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• How to fix a bootable USB Kubuntu installation when the drive has maxed out?

  - by NoCatharsis

  I used Universal-USB-Installer-v1.5.1 from PenDriveLinux.com with Kubuntu 10.04 so I could set up my 4GB flash drive as a totally independent installation. Unfortunately, there was an OS upgrade available which Kubuntu downloaded and attempted to install. This, along with some other software, apparently maxed out my drive before I realized it. Now when I try to boot from the drive, everything boots as normal to the OS boot screen where I select "Boot from this Kubuntu USB Installation." The startup process initiates, then stalls about halfway through and hangs indefinitely. I'm guessing the drive is trying to use space it doesn't have and completely stops working. I realize that once the OS upgrade is in place, the old files could be deleted for a potential 700MB space gain. However, I just have no way to get into the OS and complete the upgrade. My main OS is Windows 7. Is there a way I can fix this issue from within Windows without formatting the entire drive and reinstalling Kubuntu from scratch?

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• Where to put X11 drivers configuration in Ubuntu Lucid?

  - by vava

  Since hal is removed from Lucid, where now can I put all those little configuration tweaks for mouse and other input devices? In particular, I want to configure ThinkPad trackpad to enable scrolling with middle button. In hal, it was done with <match key="info.product" string="TPPS/2 IBM TrackPoint"> <merge key="input.x11_options.EmulateWheel" type="string">true</merge> <merge key="input.x11_options.EmulateWheelButton" type="string">2</merge> <merge key="input.x11_options.ZAxisMapping" type="string">4 5</merge> <merge key="input.x11_options.XAxisMapping" type="string">6 7</merge> <merge key="input.x11_options.Emulate3Buttons" type="string">true</merge> <merge key="input.x11_options.EmulateWheelTimeout" type="string">200</merge> </match>

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• The simplest Ubuntu mail server

  - by John G.

  After days of trying all sorts of tutorials I finally found a simple solution (not necessary the best) for a functional ubuntu mail server: sudo aptitude install postfix next type sudo dpkg-reconfigure postfix and configure like this: Internet Site yourdomain.com john (type your ubuntu user) yourdomain.com, localhost.localdomain, localhost No 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/192.168.0.1/24 (192.198.0.1 replace with your server ip address) 0 + all next install mail-stack-delivery sudo aptitude install mail-stack-delivery At this point you have a working mail server. Next, I configured SquirrelMail and start sending and receaving mail. This configuration worked with both Apache and Nginx.

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• Tomcat 7 on Ubuntu 12.04 with JRE 7 not starting

  - by Andreas Krueger

  I am running a virtual server in the web on Ubuntu 12.04 LTS / 32 Bit. After a clean install of JRE 7 and Tomcat 7, following the instructions on http://www.sysadminslife.com, I don't get Tomcat 7 up and running. > java -version java version "1.7.0_09" Java(TM) SE Runtime Environment (build 1.7.0_09-b05) Java HotSpot(TM) Client VM (build 23.5-b02, mixed mode) > /etc/init.d/tomcat start Starting Tomcat Using CATALINA_BASE: /usr/local/tomcat Using CATALINA_HOME: /usr/local/tomcat Using CATALINA_TMPDIR: /usr/local/tomcat/temp Using JRE_HOME: /usr/lib/jvm/java-7-oracle Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar > telnet localhost 8080 Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused netstat sometimes shows a Java process, most of the times not. If it does, nothing works either. Does anyone have a solution or encountered similar situations? Here are the contents of catalina.out: 16.11.2012 18:36:39 org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib/jvm/java-6-oracle/lib/i386/client:/usr/lib/jvm/java-6-oracle/lib/i386:/usr/lib/jvm/java-6-oracle/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib 16.11.2012 18:36:40 org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] 16.11.2012 18:36:40 org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] 16.11.2012 18:36:40 org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1509 ms 16.11.2012 18:36:40 org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina 16.11.2012 18:36:40 org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.29 16.11.2012 18:36:40 org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/tomcat/webapps/manager Here come the results of ps -ef, iptables --list and netstat -plut: > ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 Nov16 ? 00:00:00 init root 2 1 0 Nov16 ? 00:00:00 [kthreadd/206616] root 3 2 0 Nov16 ? 00:00:00 [khelper/2066167] root 4 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 5 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 6 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 7 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 8 2 0 Nov16 ? 00:00:00 [nfsiod/2066167] root 119 1 0 Nov16 ? 00:00:00 upstart-udev-bridge --daemon root 125 1 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 157 125 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 158 125 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 205 1 0 Nov16 ? 00:00:00 upstart-socket-bridge --daemon root 276 1 0 Nov16 ? 00:00:00 /usr/sbin/sshd -D root 335 1 0 Nov16 ? 00:00:00 /usr/sbin/xinetd -dontfork -pidfile /var/run/xinetd.pid -stayalive -inetd root 348 1 0 Nov16 ? 00:00:00 cron syslog 368 1 0 Nov16 ? 00:00:00 /sbin/syslogd -u syslog root 472 1 0 Nov16 ? 00:00:00 /usr/lib/postfix/master postfix 482 472 0 Nov16 ? 00:00:00 qmgr -l -t fifo -u root 520 1 0 Nov16 ? 00:00:04 /usr/sbin/apache2 -k start www-data 523 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start www-data 525 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start www-data 526 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start tomcat 1074 1 0 Nov16 ? 00:01:08 /usr/lib/jvm/java-6-oracle/bin/java -Djava.util.logging.config.file=/usr/ postfix 1351 472 0 Nov16 ? 00:00:00 tlsmgr -l -t unix -u -c postfix 3413 472 0 17:00 ? 00:00:00 pickup -l -t fifo -u -c root 3457 276 0 17:31 ? 00:00:00 sshd: root@pts/0 root 3459 3457 0 17:31 pts/0 00:00:00 -bash root 3470 3459 0 17:31 pts/0 00:00:00 ps -ef > iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:http-alt ACCEPT tcp -- anywhere anywhere tcp dpt:8005 ACCEPT tcp -- anywhere anywhere tcp dpt:http-alt Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination > netstat -plut Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:smtp *:* LISTEN 472/master tcp 0 0 *:3213 *:* LISTEN 276/sshd tcp6 0 0 [::]:smtp [::]:* LISTEN 472/master tcp6 0 0 [::]:8009 [::]:* LISTEN 1074/java tcp6 0 0 [::]:3213 [::]:* LISTEN 276/sshd tcp6 0 0 [::]:http-alt [::]:* LISTEN 1074/java tcp6 0 0 [::]:http [::]:* LISTEN 520/apache2

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• can't connect to vsftpd from outside network

  - by rick

  i know this has been asked many times before, but nothing seems to resolve my issue. i have vsftpd running on ubuntu 10.04. i can connect with ftp localhost on the machine. i can connect from another machine in my network. i just cannot connect from outside. the machine is behind an airport extreme managed by airport utility on a mac. 21 is open as per nmap: macmini:~$ nmap localhost Starting Nmap 5.21 ( http://nmap.org ) at 2011-04-10 23:49 EDT Nmap scan report for localhost (127.0.0.1) Host is up (0.00045s latency). Hostname localhost resolves to 2 IPs. Only scanned 127.0.0.1 rDNS record for 127.0.0.1: localhost.localdomain Not shown: 997 closed ports PORT STATE SERVICE 21/tcp open ftp 22/tcp open ssh 631/tcp open ipp netstat says 21 is listening: macmini:~$ netstat -lep --tcp | grep ftp (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) tcp 0 0 *:ftp *:* LISTEN iptables: macmini:~$ sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination when i try to connect from my external IP (or a dyndns name which resolves there) it times out. ("control connection timed out") as i know very little about networking, i feel like something may jump out as clearly wrong?

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• How do I recover from a grub renaming issue?

  - by Justin Ardini

  I am currently dual-booting Ubuntu 10.04 and Windows 7 with grub 1.98 as the bootloader. I recently decided to edit the grub menu to remove the old Ubuntu kernels, so I followed the instructions of this guide and added the line list='version_find_latest $list' to the 10_linux file, then ran sudo update-grub. Apparently I made a mistake, because upon restart I had these bootloader entries: Ubuntu, with Linux $list Ubuntu, with Linux $list (recovery mode) Ubuntu, with Linux version_find_latest Ubuntu, with Linux version_find_latest (recovery mode) When I try to load any of these, I get a grub error along the lines of, Error: not a normal file Now I can't start any version of Ubuntu to remove the line I added. What's the best course of action to be able to use Ubuntu again? Thanks.

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• MySQL open files limit

  - by Brian

  This question is similar to set open_files_limit, but there was no good answer. I need to increase my table_open_cache, but first I need to increase the open_files_limit. I set the option in /etc/mysql/my.cnf: open-files-limit = 8192 This worked fine in my previous install (Ubuntu 8.04), but now in Ubuntu 10.04, when I start the server up, open_files_limit is reported to be 1710. That seems like a pretty random number for the limit to be clipped to. Anyway, I tried getting around it by adding a line like this in /etc/security/limits.conf: mysql hard nofile 8192 I also tried adding this to the pre-start script in mysql's upstart config (/etc/init/mysql.conf): ulimit -n 8192 Obviously neither of those things worked. So where is the hoop that has been added between Ubuntu 8.04 and 10.04 through which I must jump in order to actually increase the open files limit?

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• My VPS host (rosehosting) sold me a domain name, but I can't get it to work

  - by Faisal Vali

  My VPS host (rosehosting) sold me a domain name, but I can’t get it to work. They sent me an email with the following (almost a month ago) DNS Servers (unless you ordered your own DNS servers): ns1.rosehosting.com (216.114.78.148) ns2.rosehosting.com (216.114.78.155) Operating System: Ubuntu 9.04 Domain Name: mytestdomainfv.com Host Name: mytestdomainfv.com IP Address: .... Physical Host Name: Vs####.rosehosting.com When I type in the Physical Host Name or the IP from a remote computer I get connected to my VPS. But when i type 'mytestdomainfv.com' the name is never resolved, and it has been a month now. I thought that they would configure it so that it would, but it seems that they haven't. Does anyone know how I can get 'mytestdomainfv.com' to point to my VPS? I looked at some of the other similar questions, but they talk about forwarding GoDaddy domain names - so I'm not sure if it applies - but then again, it might just be my naivete. Any direction will be greatly appreciated. Thanks! p.s mytestdomainfv.com is not the real domain name

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• Wireless disconnects at random after upgrade to Ubuntu 10.4

  - by Daniel Elessedil Kjeserud

  After upgrading my home server from Ubuntu 8.10 to 10.4 my wireless seemingly drops out, even though my IRC client keeps it's connection to the servers, so it looks like the machine just stops taking wireless requests. A ping will give a me this Request timeout for icmp_seq 27 ping: sendto: Host is down After a while the machine just starts responding again, without any interaction from me. When the machine comes back, this is what dmesg gives me [ 18.296288] wlan0: direct probe to AP 00:1b:63:22:a4:5f (try 1) [ 18.296350] wlan0: deauthenticating from 00:1b:63:22:a4:5f by local choice (reason=3) [ 18.296440] wlan0: direct probe to AP 00:1b:63:22:a4:5f (try 1) [ 18.298697] wlan0: direct probe responded [ 18.298706] wlan0: authenticate with AP 00:1b:63:22:a4:5f (try 1) [ 18.306836] wlan0: authenticated [ 18.306886] wlan0: associate with AP 00:1b:63:22:a4:5f (try 1) [ 18.309396] wlan0: RX AssocResp from 00:1b:63:22:a4:5f (capab=0x411 status=0 aid=2) [ 18.309402] wlan0: associated [ 18.310187] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 18.447742] apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) [ 18.447748] apm: overridden by ACPI. [ 19.163282] padlock: VIA PadLock not detected. [ 28.352022] wlan0: no IPv6 routers present kjes@brin:~$ lspci 02:07.0 Network controller: RaLink RT2561/RT61 rev B 802.11g It's on a wireless network with WPA2, the machine worked without any problems on the same wireless network since Ubuntu 8.10 was the most resent version, and there have been no changes to my network recently. Even though the server drops out, everything else on the network keeps working like normal.

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• Disabling Keyboard Wakeup for Ubuntu 10.04 on Acer 1810TZ

  - by sybreon

  My Acer Aspire 1810TZ laptop suspends fine but wakes up on any slight key-press. I would like to disable this behaviour. I read that it involves disabling something in the /proc/acpi/wakeup but SLPB does not seem to be listed at all. root@1810TZ:/etc# cat /proc/acpi/wakeup Device S-state Status Sysfs node UHC0 S3 disabled pci:0000:00:1d.0 UHC1 S3 disabled pci:0000:00:1d.1 UHC2 S3 disabled pci:0000:00:1d.2 UHCR S3 disabled EHC1 S3 disabled pci:0000:00:1d.7 UHC3 S3 disabled pci:0000:00:1a.0 UHC4 S3 disabled UHC5 S3 disabled EHC2 S3 disabled pci:0000:00:1a.7 EXP1 S4 disabled pci:0000:00:1c.0 PXSX S4 disabled pci:0000:01:00.0 EXP2 S4 disabled PXSX S4 disabled EXP3 S4 disabled PXSX S4 disabled EXP4 S4 disabled pci:0000:00:1c.3 PXSX S4 disabled pci:0000:02:00.0 EXP5 S4 disabled PXSX S4 disabled EXP6 S4 disabled PXSX S4 disabled However, the relevant bits seem to be detected from dmesg. [ 0.357628] ACPI: AC Adapter [ACAD] (on-line) [ 0.357749] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0 [ 0.357754] ACPI: Power Button [PWRB] [ 0.357817] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1 [ 0.359319] ACPI: Lid Switch [LID0] [ 0.359390] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input2 [ 0.359394] ACPI: Sleep Button [SLPB] [ 0.359475] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input3 [ 0.359479] ACPI: Power Button [PWRF] Not quite sure what to do next.

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• Lucid Lynx login issue

  - by Bart Silverstrim

  Recently upgraded from Karmic to Lynx. Upgrade seemed to go well, no noticeable issues. I logged in, and my window manager wasn't starting. An application would appear, but sans control buttons and border, so figured the windows manager needed to be given a swift kick. Opened a web browser and a quick google had me run "metacity --replace &" and everything popped up. I re-ran the Compiz configuration tool to enable my rotating desktop cube to the way I liked it, and had to reconfigure my desktop switcher to the right number of desktops (although the first time I ran it, it crashed on the panel and reloaded...odd, but once it relaunched it seemed fine.) Today I installed updates, rebooted and logged in for the second time since my upgrade. Again, the window manager was dead, and my compiz settings were gone, and the workspaces were set back to four (and when I clicked on the preferences to change them, it crashed on the panel and reloaded again). Resetting everything made things look somewhat normal again. I'm guessing it'll work until I reboot again. Googling around isn't turning up similar complaints about Lucid Lynx and the window manager. Before I go deleting preference files, anyone else know of this kind of issue and what could be done about it? Or should I start taking the stab in the dark approach of deleting preference files hoping one of them is corrupt or has something unsupported in it that's throwing LL for a loop?

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• No login prompt displayed after updating Ubuntu 10.04, broken gdm

  - by cliff

  So here's what happens: I updated my system the other day, was prompted for a reboot for the update to complete but was in the middle of working so I delayed it until after I was done. I reboot and it's broken :(. It appears to boot normally, with the following exceptions: The purple Ubuntu load screen no longer displays (though it did for the first couple of times I tried to get in). I hear the login prompt sound, but no login prompt appears. Nor is it simply "invisible" - pressing enter, typing my password, and pressing enter again do nothing. Normally my Bluetooth mouse is functional at this point, but it is not. GRUB displays recovery options for my current kernel, and for an older one (2.6.32-24). Trying to boot into .32-24 gives me an error saying "udevadm can't do something while udev is not configured". So I try solutions listed here: http://superuser.com/questions/195786/ubuntu-update-went-wrong-pc-doesnt-boot-how-can-i-repair-it Nothing I tried seemed to work, and after further Googling my hunch is that it's a problem with gdm. Please correct me if I'm wrong, I don't know all that much about how Linux/Ubuntu systems work just yet. Things I'm able to do: Boot to a live CD Ctrl-Alt-F2 after that login sound plays brings me to a console login, which I can successfully do (it's how I tried the solutions above). This works only under the current kernel. A hack I'd be willing to explore is removing the login prompt from the console, but I'd prefer to "simply" fix what's wrong. Like that guy, I need to repair the system rather than reinstall. System: Dell Inspiron 1525 Core 2 Duo Proprietary Driver for Broadcom 43xx wireless Dual-boot with Windows 7 (which is how I'm posting this, unfortunately I only have this machine and any experimenting requires constant reboots into Windows/brokenbuntu) Last package installed was Moonlight, but it appeared to install properly. Kernel: 2.6.32-25 Edit: After working with Karl's suggestions, it seems that the problem is with gdm. Error exit status 245 when attempting to sudo apt-get install --reinstall gdm, also an error processing gdm when running sudo apt-get -f install. How do I reinstall or repair gdm so that I can get back into my machine?

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• PureFTPd : ChrootEveryone not working

  - by Mistha Noobstha

  I have a fresh install of Ubuntu 12.04 with pure-ftpd version 1.0.35-1. I don't use database for the only user I have (ftpuser1 - localuser), but I want to lock him into his home directory. /ftp/ftpuser1 is the home dir of ftpuser1. /etc/pure-ftpd/conf/ChrootEveryone has the yes string and in /etc/default/pure-ftpd-common VIRTUALCHROOT is set to false, but ftpuser1 can freely walk around. My startup line for pure-ftpd looks like this : /usr/sbin/pure-ftpd -l pam -A -8 UTF-8 -O clf:/var/log/pure-ftpd/transfer.log -u 1000 -E -B So there is the "-A" in it for the ChrootEveryone.

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• How to Uninstall cPanel from Ubuntu?

  - by Shankar Menon

  Hi is there any way I can remove cPanel from my ubuntu installation? Any scripts for this purpose?

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• How do boot sectors and multiple drives works?

  - by GiH

  I don't fully understand the concept of a boot sector, I was hoping someone could clear this up for me. If you have two hard drives, with an OS installed on each, does each drive have its own boot sector? Does each drive need an MBR partition? I've got Linux and Windows on two separate drives. I've had issues when installing Linux and grub, and now I've finally decided to use the Windows bootloader to start up. Would Windows have gotten rid of grub when i used /fixmbr or does it stay there on the boot sector of the other drive?

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• How can I perform a controlled shutdown of a virtualbox guest using VBoxManage?

  - by Bryan

  I'm currently testing Ubuntu 10.04, and have install the VirtualBox software. I have also installed Ubuntu 10.04 as a VirtualBox guest running on the host system. I've installed the VirtualBox Utils into the guest OS, as follows: sudo apt-get install virtualbox-ose-guest-utils What I want to be able to do is to initiate a controlled shutdown of the guest, from the host system using the VBoxManage command. I first tried this command: VBoxManage controlvm guest poweroff which worked, but didn't initiate a controlled shutdown, it effectively pulls the plug on the guest. I've since found that this command should do the trick: VBoxManage controlvm guest acpipowerbutton but this doesn't appear to do anything. Can anyone tell me what I'm doing wrong? p.s. I don't want to use SSH & Certificates to do this, as I'm also going to be running Windows guests, and I want the solution to work for all guests.

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• Ubuntu upgrade process failed

  - by Spin0us

  I tried to dist-upgrade my ubuntu server on my percona cluster but it failed with this message The following packages have unmet dependencies: libmysqlclient18 : Depends: libmariadbclient18 (= 5.5.33a+maria-1~precise) but it is not installable And here is the package listing # dpkg --list | grep -E 'percona|mysql' ii libdbd-mysql-perl 4.020-1build2 Perl5 database interface to the MySQL database iU libmysqlclient18 5.5.33a+maria-1~precise Virtual package to satisfy external depends ii mariadb-common 5.5.33a+maria-1~precise MariaDB database common files (e.g. /etc/mysql/conf.d/mariadb.cnf) ii percona-xtrabackup 2.1.5-680-1.precise Open source backup tool for InnoDB and XtraDB ii percona-xtradb-cluster-client-5.5 5.5.31-23.7.5-438.precise Percona Server database client binaries ii percona-xtradb-cluster-common-5.5 5.5.33-23.7.6-496.precise Percona Server database common files (e.g. /etc/mysql/my.cnf) ii percona-xtradb-cluster-galera-2.x 157.precise Galera components of Percona XtraDB Cluster ii percona-xtradb-cluster-server-5.5 5.5.31-23.7.5-438.precise Percona Server database server binaries ii php5-mysql 5.3.10-1ubuntu3.8 MySQL module for php5 During the install of the server, mariadb and galera cluster have first been installed. Then removed to be replaced by percona XtraDBCluster. So i think this is the source of the problem. But how can i resolve this without reinstalling all ? UPDATE 1 # apt-cache policy libmariadbclient18 libmariadbclient18: Installed: (none) Candidate: (none) Version table: 5.5.32+maria-1~precise 0 100 /var/lib/dpkg/status

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• Why aren't Heroku syslog drains logging to rsyslogd?

  - by Benjamin Oakes

  I'm having a problem using syslog drains as described in https://devcenter.heroku.com/articles/logging. To summarize, I have an Ubuntu 10.04 instance on EC2 that is running rsyslogd. I've also set up the security groups as they describe, and added a syslog drain using a command like heroku drains:add syslog://host1.example.com:514. I can send messages from the Heroku console to my rsyslogd instance via nc. I see them appear in the log file, so I know there isn't a firewall/security group issue.  However, Heroku does not seem to be forwarding log messages to the server that heroku drains lists. I would expect to see HTTP requests, Rails messages, etc. Is there something else I can try to figure this out? I'm new to rsyslogd, so I could easily be missing something.

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• Install a KVM guest with LVM partitioning on an LVM partitioned host using virt-install fails, volume group already exists

  - by Rilik84

  our setup consists of a ubuntu 10.04 kvm host server with LVM, on top of which we install the ubuntu 10.04 virtual machines via virt-install and preseed. Each VM has a dedicated logical volume which we pass to virt-install via the "--disk path=/dev/sysvg/vm-name" parameter. The virtual machines themselves are using LVM as well. Virt-install seems to have a few issues with this setup. Say we want to install two virtual machines in parallel. The first vm installs correctly while the second halts during the partitioning, complaining with this error: "volume group name already in use". I tried removing the logical volumes, recreated them, rebooted the kvm host to clear any leftovers but the issue perists. The preseed is telling the vms to create a volume group named "sysvg", which is the same name used by the volume group of the kvm host. Considering this I did another test: I got rid of the preseed part taking care of the partitioning/lvm creation and started the creation of two vms in parallel. If, when prompted, I instruct the vms' installer to do a guided partitioning of the disk with LVM, it will still fail giving this different error on both the vms: Physical Volume /dev/sda5 is already in volume group sysvg. As I wrote, sysvg is the volume group used by the KVM host. So I thought the name clashing was the issue. By removing the preseed part I skipped the volume group naming. I can't understand how the virtual machines would be aware of the presence of that volume group since they're supposed to be isolated from it, especially after I removed and recreated the logical volumes dedicated to them. That detail should not be exposed at all to them! Thanks for the help. I'm clueless.

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• Disable WLan if Wired/Cable Network is available

  - by ifischer

  The question says it all. All i want is that my W-Lan connection should be disabled whenever a wired connection is available. What would be the easiest way to do that in Ubuntu/Gnome? In all guides (for instance some about guessnet) i found i had to configure my whole network configuration (WPA keys, DHCP, ...), but i find that a bit too complicated for such a simple use case. I just want to disable wlan0 when eth0 is connected.

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• DVD won't play in Ubuntu Jaunty after codes and css support has been added.

  - by C. Ross

  Using Totem Video Player v2.26.1 on Ubuntu Jaunty 9.04, dvd's won't play after I've installed libdvdread4, added the Medibuntu packages, and run sudo /usr/share/doc/libdvdread4/install-css.sh If I click on the dvd I get an error *"Could not read from resource". If I navigate to one of the videos directly and run it, the movie will play, but with obvious degradation or encryption (like cable tv you aren't paying for).

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• Mount /tmp in /mnt on EC2

  - by Claudio Poli

  I was wondering what is the best way to mount the /tmp endpoint in the ephemeral storage /mnt on an EC2 instance and give the ubuntu user default write permissions. Some suggest editing /etc/rc.local this way: mkdir -p /mnt/tmp && mount --bind -o nobootwait /mnt/tmp /tmp However that doesn't work for me. I tried editing the fstab: /dev/xvdb /tmp auto defaults,nobootwait,comment=cloudconfig 0 2 and giving it a umask=0777, however it doesn't work because of cloudconfig. I'm using Ubuntu 12.04.

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• continuous hard disk access - slowing down my machine

  - by suresh

  I find from the hard disk access LED on the front of my machine that the hard disk is being accessed more often and probably because of that, my machine is quite slow. The machine becomes unresponsive even when the load as seen from w command is around 1 or so. My desktop is optiplex 360 dell machine running Ubuntu 10.04. My questions are: How to quantify hard disk access and how to see if it is more than "normal" ? If it is more than normal, what are my solutions ? thanks suresh

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• apache2 vhost error

  - by user7832

  the error says: Virtualhost mysite.com has no server environment set, request will not be honoured my vhost file is: <VirtualHost *:80> ServerName mysite.com ServerAdmin [email protected] DocumentRoot "/srv/d_servpa1/www/mysite.com/htdocs" <Directory "/srv/d_servpa1/www/mysite.com/htdocs"> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny Allow from all </Directory> ErrorLog /srv/d_servpa1/www/mysite.com/htdocs/error.log </VirtualHost> cant see why this isnt working

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• Deep freeze alternative for Ubuntu

  - by Nrew

  I made some research and found out that Deep freeze is not available for ubuntu. Is there a software like deep freeze for Ubuntu 10.04. To prevent writing data on the disk. I need this so that I could try all sorts of stuff on Ubuntu without worrying if I could damage the Windows installation that is installed along side with it. Virtual box is good. But the performance is not. Because I only have 2gb of ram.

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