Vinay's questions

I am working on my project using network simulator2. I installed it and everything is fine. I attempted to create a symbolic link between this installation and /usr/bin, so I could invoke the software by running ns from the command-line. Namely, I ran:

sudo ln -s /home/vinaychalluru/ns-allinone-2.34/ns-2.34/ns /usr/bin/ns

which generated the following output:

ln: creating symbolic link '/usr/bin/ns': File exists

How can I delete the already created symlink or can I replace it with any other commands?

I am using Ubuntu Lucid Lynx. I installed it using the feature 'Install within Windows'. I got a simple though difficult problem.

Touch pad and external mouse movements are working fine.

I am able to :

• Maximize,minimize,close an opened window using the buttons on window.
• Drag a window by double clicking and holding it.
• Rise up a context menu with a right click on the window border.
• Scroll through a page with the Mouse wheel.

I am not able to :

• Left click or right click on a panel.
• Open a menu item from the menu bar using click.
• Open a folder by double clicking it.
• Rise up a context menu for a right click inside the window area.
• Click an item in side pane.
• Scroll through a page dragging the scroll bar.
• Select OK or cancel in the pop up windows by a click. [To do so, I have to use tab to go the option and press enter].

It happened as follows :

I finished installing the packages planets, sugar-emulator, rlplot, gsynaptics, then opened the package planets, added a planet in the opened window.

*The planets window said to press Ctrl + Shift to release mouse from its window to normal ubuntu environment. I doubt my keystroke was wrong. I am not sure what i pressed. Something wrong went from there. *

I thought a restart would clear the problem, but it didn't. I removed all the installed packages and their dependencies, restarted my laptop. Still, the problem exists.

I am using my laptop with all the keyboard shortcuts i know. And i have to press tab many times to select something and it is really bad.

Solution ?

1. Should i install any drivers for my touch pad ?
2. Is there any option to restore my system to an earlier point of time as is possible in windows?
3. Should i change any settings ?
4. Can i recovery using any boot up installation?

To be short, I want to copy a folder to a location /usr/share/screenlets/.... in Ubuntu 10.04 system. I tried by logging in as root from terminal giving su.

I even changed my user account type to ADMINISTRATOR; Yet, no use. PASTE option in the context menu's list in the folder /usr/share/... is INACTIVE.

How can I copy those files?

When my system gets to suspension while the song being played, and got resumed from the suspension, I found my Rhythmbox player running but no sound coming even from the system. I had to suspend it and press the power button to get the sound back. Why is it happening so?

Whenever I need to copy some files and couldn't find a pen drive (I don't have bluetooth enabled in my laptop), I create a new ad-hoc wireless network in Windows and share the necessary files on the network and share files with the other system.

Now, I want to do the same with Ubuntu.

I can create a new network, but I am not able to share or send files.

I also don't know how to access the system connected to the network.

How can I do this?

I know that when a package is being installed, the root directory [I think?] gets an administrator lock and can't make an other installation at the same time.

Is there a way to stop that installation? If it is so, is it good to do?

I heard that it is better to leave the package to get installed and then try removing it. Is that true?

I was downloading a package using the terminal. I actually wanted to install package 'A'. But, by mistake started installing package 'B'. I wanted to stop downloading 'B' and start downloading 'A'.

I wasn't able to do that. I reset my network connection. I could stop downloading the package B. But, the administrator directory was locked and wasn't able to download other packages which made me to restart my system.

What command should I use to abort the active download of packages in ubuntu?