So, how do you fix this problem? You create multiple accounts on the Linux EC2 instance and generate keys for every individual accounts, here is how you do it:

Step 0. Login by default user, “ec2-user”:

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static-9:ec2_thelostlogbook utkarsh$ ssh -i my_key.pem ec2-user@111.111.11.111

Step 1. Create a new user, we will call our new user “john”:

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[ec2-user@ip-11-111-111-111 ~]$ sudo adduser john

Set password for “john” by:

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[ec2-user@ip-11-111-111-111 ~]$ sudo su
[root@ip-11-111-111-111 ec2-user]$ passwd john

Add “john” to sudoer’s list by:

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[root@ip-11-111-111-111 ec2-user]$ visudo

and add this to the last line:

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john   ALL = (ALL)    ALL

Alright! We have our new user created, now you need to generate the key file which will be needed to login, like we have my_key.pem in Step 0.

Now, exit and go back to ec2-user, out of root.

Step 2. Creating the public and private keys:

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[ec2-user@ip-11-111-111-111 ~]$ su john

Enter the password you created for “john” in Step 1.

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[john@ip-11-111-111-111 ec2-user]$ cd /home/john/
[john@ip-11-111-111-111 ~]$ ssh-keygen -b 1024 -f john -t dsa
[john@ip-11-111-111-111 ~]$ mkdir .ssh
[john@ip-11-111-111-111 ~]$ chmod 700 .ssh
[john@ip-11-111-111-111 ~]$ cat john.pub > .ssh/authorized_keys
[john@ip-11-111-111-111 ~]$ chmod 600 .ssh/authorized_keys
[john@ip-11-111-111-111 ~]$ sudo chown john:ec2-user .ssh

In the above step, john is the user we created and ec2-user is the default user group.

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[john@ip-11-111-111-111 ~]$ sudo chown john:ec2-user .ssh/authorized_keys

Step 3. Now you just need to download the key called “john”

I use scp to download/upload files from EC2, here is how you can do it:

You will still need to copy the file using ec2-user, since you only have the key for that user name. So, you will need to move the key to ec2-user folder and chmod it to 777.

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[john@ip-11-111-111-111 ~]$ sudo cp john /home/ec2-user/
[john@ip-11-111-111-111 ~]$ sudo chmod 777 /home/ec2-user/john

Now come to local machine’s terminal, where you have my_key.pem file and do this:

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static-9:ec2_thelostlogbook utkarsh$ scp -i my_key.pem ec2-user@111.111.11.111:/home/ec2-user/john john

The above command will copy the key “john” to the present working directory on your local machine. Once you have copied the key to your local machine, you should delete “/home/ec2-user/john”, since it’s a private key.

Now, one your local machine chmod john to 600.

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static-9:ec2_thelostlogbook utkarsh$ chmod 600 john

Step 4. Time to test your key:

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static-9:ec2_thelostlogbook utkarsh$ ssh -i john john@111.111.11.111

So, in this manner, you can setup multiple users to use one EC2 instance!!

PS: Please post your comments if you find any error.

The problem is, if you copy some text from a file and you close that file (i.e. close the source), the copied text also disappears! Initially I ignored the problem, but after a while, I had it! It was really very annoying if you copied some important link and you close Firefox, the link was lost!

When I went out and searched for the problem then I found this, the actual bug report on the Ubuntu Bug Tracker. According to the Canonical guys, it is a system feature of the X-Windows System, as per its design, it does not have any persistent store mechanism and that sucks! (Here are the X-windows Clipboard manager specifications which is presently deployed on Ubuntu 9.10)

That means, the primary problem is with the X-Windows System and I hope this flaw is sorted out in Ubuntu’s next LTS release, The Lucid Lynx.

So the question is, how do you solve this problem for now?! I have the solution :)

The solution to this problem is to install Glipper, a clipboard manager for GNOME. You can simple install it from the terminal:

sudo apt-get install glipper

This will replace your current clipboard manager and it works perfectly!

So, that will solve your problem of the missing copy in Ubuntu GNOME! ;)

What is iCalendar?

XML or iCalendar – Use these formats to view a read-only version of your calendar from other applications. You can use this address to access your calendar from feed readers (like Google Reader) as well as products that support the iCalendar format (like Apple’s iCal). via Google Support

1. Go to your Google Calendar and select the down arrow with calendar you want to sync with GNOME and select Calendar Setting

2. Copy the link of the Green button, iCal next to Private Address.

3. Now, open the linux Terminal and type the following:

/usr/lib/evolution-webcal/evolution-webcal URL_YOU_COPIED

That’s it! You will see an appointments option under the GNOME clock.

via Bryan Clark

]]> http://utkarshsengar.com/2009/11/google-calendar-with-gnome-clock/feed/ 7 http://utkarshsengar.com/2009/11/run-jms-application-using-jboss-4-2-3-on-eclipse-ganymede-on-ubuntu-9-10/ http://utkarshsengar.com/2009/11/run-jms-application-using-jboss-4-2-3-on-eclipse-ganymede-on-ubuntu-9-10/#comments Fri, 06 Nov 2009 22:20:37 +0000 Utkarsh http://utkarshsengar.com/?p=43 If you a windows “power” user, a shift to linux will be really good, but it also comes with little packages of frustration sometimes.

I was trying to install JBOSS 4.3.2 (which was very smooth) and trying to run a JMS application. This is a very easy task in Windows, but since, I am new to linux, some easy tasks became so annoying!!! But later I realized it was much simpler once you get the hang of it. So, here are the steps to run a JMS application on Linux (Ubuntu 9.10)

1. Install JBOSS 4.3.2

Download JBOSS 4.3.2 to your desktop and extract the tar.gz or zip file ot /opt folder in the main file system.

“sudo unzip boss-4.2.3.GA-jdk6.zip /opt“

And you are done with your JBOSS installation!!

Go to your terminal and type “sudo /opt/jboss-4.2.3.GA/bin/run.sh“. This will start you JBOSS server in 20-25 seconds.

2. Configure the environment variable in linux

This was the most annoying part for me since I didn’t know how to set the environment variable in Linux. Though its a very very easy process!

Execute this following code in the terminal:

export CLASSPATH=$CLASSPATH:/CLASSPATH=/opt/jboss-4.2.3.GA/client/jbossall-client.jar
To check if you have set the CLASSPATH correctly, type echo $CLASSPATH and if you see the following, you see this, you have set your classpath correctly!

:/CLASSPATH=/opt/jboss-4.2.3.GA/client/jbossall-client.jar

3. Configure your JMS code (more example) (depends on your code)

Go to Eclipse IDE and import your JMS Code. The most simple code should contain 2 files, a client and a server. Then right click on the project > Build Path > Add External Archives; then browse to the folder where you installed JBOSS, (/opt/jboss-4.2.3.GA/) in our case and then go to client folder and add jbossall-client.jar

/opt/jboss-4.2.3.GA/client/jbossall-client.jar

You are all set to run your first JMS application!

You need to create a topic or queue to run the server, for this start the JBOSS server using:

sudo /opt/jboss-4.2.3.GA/bin/run.sh

1. Go to http://localhost:8080 in your browser.
2. Go to JMX console
3. Scroll down to jboss.mq and click on service=DestinationManager
4. Scroll down to  createTopic() method; type in the topic name you want to create and click “invoke”

4. Integrate JBOSS with Eclipse Ganymede using JBOSS Tools (optional)

If you want to start and stop the JBOSS server from your Eclipse installation then add the JBOSS Tools to eclipse in Help > Software Updates. You can follow the steps given in this tutorial.

UPDATE: Rhythmbox works out of of the box with iPod, check here

I tried many softwares; the so called iTunes alternatives, but none of them actually work!

The one guaranteed way to sync iPod with iTunes on Linux (Ubuntu 9.10, 32bit) is by using VirtualBox and tweaking your Linux box.

What I am using?

1. Ubuntu 9.10, 32bit
2. Virtual Box 3.0.10
3. Windows Server 2003 (You can also use Windows XP SP2, I haven’t testing it, but it should work.)
4. iTouch 2nd Gen with iTouch OS 3.1

This tutorial guides through the complete process, its simple and easy, but this tutorial is for old versions of VB and Ubuntu. You don’t need to follow the last few stages of the guide. SO, the revised stages are:

1. Install Virtualbox

2. Configure the USB support

3. You don’t need to recompile the kernel USB support as mentioned in the tutorial.

4. Connect iPod Touch to Windows XP VM

And you are done, if everything goes well, you will be able to see you iPod in your iTunes.

UPDATE – WITHOUT USING VIRTUAL BOX

Linux and Your iPhone / iPod Touch using iFush and libiphone-utils libraries.