[Ubuntu-BD] Problem regarding netbeans

[Lenin]

On Sat, Aug 15, 2009 at 10:01 PM, tanjir <orko_147 at yahoo.com> wrote:

> Very good question. We often tell users to run commands, but I guess most
> times users don't really know what they mean.
> So, in the proposed solution, you were asked to run these two commands:
> 1. sudo chmod 755 netbeans-6.7.sh
> sudo: this command is used before other commands. For example, here, "chmod
> 755 something.sh" is a command by itself. But the command runs as current
> user. If you add sudo before this command, it will run as root user. Just
> for fun create a file called foo.txt. And copy like following "sudo cp
> foo.txt bar.txt" (It simply copies foo.txt file to bar.txt). Then type "ls
> -al" (it lists all the files and related information). You will see the
> owner of bar.txt is root. Now you can't remove bar.txt by "rm bar.txt", you
> have to use "sudo rm bar.txt". Once you remove try the same cp command
> without sudo (e.g. cp foo.txt bar.txt) and do "ls -al" and see the owner now
> is you.


Also this above section clearly tells you the danger it can create being the
root user all the time. You are creating all root owned files.

>
> chmod: stands for change mode of the file. Using chmod you can modify the
> file permission. By default in ubuntu, files don't have executable
> permission, so here you ar adding executable permission. To know more about
> chmod, read this article: http://ss64.com/bash/chmod.html


You also might be allowing everything to be executable. Which makes your
system extremely vulnerable!