proxycheck software package provides checks existence of open proxy, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install proxycheck
proxycheck is installed in your system.
Make ensure the proxycheck package were installed using the commands given below,
$ sudo dpkg-query -l | grep proxycheck *
You will get with proxycheck package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Network |
| Package | proxycheck |
| Version | 0.49a-4 |
| Description | checks existence of open proxy |
| Sub Section | Net |