I had 2 tabs open in gnome-terminal and I detached them by dragging the tab away. Now I have 2 gnome-terminal tabs with my work present, and I would like to clean up my desktop clutter - is there a way to merge them back into a single view?
I've stumbled upon some 3D models embedded in a PDF, e.g. http://cic.nist.gov/vrml/cis/DesignData3.pdf However, with the recent adobe reader I am able to watch such PDFs and also view interactively at those 3D models. So the question is: could I generate such nice PDF with Ubuntu too? TexLive?
How do I check system state when dist upgrade was interrupted during install stage by power-off? I just run dpkg -l | grep -v "^ii" to ensure that I have no broken packages installed. At the first glance everything works but I doubt that as the upgrade dialog was just before crash at 70% of estimated install-work (cleaning and removing wasn't even done too). What should I do next? Reinstall every package?
Background:
I just started to upgrade to 12.04 and wile installing packages the screen went blank (but with visible mouse pointer). I was still able to got to a console by CTRL+ALT+F1 and was still able to log in. Although I couldn't see any process working on dist upgrade which made me very curious, as it was still more than 1h of estimated work to do. I rebooted and System was behaving very slow. After deleting some folders like .gconf, .local, .config, etc.. login was working flawlessly again.
Motivation:
I want to remove applications I do not use to speed up my package processing tasks like dist upgrades, regular updates, but also for saving disk space and other reasons. I know this is a complex topic so first I will ask my question and second I will give some answers I already found out.
Question:
How do I find out which package I did not used at all or for a long time? For example I always use the VLC so I could remove other players like Totem. Of course package dependencies could force me to have programs installed which I will never use.
Notes:
Find the packages which consume much space via synaptic:
Select "Status" in lower left, select "Installed" in upper left, sort column on "size" in upper right. Then you can decide which big packages you really need.
Use aptitude autoremove
Use ubuntu-tweak's Janitor for removing old kernel packages, old configs, apt-cache entries, etc.
Manually search for applications for a given task that you usually solve with your standard app. E.g. Movie player, Music player, Office program, Browser etc. (BTW: this is what I want to be helped with my question)
When removing packages I always favour "apt-get purge" over "aptitude remove --purge" as aptitude often will also remove essential packages due to package dependencies. E.g. when removing "evolution" (as I use thunderbird) aptitude wants to remove also "ubuntu-desktop" and 756 other packages as well, while apt-get just removes evolution and its helping pacakges like evolution-common.
Ubuntu lense gives me most recent used applications which are candidates for keeping :)
Employ deborphan as I read in this related answer: How do I clean up my harddrive?
I should certainly keep essential packages: Keep only essential packages
This question is pretty much a duplicate of How to see what installed packages I have never used for cleaning purposes but covering only few aspects. However one answer suggests to use a program called unusedpkg but the link seems down.
There is also a program called Kleen http://code.google.com/p/kleen/ but it won't compile in 11.10. However I hacked it to compile but the results are unusable, as for example the g++ package was marked as not used for 203 days, but actually I used it seconds ago for compiling Kleen itself ;) So don't use this tool.
On http://wiki.debian.org/DebianPackageInformation I read the the package popularity-contest will produce log files with usage statistics. Unfortunately I didn't enabled the popularity contest so I can't find this log file.
Possible Duplicate:
Is there a way to remove/hide old kernel versions?
On my laptop I have limited space but install all new updates, including kernel updates. However, Ubuntu doesn't seem to uninstall old kernels after installing a new kernel update. I guess this happens with reason: since the new kernel might fail, and it would be nice if GRUB provided a way to select the old kernel to boot with. But do I really need the whole history?, I guess not!:
rc linux-image-2.6.32-21-generic
rc linux-image-2.6.32-24-generic
rc linux-image-2.6.32-25-generic
rc linux-image-2.6.35-22-generic
rc linux-image-2.6.35-23-generic
rc linux-image-2.6.35-24-generic
rc linux-image-2.6.35-25-generic
rc linux-image-2.6.35-27-generic
rc linux-image-2.6.35-28-generic
rc linux-image-2.6.35-30-generic
rc linux-image-2.6.38-10-generic
rc linux-image-2.6.38-11-generic
ii linux-image-2.6.38-12-generic
rc linux-image-2.6.38-8-generic
ii linux-image-3.0.0-12-generic
ii linux-image-3.0.0-13-generic
ii linux-image-3.0.0-14-generic
ii linux-image-3.0.0-15-generic
ii linux-image-3.0.0-16-generic
ii linux-image-generic
I thought apt-get autoremove should remove at least some of those images, but it doesn't. I will remove those now by hand, but isn't there a way to do this automatically and to keep, let's say, the last three images? Yes a shell script and a cron job! Any alternatives?
I have a wifi network configured within networkmanager. Unfortunately I cannot use this as long as I sit on my workplace as there is the signal is very low. But when I go over to other workplaces of colleagues it will nearly work. The SSID, however, is visible at my workplace and ubuntu tries to connect again and again. I won't disable Wifi since, I will forget to reenable when I move to other places. Neither I want to delete the network as I will use it on other places at work. So how do I overcome this annoying connection failure dialogs for that network? Is there a maximum number of connection tries I could decrease? I use 11.10.
Thanks for your suggestions.
As Ubuntu has no real root account, why is /etc/ssh/sshd_config allowing remote root login anyway? Isn't that inconsistent?
I know the who command showing me all logged in users. But I want to somehow informed when someone but me loggs into my system. Any applet? Would also be nice if the applet shows the number of distinct users logged in, meaning having a login shell and established ssh connection.
As I've learned from this question, [bracketed] processes listed by the ps aux command are kernel threads. So is there a way to kill them from the command line? If not, I guess the reason for that is to save the user from a higher risk of getting a kernel panic, right?
My mouse wheel behaves very well only within evince I have the following trouble. When switching into uncontinous view mode, I cannot switch to previous page (mouse up) nor to next page (mouse down). I use ubuntu 11.10 with evince 3.2.1-0ubuntu2 from offical repos.
I though this was not implemented, now the funny thing is, on my laptop also running 11.10 this works! So where should I look in order to restore desired behaviour?
this is an FAQ on the website for Evince but without any answer. I searched gconf but with no luck. Even on a per document basis, Evince won't remember this setting! I want it to be off. Any help on this?
I want to toggle windows between:
horizontal maximized <-> horizontal unmaximized ALT+F7
vetical maximized <-> vertical unmaximized ALT+F6
(both) maximized <-> (both) unmaximized ALT+F5
I looked into ccsm but the maximization plugin doesn't work this way or I didn't figured it out.
Thanks for your suggestions.
I am using 11.10 with Unity. When I set e.g. thunderbird as startup application, it will start just after login, but it will be not maximized placed with its window decorators just beneath the global menu, so I am not able to move the window down. I don't know where to search on launchpad for that. Is it just me having these troubles?
BTW: I also enabled the proposed update repo.
I accidentally installed sometime ago the Realplayer to test embedding videos inside PDFs. Anyhow this turned out not to work and wouldn't have been portable eitherway, so I decide to get rid of this tool again. Since its not a package I cannot uninstall with apt-get or dpkg. Its Realplayer 11 Gold.
As one can resize the icons on desktop (not within nautilus) through righ-click menu: "Resize icon..", so where is the size stored for that certain file.
Since one can change the symbol size, e.g. for a preview thumbnail of a photo file on desktop, the preview looks very unsharp and unattractive. Is there a way to modify this? E.g. let the thumbnail generator spend more time on creating those preview icon symbols?
Thanks
as the title says I want to change background of a PDF. This are some slides, and to save toner I thought it would be good to change the background to white. I tried pdftk with its operations: background and stamp, but the don't work as expected:
pdftk old.pdf background white.pdf output out.pdf
pdftk old.pdf stamp white.pdf output out.pdf
I also tried convert (bloating my pdf upto 200MB) as done this way:
convert old.pdf -background white new.pdf
with no luck. Do you know a way I could perform this?