Logging into a server with ssh produces the landscape-generated message of the day, which includes the suggestion for using https://landscape.canonical.com/ to graph data:
Graph this data and manage this system at https://landscape.canonical.com/
How can I trim this or other lines from the ssh greeting? With legal boilerplate added to the login banner already, I'd like to keep some information from landscape-sysinfo, but see less of it.
What's a general way to control the accessibility options from the command-line? These are usually set from the 'Universal Access' GUI, but I'd like to know if there is a common way to control these settings that does not rely on the GUI.
I want to have an inverse color effect (light to dark) like 'negative' in compiz, but without compiz, and only for one window (like compiz's Super+N) .
Is there a way to get a similar effect (toggled by a key combo preferably) without compiz? I can invert colors for the entire desktop with xcalib -I -a, but I can't restrict it to a single window.
I recently upgraded my Dell E6510 laptop to 12.04 (Ubuntu with Unity). I've noticed that after every reboot, the volume always resets itself to a maximum level.
While I try to work out whether this is a bug, I'd like to know if there is something I can do at login or startup that will mute (or perhaps just reduce) the system volume.
After checking reverendj1's answer, I tried pacmd set-sink-volume 0 0 and then sudo alsactl store, after the first command failed to work.
I also did a right-click on the volume indicator and went to Sound Settings..." -- from there, I selected Built-in Audio Analog Output on the Output tab (it was my only choice, but it wasn't highlighted for some reason).
During this troubleshooting process, I rebooted a few times. I'm not 100% sure whether any of the Analog Output settings had ever been altered from the install defaults, but I'm documenting the setting for posterity, in case someone else runs into this:
I upgraded to 11.10, and now I notice that when I shut down, I get a weird "bizcom" logo with a backwards copyright symbol:
At first this made me think I had installed some dubious hacked package, but I haven't found any. Then I thought it might be related to my newish Asus monitor, and something the upgrade triggered so that it goes into its own shutdown mode. This doesn't seem to be the case either (even though Ubuntu now identifies the monitor by OEM name that's new to me, "Ancor Communications".). Where is this "bizcom" image coming from, and how do I get rid of it?
I'm not sure when it happened, but on my 11.10 desktop system, the clock indicator no longer appears. Where has the lost time gone?
Under 11.04, the option to control the pointer with the numpad was set in the Hardware/Keyboard settings page.
How can I turn on mousekeys or configure them in newer releases?
I've been looking at gaming keyboards to use on Ubuntu system.
Microsoft has a few popular ones (e.g., Sidewinder X4, X6), but the programmable function keys appear to be unusable without the Windows software. (Though here's a post from someone who has a more recent project that uses usbmon and xdotool to add functions to some keys.)
Another choice in my budget is the Cyborg V.05. It seems about right for my needs, but I would be depressed having a bunch of useless, nonprogrammable keys on it.
Logitech has some models (e.g., the Logitech G110), though again I expect that the extensive macro capabilities (which I don't need) would be lost under Linux. There's a project called g15tools which has some code to work with older Logitech gaming models, but I don't know what the current status is. Last entry there was in March 2010. There are also a number of very old posts around the internet with regard to the Logitech G11 and G15. Compatibility with the current keyboards, Ubuntu version, and Linux kernel are suspect.
I'm in the U.S., and so it appears that few of the Roccat keyboards are available, and they're over-priced. Support might be OK for these, though -- there's a short Phoronix article about Roccat improving their Linux support, and there's also a project and webpage for "Using Roccat Hardware with Linux".
Honestly, the only feature I have to have is good backlighting for the keys, and if it's not wired (which is fine), the wireless capability should function. I could probably live with dead function keys, as long as they weren't in places that would interfere with things like Unity/compiz shortcuts.
Any experience or suggestions?
I've not seen much to inspire confidence with programmable/macro keys. There is a thread (with no solutions) on the Sidewinder X4 on ubuntuforums here.
I'm also considering the Logitech Illuminated Keyboard as a possibility, even though it's not specifically a gaming keyboard. It is backlit, and it's supposed to be a nice keyboard.
I've seen solutions for Unity issues involving GSettings, such as
How do I reset my Unity configuration?
and How do I access and enable more icons to be in the system tray?
I haven't found out how to use it with Unity. Is it documented somewhere?
I have unattended-upgrade set up on my Ubuntu systems. Occasionally I will log in remotely to one of them and I'll see a message informing me that I need to reboot the system (in order to complete an upgrade). Is there a way to determine the specific package (or set of packages) which is triggering this notice?
After using just plain kill <some_pid> on Unix systems for many years, I learned pkill from a younger Linux-savvy co-worker colleague1.
I soon accepted the Linux-way,pgrep-ing and pkill-ing through many days and nights, through slow-downs and race conditions. This was all well and good.
But now I see nothing but killall. How-to's seem to only mention killall, and I'm not sure if this is some kind of parallel development, or if killall is a successor to pkill, or something else.
It seems to function as a more targeted pkill, but I'm sure I'm missing something.
Can an Ubuntu/Debian-savvy2 person explain when (or why) killall should be used, especially if it should be used in preference to pkill (when pkill often seems easier, because I can be sloppier with name matching, at least by default).
When speaking of killall, I'm not thinking of the command that on some Unix systems (Solaris, AIX, ?) would kill all user processes. Here's a description of that version, from a manpage for IBM's AIX:
The killall command cancels all processes that you started, except those producing the killall process. This command provides a convenient means of canceling all processes created by the shell that you control. When started by a root user, the killall command cancels all cancellable processes except those processes that started it. If several Signals are specified, only the last one is effective.
1 'colleague' is free upgrade from 'co-worker', so might as well.
2 Originally I thought this was a Linux or Debian thing, but some sources are saying that the Linux killall is derived from BSD-flavored Unix.
If I am using the command line in xterm, gnome-terminal, etc., I can keep sudo from re-prompting for a password, within some limits, or I can disable it.
As a compromise between usability and security, I usually just want this re-querying wait-time lengthened.
By default, there is only a 15 minute grace-period after entering a sudo password before it prompts for it again. To change this to 45 minutes, I can edit /etc/sudoers, and set timestamp_timeout to the waiting period I want (in minutes) .
If I am within the same terminal session, and start a new shell (typing in csh or bash) the wait period is respected.
But if I go to another window to access the command line there, it will immediately ask for my password if I try to sudo.
Within the same pseudoterminal session (pts) (for example, if I spawn a new shell inside the same gnome-terminal window), the timeout is respected.
If I launch a new xterm, gnome-terminal, etc., I must enter credentials again.
Despite being the only user active on my home system (a single-user system), etc., sudo doesn't trust that all of my pts entries are from the same user:
~/pseudoland$ w
01:27:39 up 1 day, 15:03, 7 users, load average: 0.32, 0.71, 0.77
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
jgb tty1 23:56 1:30m 0.55s 0.51s -bash
jgb tty7 :0 Tue10 39:03m 2:28m 0.76s gnome-session
root pts/1 :0.0 00:30 56:23 0.01s 0.01s /bin/bash
jgb pts/3 :0.0 01:16 0.00s 0.59s 3.22s gnome-terminal
jgb pts/4 :0.0 01:27 26.00s 0.23s 0.23s /bin/bash
jgb pts/5 :0.0 01:17 9:26 0.23s 0.23s bash
Is there a way to tell sudo that it should regard all the windows I open as coming from the same user, and to not ask again for my password if the last sudo timer hasn't expired?
Sadly, everything I've tried so far has been painful to manage between two computers, (even between different browsers on the same computer).
So, right now I have different aggregations of bookmarks passwords in xmarks, delicious, google bookmarks, firefox sync, text files, and in figaro password manager (fpm2).
I've also tried to use bindwood in the past.
What I would like to do is merge all bookmarks and passwords into some solution that actually works either with tools available under Ubuntu, or with a browser-based tool (addon/plugin/extension) which works between between google-chrome/chromium, and firefox.
It would be ideal if there was an ability to send and store passwords encrypted (if not on my own server). Whatever the method, I need the ability to have import from existing sources. (It doesn't have to be pretty, just repeatable.)
It's possible that some things I've ruled out are now workable (e.g., xmarks broke for me at one point because I hit their bookmark limit for the server/account, and bindwood, firefox sync were firefox only).
We have a few Windows(XP & 7) and Ubuntu machines in the house sharing a wireless connection, and want to share music between them. If possible, I would like to be able to serve music from both Windows and Ubuntu (but it doesn't have to be the same time).
I don't know much about sharing folders or streaming, but I'm guessing both would be options (that is, using a local client to access a shared song or a local client to access a shared stream). I want to be able to share the music between the systems as simply as possible.
Bonus points (but not requirements) for
More info:
I understand there is a safer, more targeted way to troubleshoot AppArmor's possible contribution to an issue than completely stopping the service and tearing down AppArmor profiles. Can someone give me the details, and the advantages of the better approach?
My corporate policy says that Linux boxes must be secured with SELinux (so that a security auditor can check the 'yes, we're extremely secure!' checkbox for each server). I had hoped to take advantage of Ubuntu's awesome default AppArmor security. Is it unwise to run both Apparmor and SELinux? (If so, can this bad idea be mitigated with some apparmor and/or selinux tweaks?)
After running Update Manager, a debconf window (titled "Configuring grub-pc"), popped up, requiring me to select the appropriateGRUB install devices for my system. I've made no changes to grub or the filesystem recently, and I don't remember what options I selected last time I did make a change.
How do I know what to select? I'm assuming the wrong answer could render my system unable to boot.
Here's the debconf dialog:
Here's the window and text that is displayed when selecting "help" :
I would like to try a different video display driver, but I'm not sure which one I'm currently using.
What's the simple way to see what driver my system is using currently?
When I log into my user account on Ubuntu 10.10, there is a unsatisfying delay before my system becomes usable. Even launching a terminal, I have to wait a few seconds before the bash prompt appears. During this start-up period, the top process seems to be dropbox. I'm not sure what it's doing exactly (functionality is still fine as far as I can see), but I do know it really doesn't need to be doing it while I'm waiting for desktop to appear. (This is the standard Ubuntu with Gnome desktop, by the way.)
What I would like to do is to be able to have a static or even dependency-based delay for dropbox to start. It would be nice if it waited for, e.g., 10 minutes, or for my browser tabs to load and a typing pause. Then it could churn away on file status or cache-chewing, and I would be happy.
Is there a way to do this? Thanks!
According to this answer, .local .cache and .config are, by convention, configuration storage locations adopted by Gnome and Ubuntu.
Are .gnome .gnome2 and .gconf therefore legacy configuration directories, or are they supposed to co-exist?
And does the adoption of dconf alter these dot-file application config conventions?
Finally, what is the relation of the gconf-editor data settings to these directories? Do .gnome/.gconf contain the same info that gconf-editor accesses?
Updates: XDG has been pointed to as the reason for .cache, .local, and .config.
This question on dconf advises that dconf will be the replacement for gconf, as documented on Gnome.org . Furthermore, João says that dconf is the
GNOME technology used to store application settings. [...] dconf is the GNOME3 replacement for gconf which has not been maintained for some time. dconf is also expected to bring performance improvements over gconf (relevant for applications startup).
I expect, based on that that there will be a somewhat anarchic migration path from gconf settings to dconf. I would love to hear any additional perspectives.