How to check proxy settings?

Can not detect proxy settings.?

How can I install Firefox 3.

6.13 and be able to use it through the proxy settings

!info firefox. firefox (source: firefox): safe and easy web browser from Mozilla. In component main, is optional. Version 3.13-1ubuntu1 (hardy), package size 11129 kB, installed size 29908 kB
I'm running 64 bit hardy and whenever I try to run my .jar file I get an "illegal operation" error message. The .jar file runs fine on 32 bit. The error I'm getting is: java.lang.IllegalArgumentException: Unable to find a version of Java Runtime Environment compatible with -version
Any help would be appreciated. jason: the java app is compatible with java 6. What's the difference between java 6 and java 6 runtime environment? If I install java 6 runtime will I have the same error? jason: they are both the same, they are both different. jason: you will need to compile the app to use it. jason: or get a native 64bit app. I'm just trying to run a java app. and it's giving me an error. :/. jason: no, you need to run the app that you wish to run in the terminal. what is the command line to run java applications? I'm new to linux. jason: you can also use the jre to run java apps. I'm sorry. Could you rephrase your question please? jason: sudo apt-get install sun-java6-jre; sudo update-alternatives --config java. jason: you need to install java first then you can configure the environment to use java. Thank you, that worked.

How to check proxy settings?

I'm using wget to download some pages from websites.

But some sites have "Proxy settings" which prevent my wget to connect to their sites. ? I know that this is not a good practice to use proxy, but it's really necessary for some reasons. So I want to know how to check proxy settings and how to disable them or remove them, if they are found.

You can run your wget in a non-interactive way, and then set the environment variable httpproxy to the proxy server you want to use. Wget -O- You can then grep the output of that request to detect if it's been proxied (or otherwise modified by an intermediate system).example.com (www.com)168.19 connected.

HTTP request sent, awaiting response.com (www.com)

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