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Run a script at shutdown

ubuntu-logo-smQ: I would like to run a script at system shutdown, how do I do that?

A: The best way to do so, is to add it to the /etc/init.d directory and link it to rc0 and rc6 (reboot and shutdown). Here's a sample script:

Tuesday, 27 May 2014 14:13
 

"550 5.1.1 User unknown" Error when Sending to a Distribution Group

Ifexchange2010 you receive an error when sending to a newly created distribution group: "550 5.1.1 User unknown", you have to take the following steps to resolve it:

Monday, 03 March 2014 10:58
   

Create an empty test file in Linux

Q. How can I create an empty test file? 

A. There are several ways, including dd command, but this one is the quickest: 

fallocate -l 10G test.file

Monday, 28 October 2013 14:24
   

Specify search domains for Windows DNS

Q. I've added a server to the DNS, but when I do an NS lookup it doesn't show up, unless a fully qualified domain name (FQDN) is used. How can I fix this.

A. There are many ways to fix this.

1) Quickest way is to add the host to your hosts file:

Edit C:\Windows\system32\drivers\etc\hosts file and add at the bottom:

10.10.10.11    servername

This however, leads to a lot of manual work if you want to do it on an organizational level, so the second method is probably better:

Wednesday, 23 October 2013 14:23
   

Volume indicator not working after xubuntu 13.10 upgrade

xubuntu-logo-icon-largeQ. My volume indicator is broken after the upgrade to Xubuntu 13.10. The sound still works.

 

A. This is a known bug, but can be easily fixed:

 

In a terminal window, run: 

sudo nano /usr/share/dbus-1/services/indicator-sound.service

Modify the line:

Exec=/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service

to 

Exec=/usr/lib/indicator-sound-gtk2/indicator-sound-service

Friday, 18 October 2013 13:00
   

Force Linux reboot

This happens quite often - a file-system hangs and doesn't respond to "reboot" commands. Here's how to force it to restart - on the command line, type the following:

echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger

Thursday, 03 October 2013 19:44
   

How to install wallpapers from older ubuntu releases?

ubuntu-logoQ. I would like to install wallpapers from older releases of Ubuntu, how do I go about doing so?

 

A. The process is simple. You can run the following command on the terminal:

 

sudo apt-get install ubuntu-wallpapers-quetzal

Depending on the version you have (and wallpapers you'd like), replace quetzal with one of the following previous versions:

Tuesday, 01 October 2013 10:34
   

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