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Since I guess most shell languages based on the original Bourne Shell are Turing complete you can code up anything, given enough time. The simplest case that I can think of is a shell script that...

Theoretically speaking, I believe the greater danger (than deleting data) is the random alteration of data. For instance, if I discovered that I was missing data for 100 people, I could restore a...

As long as he has access to files, echo -e or printf, and chmod, he has the ability to copy in executables from somewhere else. Not difficult, just tedious. And then they can craft a busybox or...

Kornshell 93 has a long list of commands built into the shell for performance reasons. So if you execute chmod in ksh93, you don't need the external chmod program. Sometimes you need to call chmod...

This should work for you.

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/file.h>
#include...

BTW, you might want to read this Linux Journal article Things You Never Should Do in the Kernel (http://www.linuxjournal.com/article/8110)

When you execute something, the ELF header appears in user space:

$ head -n1 /proc/self/maps
08048000-08050000 r-xp 00000000 08:23 98602 /bin/head
$
You could convert the ELF header into...