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  • How to protect Ubuntu from fork bomb

    - by dblang
    I heard someone talking about a fork bomb, I did some research and found some dreadful information about some strange looking characters people can have you type at the command line and as a result do bad things on the computer. I certainly would not issue commands I do not understand but one never knows what can happen. I heard that some OS allows the administrator to place some limit on user processes to mitigate the effects of fork bombs, is this protection in Ubuntu by default or would a person with sudo privilege have to set this? If so, how?

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  • Analog sticks not working, qtsixa+PCSX combination

    - by Otto Boström
    A few days ago I finally got my PS3 controller to work with QtSixA, and then in PCSX after some tweaking with the controls. But, I haven't figured out how on earth I will be able to get the analog sticks working. I've been triyng to add them in the controls for all angles in PCSX, where you move the analog stick the way it's supposed to be and then clicking a button to change the setting. I've enabled joysticks in the options for the controller, and my options in my controller are: [x] Enable buttons [x] Enable sensitive buttons [x] Enable Axis [ ] Enable accellerometers [ ] Enable Acceleration [ ] Enable Speed [ ] Enable position The controller is a standard PS3 controller, Dualshock 3. Plugged in with USB cable. Thanks in forehand!

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  • Difference between ~/folder and /home/username/folder when creating a path in /etc/environment

    - by r0xx4nne
    I had an executable script on my ubuntu located on ~/project/ directory and I tried to add that path to /etc/environment . So , I edit the path to this PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:~/project/" . Then , I logout and login back , open the terminal as su and run the command to execute my script on that folder but the result is command not found. Then, I change the path in /etc/environment to PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/r0xx4nne/project/" and voila it works.Now i can run the executable script inside ~/project/ without fail under su command. My question is , what's the difference between ~/project and /home/r0xx4nne/project when it comes in case of creating a path in /etc/environment ? Why it happened to be like this? I am a newbie and I just want to know more . Thanks for any reply .

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  • no sudo permissions to /etc/hostname

    - by Pagis
    When I try to edit my /etc/hostname file, using sudo nano /etc/hostname (or any other editor) I get the following: Error writing /etc/hostname: Permission denied I then tried: sudo chmod u+w ./hostname And got the error: chmod: changing permissions of `./hostname': Operation not permitted I get the same error trying to add write permissions to any use or group. This is what ls shows: -rw-r--r-- 1 root root 22 2012-06-18 12:25 /etc/hostname Any idea why and what can I do about it? I'm running Ubuntu 11.10.

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  • Shortcut to switch between Analog Stereo output & HDMI audio output

    - by iJeeves
    To switch to HDMI audio output (of monitor) and back to normal audio output from system audio jack (for headphones, as my monitor doesn't have audio out), I find myself opening up sound preferences and selecting the right channel everytime. Is there any way I can create a toggle button in the panel or assign some shortcut key to toggle since I do the switching so often. :aplay -l **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: Intel [HDA Intel], device 3: HDMI 0 [HDMI 0] Subdevices: 0/1 Subdevice #0: subdevice #0 card 0: Intel [HDA Intel], device 7: STAC92xx Digital [STAC92xx Digital] Subdevices: 1/1 Subdevice #0: subdevice #0

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  • How can I downgrade a system that accidentally had backports installed?

    - by Glyph
    I installed a fresh Ubuntu system. Somehow - possibly through my own error - the backports repository got enabled. Then I did several upgrades. I noticed that this happened when networking suddenly stopped working, "Network Settings" now has an "(alpha)" in the title bar, "System Settings" ? "Network" now displays an error dialog saying "The system network services are not compatible with this version". Now, I've disabled the backports repository, and I'd like to restore my system to its previously-functional state. My question is twofold: How do I determine which packages were installed from backports? Can I automatically re-install all those packages (and purge their configuration) to get back to a sensible state? If the answer to 2 is "no" I can probably manually purge some things and reinstall, but it would be nice to have it handled automatically. Update: It wasn't an update that broke the network; it was apt-get install indicator-network, which installed something called "connman" and removed network-manager and network-manager-gnome. Nevertheless I am leaving the question up, since I am still interested in how I can purge packages from a particular source after accidentally adding that source, and how I can determine which packages were installed from where.

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  • How do I get long command lines to wrap to the next line?

    - by BrianH
    Edit It was my .bashrc file. I've copied the same profile from machine to machine, and I used special characters in my $PS1 that are somehow throwing it off. I'm now sticking with the standard bash variables for my $PS1. Thanks to @ændrük for the tip on the .bashrc! ...End Edit... Something I have noticed in Ubuntu for a long time that has been frustrating to me is when I am typing a command at the command line that gets longer (wider) than the terminal width, instead of wrapping to a new line, it goes back to column 1 on the same line and starts over-writing the beginning of my command line. (It doesn't actually overwrite the actual command, but visually, it is overwriting the text that was displayed). It's hard to explain without seeing it, but let's say my terminal was 20 characters wide (Mine is more like 120 characters - but for the sake of an example), and I want to echo the English alphabet. What I type is this: echo abcdefghijklmnopqrstuvwxyz But what my terminal looks like before I hit the key is: pqrstuvwxyzghijklmno When I hit enter, it echos abcdefghijklmnopqrstuvwxyz so I know the command was received properly. It just wrapped my typing after the "o" and started over on the same line. What I would expect to happen, if I typed this command in on a terminal that was only 20 characters wide would be this: echo abcdefghijklmno pqrstuvwxyz Background: I am using bash as my shell, and I have this line in my ~/.bashrc: set -o vi to be able to navigate the command line with VI commands. I am currently using Ubuntu 10.10 server, and connecting to the server with Putty. In any other environment I have worked in, if I type a long command line, it will add a new line underneath the line I am working on when my command gets longer than the terminal width and when I keep typing I can see my command on 2 different lines. But for as long as I can remember using Ubuntu, my long commands only occupy 1 line. This also happens when I am going back to previous commands in the history (I hit Esc, then 'K' to go back to previous commands) - when I get to a previous command that was longer than the terminal width, the command line gets mangled and I cannot tell where I am at in the command. The only work-around I have found to see the entire long command is to hit "Esc-V", which opens up the current command in a VI editor. I don't think I have anything odd in my .bashrc file. I commented out the "set -o vi" line, and I still had the problem. I downloaded a fresh copy of Putty and didn't make any changes to the configuration - I just typed in my host name to connect, and I still have the problem, so I don't think it's anything with Putty (unless I need to make some config changes) Has anyone else had this problem, and can anyone think of how to fix it? Thanks in advance! Brian

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  • Alienware M17x R3: Possible downclock

    - by Ywen
    I installed recently Kubuntu 11.10 32 bits (had graphics driver issues, wanted to try on 32 bits version) on my new Alienware M17x, with a Core i7-2670QM CPU. Cores are supposed to be clocked at 2.2 GHz, however the output of $ cat /proc/cpuinfo | grep -i "hz" gives me: model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 model name : Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz cpu MHz : 800.000 If useful, the AC adapter is plugged in (yet the ouput is the same when the computer is powered only by the battery) and I have Firefox and Eclipse running. Does /proc/cpuinfo reflect a possible automatic downclock made to save power if processor load is low or is this output abnormal? EDIT: Ok, I checked and yes, the ouput does vary in function of the load. I reach 2.2 GHz when needed. But my following problem remains. I was checking my CPU clocking because I experienced poor performances when reading 720p video files on Ubuntu with VLC or mplayer when on battery (and I believe VLC by default only uses CPU, not GPU to decode), whereas I haven't got such problems with VLC on Windows (which made me think it wasn't coming from a BIOS option, plus every option in the BIOS regarding the CPU is turned ON).

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  • No wireless network recognized on a Dell Vostro 3560

    - by Itai
    I just installed Ubuntu 12.04 along with Windows 7 on the same laptop - Dell Vostro 3560. Now, on Windows 7 I can access to different wi-fi networks. However, when I am logging onto the Ubuntu section (after re-starting my laptop) - an error message appears: Disconnected - you are now offline When I take a look at my network menu (in the upper bar on the screen), I see that no network is found (and I have a few of them in the area. ). I tried to look around but really could not find a concrete practical solution to this specific problem, would appreciate any solution from anyone out there that had this problem and solved it.

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  • I installed the Nautilus Actions Configuration utility but I don't have the action configuration menu option

    - by userman
    I am tyring to set up my trash to securely delete items and I am following the instructions on this page. http://techthrob.com/2010/07/07/adding-a-secure-delete-option-to-nautilus-file-manager-in-linux/ I installed the Nautilus Actions Configuration utility and according to the previously listed page a new action configuration menu option should have shown up in the Nautilus preferences menu. It didn't. Any help would be appreciated. Thanks!

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  • Rebuild package from upstream source?

    - by Andrew
    I'm trying to rebuild a package (specifically grub2) to overcome some bugs that have been fixed upstream but not fixed in Ubuntu, and have the package integrate into Ubuntu properly. The package is hosted in bzr both on Launchpad and GNU Savannah. How can convert a "raw" upstream source package into an "Ubuntu" version and recompile/repackage it? I've worked out that I can get the latest Ubuntu version of the package source with apt-get source, but there are significant differences to the upstream version. What is the best course of action here?

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  • Unknown filesystem with GRUB rescue caption cannot boot

    - by Dom
    I just recently partitioned my hard drive and I got this error when booting Ubuntu on that drive. unknown filesystem followed by the GRUB rescue terminal. I did some research and tried to download super grub disk but I cant seem to fix it with that. I have two hard disks. One with Windows Vista on it and the other with Ubuntu which is the one I partitioned. There was 100 GB reserved for all the Ubuntu partitions that I needed and the rest was split into two partitions, one for backup folders for my Windows machine and the other for music production which is the one that I created. The space used to created that was shrunk from my backup partition so I didn't mess with any of the Ubuntu partitions. As of now there are a total of 5 partitions. I also downloaded Rescatux which is another Super GRUB Disk for GRUB 2 not knowing which grub I had. It still didn't work. In Super Grub Disk I tried to swap the hard disk because that was what was said to do in order to fix the grub, that didn't work it said it was unsuccessful. I even tried to unplug the Windows hard disk and run Super GRUB Disk and that wasn't successful either. Is there another way I can fix this? Please any help would be greatly appreciated. I would like to have a nice step by step response.

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  • What's the best Wireframing tool?

    - by DaNieL
    Im looking for something similar to iPlotz or Mockup. I've found Pencil Project, but it require xulrunner-1.9 (seem to be incompatible with xulrunner-1.9.2) to be run as a standalone application; However it can be used as a firefox plugin..but is a bit slower. The error on my desktop (ubuntu 10.04) is: Could not find compatible GRE between version 1.9.1 and 1.9.2.* Does anyone know other software? Edit: open-source softwares are preferred, doesnt matter if free.

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  • Cloned partition not seen correctly by disk utility & gparted

    - by enrico
    Some days ago I cloned my /dev/sda1 partition with clonezilla in partition-to-partition mode to /dev/sda3. It worked, but now that I've finished the setup of system in /dev/sda3, I wanna reinstall /dev/sda1 for other stuffs. This partition is NOT mounted, but ubuntu's DISK UTILITY thinks it is, while it doesn't see as mounted the currently active / partition /dev/sda3. This is the df- TH output : Filesystem Type Size Used Avail Use% Mounted on /dev/sda3 ext4 32G 6.2G 24G 21% / udev devtmpfs 2.2G 13k 2.2G 1% /dev tmpfs tmpfs 845M 906k 844M 1% /run none tmpfs 5.3M 0 5.3M 0% /run/lock none tmpfs 2.2G 115k 2.2G 1% /run/shm /dev/sdb1 fuseblk 321G 147G 174G 46% /Dati Gparted instead, sees /dev/sda1 as NOT mounted (checked with Information option), but it display the BOOT flag on this partition, while the real booted partition /dev/sda3, hasn't it. If I try to format the /dev/sda1 partition, it gives me this error : GParted 0.8.1 --enable-libparted-dmraid Libparted 2.3 Format /dev/sda1 as ext2 00:00:02 ( ERROR ) calibrate /dev/sda1 00:00:00 ( SUCCESS ) path: /dev/sda1 start: 2048 end: 62500863 size: 62498816 (29.80 GiB) set partition type on /dev/sda1 00:00:02 ( SUCCESS ) new partition type: ext2 create new ext2 file system 00:00:00 ( ERROR ) mkfs.ext2 -L "" /dev/sda1 mke2fs 1.41.14 (22-Dec-2010) /dev/sda1 is mounted; will not make a filesystem here! How is possible to correct this behaviour ? Is this due to some lacking option in clonezilla phase ? TIA Enrico

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  • sendmail and local mail server?

    - by Hailwood
    For testing emails I don't want to actually send an email out (and can't anyway as ISP blocks port 25). I have installed Sendmail, and what I want to do is install a mail server on the same pc that is sending the email which I can simply send the emails to, and receive them on my pc. so I am looking for a couple of guides. install and configure sendmail correctly for this. install and configure a mail server correctly for this. setup mail client (evolution) to connect to the mail server Can anyone help with this?

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  • Bring the Dragonborn to Your Desktop with the Elder Scrolls – Skyrim Theme for Windows 7

    - by Asian Angel
    Prepare your desktop for the journey to the world of Tamriel and the epic quest to defeat Alduin with the Elder Scrolls – Skyrim Theme for Windows 7. The theme comes with 16 Hi-Res wallpapers, custom icons, and system sounds from the game that will fill your desktop with legendary adventure. View Additional Screenshots of the Theme Download the Theme HTG Explains: Understanding Routers, Switches, and Network Hardware How to Use Offline Files in Windows to Cache Your Networked Files Offline How to See What Web Sites Your Computer is Secretly Connecting To

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  • Struggles to connect to network when using WPA with a BCM43225

    - by pst007x
    When booting my laptop, it will try to connect to my wireless network, however a window keeps popping up asking me for my security password, which has already been saved. I have to keep deleting my network settings, and reconnecting, otherwise it keeps failing to connect. My wireless is set up with a WPA, I do not want to lower my security because of this, but it is a pain and can take me 15mins plus to finally connect. The problem has only become apparent since a fresh install of 11.10. IPV6 disabled. System info: 01:00.0 Ethernet controller: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe (rev 01) Subsystem: Acer Incorporated [ALI] Device 036d Flags: bus master, fast devsel, latency 0, IRQ 43 Memory at b3400000 (64-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: tg3 Kernel modules: tg3 02:00.0 Network controller: Broadcom Corporation BCM43225 802.11b/g/n (rev 01) Subsystem: Broadcom Corporation Device 04da Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at b2400000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: brcmsmac Kernel modules: wl, brcmsmac ADDITIONAL: In terminal I get this: pst007x@pst007x-ubuntu64:~$ nm-applet start ** Message: applet now removed from the notification area ** (nm-applet:2816): DEBUG: old state indicates that this was not a disconnect 0 ** Message: using fallback from indicator to GtkStatusIcon ** Message: applet now embedded in the notification area ** Message: No keyring secrets found for Auto Access 01/802-11-wireless-security; asking user. ** (nm-applet:2816): DEBUG: foo_client_state_changed_cb Note this line: ** Message: No keyring secrets found for Auto Access 01/802-11-wireless-security; asking user. At this point is where I am asked for the password. Please report WPA issues with Ubuntu 11.10 here: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/892727

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  • ralink rt2860 not working anymore in ubuntu 12.10

    - by greenit
    I just upgraded from Ubuntu 12.04 to 12.10, however, my network card is not working anymore... When i had 12.04 installed, i just had to download the driver from Ralink, go to the directory and enter these commands: $ make $ sudo make install and the network card worked... now, when I want to do this in ubuntu 12.10, it seems like it works, but it doesn't. I can enable the module, it recognizes the network card, but i am unable to connect to any wireless network... How can i get my wireless card working again? If any1 knows a solution, please tell it to me, thx in advance

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  • Volume control keyboard shortcuts not working in 14.04?

    - by user295481
    I run Ubuntu 14.04 on a Sony Vaio CS series laptop. Normally, the volume is controlled by pressing Funcion+F2, F3, and F4 for mute, volume down, and volume up respectively. I accidentally reassigned the volume up keyboard shortcut to a different key. I tried resetting the keyboard shortcut by going into the keyboard shortcuts editor in Ubuntu and pressing Function+F4, but that didn't work. My mute function and my volume down functions both work flawlessly, but volume up doesn't work at all. Please don't answer telling me to change the keyboard shortcut in the Keyboard Shortcuts manager, as I have already tried that. Thanks for your help!

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  • Migrate ldap to another server

    - by user3215
    I have ubuntu(8.10) ldap server running. I am migrating from my old servers to ubuntu 10.04.2 server and I have set up almost all freshly on the new servers. How could I perfectly migrate ldap to the new server after installing ldap?. I found the following to export and import ldap in the google: slapcat -l master.ldif slapadd -c -l master.ldif Is there anything I've to do before/after using those commands?. Any precautions?

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  • Virtualbox will run from 32bit installation CD but not 64bit.

    - by MetaDark
    I am trying to set up Windows in Virtual Box, so I don't need to reboot in the rare occasion that I actually need it. The problem is, Virtual Box doesn't preform any errors when I insert the 32bit installation CD but when I try to use the 64bit installation; What!? I am already using the installation disc! I've checked my BIOS to see if I have SVM (AMD's version of VT) disabled and all I see is "Enabled" I have a K9N6PGM2-V2 motherboard A Triple Core AMD Athlon II A Nvdia NForce 430 integrated graphics card 4GB of RAM An 80GB IDE And a 1TB SATA I don't think the last three specifications matter but just in case XP I am pretty sure the CD isn't broken ( I am going to make sure in just a moment ), what could be the cause to this problem? Edit: The 64bit installation CD is not broken, but I found out when trying to install from the 32bit version that it's trying to upgrade, not preform a fresh install - Odd.

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  • Why is there a lack of Backports of Optional 10.10 or later Packages in repos?

    - by EvilPhoenix
    This question is about backports again, but is specific to the difference in availability of packages. A specific example of this would be the two gcc packages in 10.10's repos: gcc (which is 4.4), and gcc-4.5 (which is gcc 4.5). While this change is in 10.10's repositories, such optional packages aren't included in the 10.04 LTS repositories, and the option to have a gcc-4.5 compiler in 10.04 might help several people (such as myself, who needs the 4.5 compiler for University, and I can't upgrade to 10.10 because it doesnt operate correctly on my system). Is there a reason a lack of such optional packages is in the 10.04 repositories?

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  • alias with parameters

    - by dustyprogrammer
    I was recently starting to setup my usual alias. I ended up needing to pass more information than my alias originally needed $ alias runserver = 'python manage.py runserver' $ runserver 80 // turns out you need sudo $ sudo runserver 80 $ sudo: runserver: command not found Now as I was writing this i realized maybe the alias isn't set for root. Could that be it? If not, could someone explain why this doesn't work. Please and thank you

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  • Why can't I mount this partition?

    - by Mahmoud20070
    I have two hard disks (80 Giga ide and 500 Giga sata) and i installed Ubuntu 11.10 in hard disk 80 giga and give for him 20 gigabyte after that he saw all partition in two hard drivers until one I see it's health in gparted magic and he can see it but can't check it and this photo the problem is on partition sdb5 and I use this command to mount it from terminal and took me this although that this partition working very well in windows and Ubuntu could mount it before please give me any solution unless format or anything well delete my data because it's very important Before when I checked /dev/sdb5, it had errors - now all program didn't appear any errors unless fdisk -l All of my hard disks can be mounted except Partition D or /dev/sdb5. What can I do? I have tried to mount the partition with many different programs like Gparted, KDE Partition Manager, ntfs-3g from the terminal, and the mount command. All of them said something to the effect of: fuse: mount failed: Device or resource busy ...or... one or more block devices are holding /dev/sdb5 I installed Ubuntu 11.10 again today to see if anything had changed. The partition works fine under Windows.

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  • Digikam: What's the problem?

    - by Unapiedra
    I installed Digikam by using the Philip5-PPA. When I run it I get the error below. This is by running it through gdb: Starting program: /usr/bin/digikam /usr/bin/digikam: error while loading shared libraries: libcxcore.so.2.1: cannot open shared object file: No such file or directory [Inferior 1 (process 29894) exited with code 0177] What should I do to find the error and fix it? I can see that somehow libcxcore.so.2.1 is wanted but not found. Is this an error of the PPA, or can I simply point it in the right direction? Can I raise an issue with the PPA creator through launchpad? Some next steps would be quite helpful.

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