would I do that?
Dconf is pretty young, yet my database is already a mess with lots of "schema-less" keys. Is there a way to do some cleaning up, or would I need to start from scratch (by removing ~/.config/dconf/user I guess)?
Goal: I want to be able to securely use the internet via my home PC while my notebook is connected to an open hotspot/access point.
I do know that I can use a SSH tunnel/SOCKS proxy, but I don't want to fiddle around with applications (making them use it, if even possible). I guess what I need is an OpenVPN setup, so I'm looking for a detailed guide on how to:
Ubuntu versions this should work on are 10.10 and 11.04.
It looks like Ubuntu 11.04 will come with overlay scrollbars by default. I do like them, but I don't like the current mix of scrollbar types as many applications don't yet use those overlay scrollbars.
Is there a way to disable overlay scrollbars (without removing the overlay-scrollbar package)?
I'm in the process of adding my OpenPGP key to Launchpad and I just uploaded it to Ubuntu's keyserver. Now I can only continue once the key is available through the keyserver. Is there a way to check if that's already the case?
I'd like to know how I would build Unity from source code in the current development release. Please cover the following topics:
In Unity, are there any pre-defined shortcuts, e.g. to open the dash or unhide the launcher?
Using ssh -X user@host I can start programs on the host and X11 forwarding allows me to see their windows on the remote machine. However, I'd like to be able to forward/redirect existing windows.
How would I do that (if it's possible at all)?
Note, VNC is not an option (no server installed on the host and my user has limited permissions).
Is there a way to find out if a filesystem check is scheduled for the next boot?
Maybe it's similar to a forced check, which gets triggered by the existence of the file /forcefsck?
What I want is the following:
Setting the volume levels isn't the problem, but I somehow need to do this when un-/plugging the headphones, so I'm looking for a way to get notified of those events.
I quickly found /proc/asound/card0/codec#0 to indicate whether headphones are plugged in or not, so I tried to monitor it using inotifywait and change the volume level based on modified notifications. Unfortunately inotifywait failed because proc isn't an ordinary filesystem.
Are there other ways to do this (maybe via PulseAudio)?
Audio device: Intel HDA, audio codec: Conexant CX20585.
To summarize what I've tried so far:
So, I'm still looking for an easy way to do this.
I'd like to know if it's safe to rename user folders such as Desktop, Documents, Music (I want them to start lowercase).
Are there any programs in a default installation of Ubuntu (10.10/11.04) that expect those folders to exist and that cannot be configured to use different ones?
I'd like to find out which packages
sudo apt-get build-dep <package>
would install (if I already got some dependencies installed, I'd also like to see those → so running or simulating the above is not enough). Command line preferred.
I'd like to set the CPU frequency scaling governor for all cores at once instead of doing it individually for each core. Is there a way to do this?
(I know it would be easy to echo the governor to /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor, but I'm not looking for a custom solution.)
I need to add the boot parameter foo=bar to my kernel. How can I do this once for testing, and permanently if testing was a success?
Is it possible to switch between Nvidia's BLOB and Nouveau video drivers on-the-fly?
I think I need to be able to:
*) After a bit of talk with the guys at #nouveau, it seems to be difficult or even impossible with the current Ubuntu setup (builtin vesafb). I'm trying to get it to work with uvesafb, but for now the scripts in the answer do what I was looking for.
Is there an equivalent to gconf-editor for GSettings/dconf?
I know that I can use gsettings set ... on the command line, but that's a bit inconvenient (especially with list types).
It's all in the title.
Eg. if I have a gnome-terminal opened and I click on the gnome-terminal launcher icon, the running terminal will focus and no new instance will pop-up. Also, there is no item in the launcher icon's quicklist that would allow me to start a second instance of the program.