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  • Running psql in Linux Command Line

    - by Mr Shoubs
    I've just installed Postgres9 and it is up and running without any issues. There is one thing however that is confusing me: If I type /usr/local/pgsql/bin/psql test then postgres command line loads and I can use it as expected, however... If I cd /usr/local/pgsql/bin then type psql test I get the following error: The program 'psql' is currently not installed. To run 'psql' please ask your administrator to install the package 'postgresql-client-common' Does anyone know why? (please don't say install postgresql-client-common as this doesn't solve the problem)

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  • df -h showing wrong output in GB

    - by Anurag Uniyal
    If I list df output for KB, MB and GB, they do not match e.g. $ df -k |grep xvdb /dev/xvdb1 12796048 732812 11413172 7% /xxx $ df -m |grep xvdb /dev/xvdb1 12497 716 11146 7% /xxx $ df -h |grep xvdb /dev/xvdb1 13G 716M 11G 7% /xxx 12796048 KB = 12496.14 MB so that is slight off but OK 12796048 KB = 12.2 GB, 12407 MB is also 12.2 GB so why df is showing 13 GB or am I missing something? Here is full df listing $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 7.5G 1.7G 5.5G 24% / none 5.8G 128K 5.8G 1% /dev none 5.8G 0 5.8G 0% /dev/shm none 5.8G 44K 5.8G 1% /var/run none 5.8G 0 5.8G 0% /var/lock none 5.8G 0 5.8G 0% /lib/init/rw /dev/xvdb1 13G 716M 11G 6% /xxx Coreutils version seems to 7.4 as info coreutils shows This manual documents version 7.4 of the GNU core utilities,

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  • How to lock screen in linux before hibernating?

    - by Emanuel Ey
    So when i hibernate my laptop the screen doesn't lock automatically. To solve this i've changed /etc/acpi/powerbtn.sh to contain: su - myUsername -c "gnome-screensaver-command -l" sudo pm-hibernate exit 0 When running this file from a command line it works as intended (ie, lock the screen and then hibernate). Unfortunately, when pressing the power button, it still just hibernates without locking the screen -what am I missing? EDIT: I've added the line whoami>>~/Desktop/test.txt to verify which user is executing the /etc/acpi/powerbtn.shscript. When pressing the power button, the file test.txt is created, but is empty. From this i conclude that the script is in fact being called when pressing the power button. What i do not understand is how the output of whoami can be empty...

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  • Why isn't "(ulimit -d 1000; firefox) &" working?

    - by MaxB
    I'm trying to limit the memory usage of firefox to prevent it from stalling the whole system with problematic web sites. I tried, in bash: (ulimit -d 1000; firefox) & This should limit the memory usage to 1000kB. Then I opened YouTube, and noticed, in top, that firefox is using 2.6% of the memory, or about 200MB, and not crashing. Clearly the limit is being ignored. Why is that, and how can I enforce it correctly?

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  • Creating java package on ubuntu?

    - by Gaurav_Java
    I am new to java. Here I am trying to create java package. And try to compile it from another directory . But there is an error like bash: /home/gaurav/Desktop/package2/B.java: Permission denied Here is fy first code and directory is /home/Desktop/package/A.java package package1; public class A { interface A1 { void show(); void display(); } } class B extends A { public void show() { System.out.println("This is show method()"); } public void display() { System.out.println("this is Display metthod()"); } } For compilation I did this command it's works fine. pwd is /home/gaurav javac /home/gaurav/Desktop/package/A.java When I try to compile B.java which is in my Other drive /media/gaurav/iPlay/package/B.java package package2; class B { public static void main(String args[]) { System.out.println("Reached in Main method of B"); package1.A Object = new A(); } } I tired this vommand (grom previous working directory) javac -cp /home/gaurav/Desktop/;/media/gaurav/iPlay/package/B.java Error Comes javac -cp /home/gaurav/Desktop/;/media/gaurav/iPlay/package/B.java javac: no source files Usage: javac <options> <source files> use -help for a list of possible options bash: /media/gaurav/iPlay/package/B.java: Permission denied What i am doing wrong? Please it my assignment I am not able to move further without this. I changed permissions.

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  • How can I prevent ubuntu from mounting particular partitions/deivices?

    - by Patryk
    I would like to stop Ubuntu from mounting my other (Windows') partitions automatically (since I do not need it really often - and especially I would like not to automount "System reserved" partition for Windows. There is a similar question here How can I stop Ubuntu 12.04 from mounting Fedora 16's Swap Partition? but! I do not have these partitions added in /etc/fstab. How can I do it ? For proof, my /etc/fstab proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda7 during installation UUID=1384cee0-6a71-4b83-b0d3-1338db925168 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda6 during installation UUID=e3729117-b936-4c1d-9883-aee73dab6729 none swap sw 0 0 #------ MY WINDOWS D DRIVE---------- I WANT TO KEP IT UUID=98E8B14DE8B12A80 /media/d ntfs defaults,errors=remount-ro 0 0

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  • Configuring sudo to work without password

    - by aidan
    I'm trying to configure sudo to allow all users to restart apache without having to enter a password. Security concerns aside, why isn't this working? I added the line to /etc/sudoers: %admin ALL=NOPASSWD: /usr/sbin/apache2ctl $sudo -l User aidan may run the following commands on this host: (root) NOPASSWD: /usr/sbin/apache2ctl (ALL) ALL $sudo /usr/sbin/apache2ctl [sudo] password for aidan: Thanks for any help.

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  • How can I find the USB wireless adapter into the dmesg log file?

    - by AndreaNobili
    I am pretty new in Linux (RaspBian for RaspBerry Pi but I think that there are not difference) and I have to install an USB wireless network adapter (the product is the TP-Link TL-WN725N, this one: http://www.tp-link.it/products/details/?model=TL-WN725N ) Now, I think that this is not automatically recognized by my system because if I execute ifconfig command I obtain the following output: pi@raspberrypi ~ $ ifconfig eth0 Link encap:Ethernet HWaddr b8:27:eb:2a:9f:b0 inet addr:192.168.1.8 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:475 errors:0 dropped:0 overruns:0 frame:0 TX packets:424 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:34195 (33.3 KiB) TX bytes:89578 (87.4 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) So now it see only my ethernet network interface and not the wireless. So I was thinkig to try to see into the dmesg, but I don't know what have I to see and how to select it into the dmesg output. For example by the following command I can see the line of the dmesg log file relate to my ethernet port: pi@raspberrypi ~ $ cat /var/log/dmesg |grep -i eth [ 3.177620] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-bcm2708_usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:2a:9f:b0 [ 18.030389] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup [ 19.642167] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 But what can I try to search for the USB wireless adapter? Tnx

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  • MySQL Master-Master replication generating thousands of log files

    - by Andrew
    Today, I checked the /var/lib/mysql/ directory of a server in a master-master replication setup and noticed there were about 3,600 slave-relay.00xxxx files in there (where "xxxx" is an incrementing integer). They appear to be binary log files and don't take up much space (only about 42K), but are they an indication that something is wrong? They range in date from August until today with about 25 per day. Thanks for any help.

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  • How do I install gcc 4.8.1 on Ubuntu 13.04?

    - by sud_the_devil
    I have a 64 bit UBUNTU 13.04 running gcc --version shows me gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3 But on May 31 2013 gcc 4.8.1 was released . And I don't know how to install it .. Can someone please explain me the steps that I need to do for successfull installation .. Also please tell me whether I can have both the instances of gcc installed i.e 4.7.3 & 4.8. 1 or not ?? And after installation how can I point to the new gcc 4.8.1 ??

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  • How do I enable greedy MigrationHeuristic in Karmic?

    - by Matthew
    My laptop performs very poorly for 2d graphics. For example, Docky's zoom effect and compiz effects are very choppy. In Jaunty, I was able to fix this by adding the following line under the "Device" section in my xorg.conf: Option "MigrationHeuristic" "greedy" In Karmic, there is no xorg.conf by default, so I copied my old one (from Jaunty). However, everything is still slow. Here is my xorg.conf: Section "Device" Identifier "Configured Video Device" Option "MigrationHeuristic" "greedy" EndSection Section "Monitor" Identifier "Configured Monitor" EndSection Section "Screen" Identifier "Default Screen" Monitor "Configured Monitor" Device "Configured Video Device" EndSection From googling about, it sounds like "MigrationHeuristic" is only an option for the "EXA" mode, while Karmic has switched the intel driver to "UXA". So I tried adding this line under the "Device" section: Option "AccelMethod" "exa" But this didn't help.

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  • Ubuntu on a netbook. Wait for 12.10?

    - by Kevin Duke
    My friend has a really slow 2 yr old Toshiba netbook with 1GB of RAM. She is annoyed how slow Windows Starter runs on it so I suggested switching to Ubuntu. Since 12.10 is due in a few days, I'm not sure if we should wait before installing Ubuntu or if we should install it now in order to use Unity 2D. For a low-end device, should we use Unity 2D or use Unity 3D on 12.10 since Unity 2D is no longer present in 12.10? I understand Unity 3D has been greatly improved but is it faster than Unity 2D in the LTS version for a low-spec'd device?

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  • LS command for torrent files

    - by amir-beygi
    Hi all I have a directory full of torrent files,and i have to download all of them; But the problem is i have disk limit in my remote server,and file sizes are vary(100MB~8GB) and if i add all of torrent files ,none of them would be download completely;So i need a command to list all my torrents and the size of them , to be selected and add to download list later . NOTE: REMOTE SERVER - LINUX_UBUNTU_9.10 // SSH So i need a command like torrentls That output somethings like: file1.torrent 1111MB file2.torrent 222MB file3.torrent 3333MB file4.torrent 444MB file5.torrent 5555MB

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  • sudo midnight commander

    - by mit
    I sometimes start midnight commander as superuser with the command sudo mc to do some operations on the current working directory as superuser. But this results in ~/.mc having the wrong permissions, which I need to fix manually. Any solution? Edit: I accepted an answer. I want to further add, that .mc is a directory, so my solution goes like this: $ cd ~ ~$ sudo chown -R mit.mit .mc ~$ chmod 775 .mc ~$ cd .mc ~$ chmod -R 664 .mc ~/.mc$ chmod 775 cedit It seems not to be a good idea after installing mc to use sudo on its first start .

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  • Debian based OS: Show system notification on clipboard copy/paste events

    - by ifischer
    When working with Linux (Debian based), I often experience problems in relation to the copy paste commands: I copy something with Ctrl+C or by selecting it with the mouse, but when I try to paste it somewhere else, the clipboard is empty and nothing happens - whatever reason caused this. This annoys me, as I have to switch to the source application again and again copy the text. So to really be sure if something was copied into the clipboard I would like it if the window manager (be it Gnome, KDE, etc) would show a Desktop Notification (for example powered by libnotify) as soon as anything is copied into the clipboard, showing the content that has been copied into the clipboard. Is that possible by using one of the many clipboard managers out there (glippy, clipit, ...)? If not, can I write a (DBus?)-hook, which is triggered during copy-to-clipboard-actions, showing the content which is to copy inside the Desktop Notification? (The latter approach would be more interesting, since I'm interested in hooking into system events in general)

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  • Puppet nodes cant' find master, ec2 public versus internal ip addresses and hosts files

    - by Blankman
    If I setup my hosts files such that they reference all other ec2 nodes using the internal ip addresses, will this work or do I have to use the external ip addresses? Do I need to specify anything in my security group to get internal ip addresses to work? e.g. /etc/hosts ip-10-11-12-13.internal some_node_name If I do this, can I reference some_node_name anywhere in my scripts where I would have used the ip address previously? On my puppet agent servers, I have a reference to my puppet master like: public-ip-here puppet When I reboot my puppet agent's, syslog shows they couldn't find the master with the message: getaddinfo : name or service not known I did get it to work by updating /etc/default/puppet and I added to the options: --server=public-ip-here From what I read, puppet will by default try using 'puppet', and I set this in my hosts file so why wouldn't it be picking this up?

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  • Install Adobe AIR on Ubuntu/Linux

    Since quite some time Adobe Technologies released the Linux version of Adobe AIR to bring web applications and widgets to your desktop. Installing new applications on a Linux system is not always as easy as switching the computer on. The following instructions might be helpful to install Adobe AIR on any Linux system. First of all, get the latest installer of Adobe AIR from http://get.adobe.com/air/ - as of writing this article the file name is AdobeAIRInstaller.bin. Save the download in your preferred folder. Now, there are two ways to run the installer - visual style or console style. Visual Installation Launch your favorite or standard file manager like thunar or nautilus and browse to the folder where the AdobeAIRInstaller.bin has been saved. Right click on the file and choose 'Properties' in the context menu Set 'Execute' permissions and confirm modifications with OK Rename file into AdobeAIRInstaller Double click and follow the instructions Using the console Open a terminal like xterm Change into the directory where you stored the download Run this command:[code]chmod +x AdobeAIRInstaller.bin[/code] Now run this command:[code]sudo ./AdobeAIRInstaller.bin[/code] The normal installer will open, install it. From now whenever you download a .air file, just double click it and it will be installed. Troubleshooting In case that the installation does not start properly, try to install via console. This gives you more details about the reasons. Should you run into something like this: [code]AdobeAIRInstaller.bin: 1: Syntax error: "(" unexpected[/code] Double check the execute permission of the installer file and try again.

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  • Amavisd start error

    - by Kristian
    I can't start amavis. It gives an error: Starting amavisd: Error in config file "/etc/amavis/conf.d/05-domain_id": Insecure directory in $ENV{PATH} while running with -T switch at /etc/amavis/conf.d/05-domain_id line 7. On line 7 is: chomp($mydomain = `head -n 1 /etc/mailname`); This problem occured after restaring my computer. I don't know much about amavis, so any help is appreciated. Regards, Kristian

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  • What is the kernel module "hid_microsoft"?

    - by Masi
    The lsmod-command shows the odd module. The command "modprobe -a hid_microsoft" does not reveal anything. What is it? $ modinfo hid_microsoft filename: /lib/modules/2.6.28-15-generic/kernel/drivers/hid/hid-microsoft.ko license: GPL srcversion: 3FE2E2F2EE89174E885204A alias: hid:b0005v0000045Ep00000701 alias: hid:b0003v0000045Ep0000009D alias: hid:b0003v0000045Ep00000713 alias: hid:b0003v0000045Ep000000F9 alias: hid:b0003v0000045Ep000000DB alias: hid:b0003v0000045Ep0000003B depends: vermagic: 2.6.28-15-generic SMP mod_unload modversions 586

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  • Auto-symlink contents of directory in my home directory?

    - by Nathaniel
    So I'm a dual-booter. I'm looking for an easy way to keep up-to-date symlinks in my Linux home folder pointing to every file and folder in the root of Windows personal directory. So, say I have foo.txt and bar.txt in C:\Windows\Documents and Settings\Nathaniel. I want symlinks of those files to automatically be made in /home/nathaniel/ (while I'm running Linux, of course).

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  • Rails app complaining can't connect to memcached but I'm pretty sure it's running

    - by centipedefarmer
    All was well, then I rebooted the server. Right now: $ ps aux | grep memcache 1000 27168 0.0 0.0 121972 1056 pts/0 Sl 15:18 0:00 memcached -m 64 -p 11211 -u nobody -l 127.0.0.1 1000 27816 0.0 0.0 7628 956 pts/0 S+ 15:36 0:00 grep memcache meanwhile the rails app's log is getting tons of this: MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:55 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011) MemCacheError (No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011)): No connection to server (localhost:11211 DEAD (Timeout::Error: execution expired), will retry at Tue Feb 15 15:35:56 -0600 2011) Being that I'm more of a developer than a server guy, and being that we don't really have a "server guy," and this being in production... where do I start with this?

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