Syscall Hijacking: Dynamically obtain syscall table address (kernel 2.6.x)

Hi. In this post I’ll show you how to obtain dynamically the syscall table address. In the last posts (this and this) I wrote codes in which the syscall table address was hardcoded (as suggested by sj).
Now I’ll show you how to dinamically obtain it.

Bash http_proxy: from a user environment to sudo one

Hi. Sometimes you can’t connect directly to internet, because you have to go through a proxy (i.e. working environment).
Did you ever have to set up an http proxy on linux shell in order to (i.e) download a new package or manually update your distribution with a packet manager?
If so, you need to be a superuser. If you use the “sudo” command, you will probably stumbled across the inability to export variables from the user environment to the “sudo” one.