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• Is Dell Inspiron 15R Special Edition compatible with Ubuntu?

  - by Obada Talal Abu Arisheh

  I want to buy a Dell Inspiron 15R Special Edition. On ubuntu.com, it says that Dell Inspiron 15R will work properly. But the special edition has some special issues. I will list the hardware: 3rd Generation Intel® Core™ i7-3612QM processor (6M Cache, up to 3.1 GHz) 15.6" Full High Definition (1080p) LED Display 8GB2 Dual Channel DDR3 SDRAM at 1600MHz 750GB 7200 RPM SATA Hard Drive 8X Tray Load CD/DVD Burner (Dual Layer DVD+/-R Drive) AMD Radeon™ HD 7730M 2GB Built-in Skullcandy™ stereo speakers and Waves MaxxAudio® 4 technology Will it have any problem?

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• Ubuntu security with services running from /opt

  - by thejartender

  It took me a while to understand what's going on here (I think), but can someone explain to me if there are security risks with regards to my logic of what's going on here as I am trying to set up a home web server as a developer with some good Linux knowledge? Ubuntu is not like other systems, as it has restricted the root user account. You can not log in as root or su to root. This was a problem for me as I have had to install numerous applications and services to /opt as per user documentation (XAMPPfor Linux is a good example). The problem here is that this directory is owned by root:root. I notice that my admin user account does not belong to root group through the following command: groups username so my understanding is that even though the files and services that I place in /opt belong to root, executing them by means of sudo (as required) does not mean that they are run as root? I imagine that the sudo command is hidden somewhere under belonging to the root user and has a 775 permission? So the question I have is if running a service like Tomcat, Apcahe, etc exposes my system like on other systems? Obviously I need to secure these in configurations, but isn't the golden rule to never run something as root? What happens if I have multiple services running under same user/group with regards to a compromised server?

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• Add autorandr before kdm starts

  - by Serge Tarkovski

  I want to add autorandr before kdm starts. Autorandr works well within KDE, however, in kdm I still have ugly 1024x768 resolution when my external monitor is connected. I tried adding autorandr --change to /etc/kde4/kdm/Xsetup: #! /bin/sh # Xsetup - run as root before the login dialog appears #xconsole -geometry 480x130-0-0 -notify -verbose -fn fixed -exitOnFail -file /dev/xconsole & /sbin/initctl -q emit login-session-start DISPLAY_MANAGER=kdm /usr/local/bin/autorandr --change >> /tmp/autorandr echo "Xsetup finished" >> /tmp/xsetup-finished A debug message in /tmp/xsetup-finished appears correctly. /tmp/autorandr is empty (so it seems autorandr runs without errors). I also tried to move autorandr --change line before /sbin/initctl -q emit login-session-start DISPLAY_MANAGER=kdm with no effect. P.S. Of course, autorandr profiles I created under KDE session, are in my home folder, but Xsetup script runs under root, so I created a symlink from my ~/.autorandr to /root/.autorandr.

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• ubuntu server 12.04 new installation does not boot

  - by itsols

  I've just installed server 12.04 on a new machine. It's got two network cards and two hard drives. During installation it asked me if I wanted to make it RAID and I said ok to that. Finally, it came to the packages options and I chose things like Samba, LAMP, etc. And then it asked to reboot without the CD. Did that and that's where the problem started. Nothing comes on the screen. Only a blinking cursor. Has anyone experienced this problem? I'm guessing that it may be a RAID issue. Not sure. Any thoughts please...

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• Using a DisplayLink USB video adapter on Ubuntu 12.10

  - by Jason R

  The line of USB video adapters made by DisplayLink has a somewhat sordid history under Linux. In past Ubuntu releases, the process of getting them to work has been somewhat difficult, inspiring a number of past questions on this site: example 1 example 2 example 3 However, there are some indications that version 3.5 of the Linux kernel (which is used by 12.10) contains better support for these adapters, which should make them easier to use. I currently have a single-GPU machine (it is an Nvidia adapter) with dual monitor outputs. I would like to add the DisplayLink adapter to drive a third external monitor. How can I set this up on Ubuntu 12.10?

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• Radeon Mobility HD 5470 Not Working on Ubuntu 10.10

  - by Promather

  I recently bought a new HP DV6-3118SA laptop, but I am having a very discouraging problem with the graphics card. The graphics card is Radeon Mobility HD 5470. It doesn't install by default, but I do get some message suggesting to install the driver. If I install that driver, the next time I reboot, the screen goes blank and that's it! The same happens if I install the proprietary driver (fglrx) from ATI website. Could you please help me with this? EDIT: Following @Ronald and @Oli advice, I am dumping the output of lspci -k: 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: agpgart-intel Kernel modules: intel-agp 00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02) Kernel driver in use: pcieport Kernel modules: shpchp 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: i915 Kernel modules: i915 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) Subsystem: Hewlett-Packard Company Device 144a 00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: ehci_hcd 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05) Kernel driver in use: pcieport Kernel modules: shpchp 00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: ehci_hcd 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel modules: iTCO_wdt 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: ahci Kernel modules: ahci 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel modules: i2c-i801 00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: intel ips Kernel modules: intel_ips 01:00.0 VGA compatible controller: ATI Technologies Inc Manhattan [Mobility Radeon HD 5000 Series] Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: radeon Kernel modules: radeon 01:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series] Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel 02:00.0 Network controller: RaLink RT3090 Wireless 802.11n 1T/1R PCIe Subsystem: Hewlett-Packard Company Device 1453 Kernel driver in use: rt2800pci Kernel modules: rt2860sta, rt2800pci 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03) Subsystem: Hewlett-Packard Company Device 144a Kernel driver in use: r8169 Kernel modules: r8169 7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02) Subsystem: Hewlett-Packard Company Device 144a 7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02) Subsystem: Hewlett-Packard Company Device 144a 7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02) Subsystem: Hewlett-Packard Company Device 144a 7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02) Subsystem: Hewlett-Packard Company Device 144a 7f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02) Subsystem: Hewlett-Packard Company Device 144a 7f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02) Subsystem: Hewlett-Packard Company Device 144a

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• Files backup utility with incremental backups that would keep backup device clean

  - by Wojtek

  I've tested a few of backup utilities and still haven't found one that would satisfy me. Almost every one of them has two options: - full backup - not an option to use frequently - incremental backup - seems right, but there's one thing about it: Incremental backup builds on a base of a full backup, backing up only those files, that were created/changed. The thing is, that after some time you've got a lot of unwanted files from the old backups bloating your backup device. Also, if you'd accidentally delete your full (first) backup file, then the differential backups would be corrupted (you wouldn't be able to restore them). The thing I'm looking for is a program, that would backup files simply by copying them. It would check the backup device whether it contains the file (unchanged): - if yes, it should proceed to the next file (we've got current version backed up) - if no, it would copy the file to the backup device - if the device contains a file that is no longer on our disk, the program would delete it from the backup device Is there any such utility, that would work this way? If not, do you have any hints on how to backup fairly big amounts of data (around 20gb) quite frequently with incremental backups and not be exposed to those unwanted effects of backup size puffing up?

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• Issues with forwarding Iptables

  - by Ricardo Rios

  I have some issues with my redirectioning lines on iptables, it seems it does not work, any help will be appreciated iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -o eth0 -j SNAT --to 10.10.10.1 iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to 10.10.10.1:8080 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8081 -j DNAT --to 192.168.2.51:8081 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34551 -j DNAT --to 192.168.2.51:8081 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8082 -j DNAT --to 192.168.2.52:8082 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34552 -j DNAT --to 192.168.2.52:8082 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8083 -j DNAT --to 192.168.2.53:8083 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34553 -j DNAT --to 192.168.2.53:8083 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8084 -j DNAT --to 192.168.2.54:8084 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34554 -j DNAT --to 192.168.2.54:8084 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 8085 -j DNAT --to 192.168.2.55:8085 iptables -t nat -A PREROUTING -d 200.59.189.125 -p tcp --dport 34555 -j DNAT --to 192.168.2.55:80 echo Ejecutadas Reglas del Firewall

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• Is LightDM is broken? Autologin works

  - by Ben

  I recently upgraded my Mythbuntu box to 11.10. LightDM worked for a while and then I configured autologin on my user account. After some time, I've removed some packages to lean down the system. Now when I log out (from either Unity or Gnome Shell) I lose the X session, LightDM doesn't start back up. If I disable autologin through /etc/lightdm/lightdm.conf I get no login screen & no X. As I said, autologin works and gives me a Ubuntu Classic desktop. This is the only reference in dmesg to lightdm; [ 17.351023] type=1400 audit(1329530135.420:19): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm-guest-session-wrapper" pid=1097 comm="apparmor_parser" Can anyone help?

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• Why did the upgrade from 11.10 to 12.04 ruin my system?

  - by Jared

  After upgrading from Ubuntu 11.10 to 12.04, when I log in, everything is ruined. It's all black, blank white icons, blank black icons on the start menu, and well, nothing works. If I open up Chromium, it looks as though it's in high contrast mode. Is this a bug? Any ideas what could have happened? Can I get 11.10 back? Some photos (can't connect to network in Ubuntu so I had to take pictures with phone): http://i.stack.imgur.com/2dwKl.jpg http://i.stack.imgur.com/N4nA3.jpg http://i.stack.imgur.com/LNFje.jpg

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• What is the version numbering logic for open source developers managing software releases?

  - by Stephen Myall

  I guess this is more of a general question that I cant find the the answer to anywhere. What is the version numbering logic for open source developers managing software releases and is there any governance or guidance I can read up on. The origins of this question comes from me reviewing and researching software on countless websites that I would like to use on my Ubuntu OS. Through experience, I am learning some sites are much better than others explaining if a release is a stable, experimental or maintenance release but these explanations are not consistent with any version numbering logic I am familiar with.

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• USB Bose speakers with ubuntu 12.04

  - by Richard

  On a fresh install of ubuntu 12.04 my Bose USB weren't working at all. I read through a large number of posts here and elsewehre on Bose or USB speakers. I tried many things (modifying a number of different files, etc.). This worked... sort of: USB Audio on 0 volume on startup The AlsaMixer works after I turn up the volume, but the sound crackles a lot. Also, having to use a term mixer to change sound isn't ideal. Any other ideas? Thank you, Richard

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• Juju bootstrap fails with "Temporary failure in name resolution" using Amazon AWS

  - by Will

  I have followed the instructions over at https://juju.ubuntu.com/docs/config-aws.html to try and setup myself with a juju environment. It all seemed to setup alright. SSH keys, Gererate config, repository, adding access id and secret keys to environments.yaml file. Although my key file from aws IAM management console was called credentials.csv rather than rootkey, I couldn't find that link described in the documentation. When I give the command juju bootstrap in the testing page. It fails giving me the error: juju bootstrap ERROR Get https://s3-us-west-1.amazonaws.com/juju-gobblygookmynukmbersinhere/provider-state: lookup s3-us-west-1.amazonaws.com: Temporary failure in name resolution (note I just replaced my numbers for this posting my actual terminal has my numbers in. This is my first attempt at any ec2 work so I have gone in and created new IAM profiles. What have I done wrong? Any help would be great. I think I'm in over my head!

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• I can't install Ubuntu on my Dell Inspiron 15R at all

  - by Kieran Rimmer

  I'm attempting to install Ubuntu 12.04LTS, 64 bit onto a Dell Inspiron 15R laptop. I've shrunk down one of the windows partitions and even used gparted to format the vacant space as ext4. However, the install disk simply does not present any options when it comes to the partitioning step. What I get is a non-responsive blank table As well as the above, I've changed the BIOS settings so that USB emulation is disabled (as per Can't install on Dell Inspiron 15R), and changed the SATA Operation setting to all three possible options. Anyway, the install CD will bring up the trial version of ubuntu, and if I open terminal and type sudo fdisk -l, I get this: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xb4fd9215 Device Boot Start End Blocks Id System /dev/sda1 63 80324 40131 de Dell Utility Partition 1 does not start on physical sector boundary. /dev/sda2 * 81920 29044735 14481408 7 HPFS/NTFS/exFAT /dev/sda3 29044736 1005142015 488048640 7 HPFS/NTFS/exFAT /dev/sda4 1005154920 1953520064 474182572+ 83 Linux Disk /dev/sdb: 32.0 GB, 32017047552 bytes 255 heads, 63 sectors/track, 3892 cylinders, total 62533296 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xb4fd923d Device Boot Start End Blocks Id System /dev/sdb1 2048 16775167 8386560 84 OS/2 hidden C: drive If I type 'sudo parted -l', I get: Model: ATA WDC WD10JPVT-75A (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 41.1MB 41.1MB primary fat16 diag 2 41.9MB 14.9GB 14.8GB primary ntfs boot 3 14.9GB 515GB 500GB primary ntfs 4 515GB 1000GB 486GB primary ext4 Model: ATA SAMSUNG SSD PM83 (scsi) Disk /dev/sdb: 32.0GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 8589MB 8588MB primary Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: Can't have a partition outside the disk! I've also tried a Kubuntu 12.04 and Linuxmint install disks, wityh the same problem. I'm completely lost here. Cheers, Kieran

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• What is "umask" and how does it work?

  - by Lekensteyn

  I believe that umask is something that controls file permissions, but do not fully understand it. After running umask 0644 in a terminal, I cannot read the files I create with the command-line text editor nano. I noticed that the permissions of that file are set to 0022 instead of the default 0755. How does umask work? I thought I could just remove the each digit in the umask from 0777, 7 - 6 = 1 and 7 - 4 = 3, so I expect the permissions to be 0133, but apparently, this is not the case. What is umask exactly? Explain it to me like I was a "Linux noob" How do I calculate with umask? What are use cases for umask?

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• Installing Gnome Classic on Ubuntu Server 12.04.1 64bit

  - by varunyellina

  I've installed Ubuntu Server Edition and setup open ssh,samba and lamp on my home desktop just to work on LAN. I also want setup a GUI on it for daily use. I've already performed the following sudo apt-get install gnome-session-fallback sudo apt-get install lightdm-gtk-greeter sudo apt-get install xinit I don't want to install Unity or the Gnome3 Shell on my system. Also I haven't found instructions to installing gnome-classic on a server edition(although it shouldn't make a difference).How do I get it to work?

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• what could cause a script to fail to find python when it has `#!/usr/bin/env python` in the first line?

  - by jcollum

  Trying to get casperjs running on Ubuntu 12.04. After installing it when I run I get: 09:20 $ ll /usr/local/bin/casperjs lrwxrwxrwx 1 root root 26 Nov 6 16:49 /usr/local/bin/casperjs -> /opt/casperjs/bin/casperjs 09:20 $ /usr/bin/env python --version Python 2.7.3 09:20 $ cat /opt/casperjs/bin/casperjs | head -4 #!/usr/bin/env python import os import sys 09:20 $ casperjs : No such file or directory 09: 22 $ python Python 2.7.3 (default, Sep 26 2013, 20:03:06) [GCC 4.6.3] on linux2 So Python is present and runnable, casperjs is pointing to the right place and it is a python script. But when I run it I get "No such file". I can fix it by changing the first line of the casperjs python file from: #!/usr/bin/env python to: #!/usr/bin/python Result: $ casperjs --version 1.1.0-DEV I managed to fix it, but I'm wondering why it didn't work with #!/usr/bin/env python, since that seems to be a normal interpreter line. Do I have something configured wrong? Here are the steps to get casperjs: $ git clone git://github.com/n1k0/casperjs.git $ cd casperjs $ ln -sf `pwd`/bin/casperjs /usr/local/bin/casperjs $ casperjs : No such file or directory

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• How do I fix postfix TLS?

  - by Savanni D'Gerinel

  STARTTLS was working with my system earlier today. Without me altering the system in any way, it spontaneously broke. I've now been trying to fix it for a couple of hours, to no success. When I connect to the server, this is what I get: savanni@Orolo:~$ telnet apps.savannidgerinel.com 25 Trying 129.121.182.135... Connected to apps.sasavanni@Orolo:~$ telnet apps.savannidgerinel.com 25 Trying 129.121.182.135... Connected to apps.savannidgerinel.com. Escape character is '^]'. 220 *********************************************** ehlo dude 250-apps.savannidgerinel.com 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-XXXXXXXA 250-AUTH PLAIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN ^]close telnet> close Connection closed. Okay, obviously STARTTLS isn't present in this list. So I've been digging through my configuration files and working through the tutorials again, and that has done me no good at all. Here's my tls-related configuration: smtp_tls_CAfile = /etc/ssl/certs/savannidgerinel_com_CA.pem smtp_tls_cert_file = /etc/ssl/certs/apps.savannidgerinel.com.pem smtp_tls_key_file = /etc/ssl/private/apps.savannidgerinel.com.key.pem smtp_tls_security_level = may smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_tls_CAfile = /etc/ssl/certs/savannidgerinel_com_CA.pem smtpd_tls_cert_file = /etc/ssl/certs/apps.savannidgerinel.com.pem smtpd_tls_key_file = /etc/ssl/private/apps.savannidgerinel.com.key.pem smtpd_tls_loglevel = 3 smtpd_tls_received_header = yes smtpd_tls_security_level = may smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache tls_random_source = dev:/dev/urandom All of the certificate files are present, the server private key is present, the server CA is present, and the smtpd_scache.db and smtp_scache.db files are both present. All are accessible to the postfix user. Speaking of which, here are the processes running: savanni@apps:/var/lib/postfix$ ps aux | grep postfix root 3525 0.0 0.1 25112 1680 ? Ss 20:19 0:00 /usr/lib/postfix/master postfix 3526 0.0 0.1 27176 1524 ? S 20:19 0:00 pickup -l -t fifo -u -c -o content_filter= -o receive_override_options=no_header_body_checks postfix 3527 0.0 0.1 27228 1552 ? S 20:19 0:00 qmgr -l -t fifo -u postfix 3528 0.0 0.4 46948 4144 ? S 20:19 0:00 smtpd -n smtp -t inet -u -c -o stress= -s 2 postfix 3529 0.0 0.1 27176 1628 ? S 20:19 0:00 proxymap -t unix -u postfix 3530 0.0 0.3 38212 3176 ? S 20:19 0:00 tlsmgr -l -t unix -u -c postfix 3531 0.0 0.1 27176 1516 ? S 20:19 0:00 anvil -l -t unix -u -c postfix 3535 0.0 0.1 27188 1544 ? S 20:20 0:00 trivial-rewrite -n rewrite -t unix -u -c The log files say absolutely nothing related to TLS except for this: Nov 6 02:19:45 apps postfix/master[3525]: daemon started -- version 2.9.6, configuration /etc/postfix Nov 6 02:19:49 apps postfix/smtpd[3528]: initializing the server-side TLS engine Nov 6 02:19:49 apps postfix/tlsmgr[3530]: open smtpd TLS cache btree:/var/lib/postfix/smtpd_scache Nov 6 02:19:49 apps postfix/tlsmgr[3530]: tlsmgr_cache_run_event: start TLS smtpd session cache cleanup Nov 6 02:19:49 apps postfix/smtpd[3528]: connect from unknown[204.16.68.108] Neither syslog nor mail.err shows any indication of a problem. As far as the whole system is concerned, all is well. But there is no STARTTLS and so I suddenly can't send any email at all. Help???

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• Is it possible to copy U1 files between two PCs locally when an Ubuntu user account is recreated?

  - by Federico Ghigo

  I have 2 Ubuntu 11.04 PCs (desktop and laptop), both synced via U1. Recently I completely rebuilt the user account (completely deleted the home directory) on one of the two (the desktop), and now I have to resync. Problem is that the PC is on a slow connection and I have difficulties resyncing the 14gb of data. Of course I have the opportunity of moving it to a place where the connection is faster, but it's not comfortable, and it will take some time. Since the laptop is in sync with the account I was wondering if stopping the service and copying the files + some database (which files is the question) could let me avoid resyncing everything.....

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• Does Ubuntu Touch consume less than Android?

  - by Eduard Florinescu

  One of the problems of new OSs is power consumption. That is because power and performance requires a lot of tweaks and experience with the kernel, drivers and OS code-base on one hand, and a lot of extensive long-term test and quality assurance on the other hand. Given that Android is a rather old and established OS I saw that it has pretty good power consumption. Phoronix does this kind of comparissions but I was not able to find to much about Ubuntu Touch. Does Ubuntu Touch consume less than Android in general, do you have data on some platforms compared?

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• ban an IP temporarily after x-many incorrect password attempts

  - by sova

  My new web server got hacked (sigh). I have physical access to my machine (in the near future). It seems like the only changes was a new user account and a borked sudoers file. It seems as though the password was discovered by dictionary searching (I didn't pick it). After I fix these problems (or do a full reinstall?) I want to add a mechanism to ban an IP (for maybe 24 hours or some time limit) after getting the password wrong x number of times, but I'm not a unix sysadmin or anything, so I'm not really sure where to get started. The machine is running Lucid Lynx, from an Ubuntu minimal installation. Thanks,I appreciate your help guys. Hopefully this is the right place for this question.

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• Unity's gone! How do I get it back?

  - by Kelley

  Earlier today my Unity desktop disappeared: I got a black screen with white text, but it disappeared too quickly for me to read. When the desktop reappeared, it was the Ubuntu Classic desktop. I used $ unity --reset but that did not do anything. I tried rebooting so I could choose unity from the list when I logged in, but although there was Ubuntu choice, there was no unity listed (but classic was listed). I was able to install Unity 2D and am using that, but really want to get 3D back. I had been using Ubuntu without problems for several weeks when this happened. My graphics card is onboard a Dell Latitude desktop - a couple years old - and is reported as an Intel G33/G31. I've looked at other requests for help here, and tried suggestions when they seemed to relate to similar problems, but nothing seems to work so far. Any ideas? Thanks! This is part of the output of my latest attempt to run unity --reset Window manager warning: 0x3e01c35 () appears to be one of the offending windows with a timestamp of 1309472834. Working around... Window manager warning: last_user_time (1309473695) is greater than comparison timestamp (1126160). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around... Window manager warning: 0x4c0046c (mdk@Habane) appears to be one of the offending windows with a timestamp of 1309473695. Working around... Window manager warning: Received a NET_CURRENT_DESKTOP message from a broken (outdated) client who sent a 0 timestamp Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x4c0046c (mdk@Habane) Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.

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• early audio offset in Audacity and VLC, but not Banshee

  - by reek

  I'm editing audio files with speech in Audacity, marking particular types of speech. I just noticed that files edited in Windows have different intervals marked than files edited in Ubuntu. After testing and confirming this error, it seems that the audio playback in Ubuntu clips the sound too early from the end (early offset), which causes the person doing the editing to mark the interval wrongly. Interestingly, the error appears in Audacity and VLC (which I sometimes use for playback), but NOT Banshee. Since both Audacity and VLC have this problem, I assume it is not application-specific. I don't know why Banshee handles this without problem though... Are there any ALSA or Pulseaudio settings that are likely to cause this problem (I know very little about either)? The task itself does not appear to consume large amounts of resources, but I am on an old laptop, so here are my specs: Ubuntu 11.10. Dell XPS m1210 1.6 GHz Intel Core, 2 x 512 Mb 667 MHz RAM, Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01). Audacity settings: Device Interface: ALSA (cannot select anything else)

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• Running UBUNTU from a USB Flash drive on Acer

  - by Byron Blue

  I've made a bootable USB flash drive to run UBUNTU. The drive works fine on MOST laptops/computers I try: It does not want to start on my (favourite) Acer Aspire 5745 (Windows 7 64 bit). The opening screen has SYSLINUX 4.06 EDD 4.06-pre1 (...) and simply sits there. I was using UBUNTU 12.04.1 64 bit until I tried booting to the Acer this morning. I've tried booting to 10.04 as well (saw this as a fix on a discussion) with the same result. I really want to use the Acer for development and do not want to wipe my Windows 7 from the hard disk. Are there any solutions/answers?

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• Ubuntu 12.04 LTS: Error message "Failed to execute child process"

  - by Ron

  I am an Ubuntu-newbie and just started working with Ubuntu (version 12.04 LTS) a couple of days ago. I wanted to add a launcher icon to desktop for launching an application I previously installed. Up to now I can only launch it by typing setsid matlab -desktop into my terminal. Now there is the following problem with the execution via the desktop icon: Whenever I click the desktop icon, I get the following error message: "Failed to execute child process" I would like to add a screenshot, but unfortunately as a new user, I am not allowed to... In the main menu from where I added the icon via drag'n'drop to desktop there is also a permission to execute the .desktop file. I also tried to look for advice on the error message "Failed to execute child process..." but could not find anything useful. Now does anybody have an idea what I am missing? Sorry if this is a stupid question ;) ...but as I just said: I just started with Ubuntu... Thanks to everybody in advance for their help! :) And let me know if you should need any more information... Regards, Ron

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