# -+- number -+- category -+- title -+- email -+- name -+- homepage -+- clickOnName -+- language -+- image -+- browser-used -+- security-cookie =0 -+- 2000-10-09:1 -+- UNIX Basics -+- Create /dev/null -+- zinowicz@frz.de -+- Mariusz Zinowicz -+- -+- nolink -+- English -+- -+- Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0) -+- 431 I have moved a file to /dev/null and now my system doesn't work

If you move a file with the mv command to "/dev/null" then it will be overwritten with an ordinary file.
How to fix it:
Boot your system. If it doesn't boot take a one disk distribution like Toms rtbt and mount your /dev/hdXX partition.
Now type in a shell "mknod /dev/null c 1 3" to create a nod file. /dev/null is the path where the nod file will be saved. The c stands for a character device and the two numbers are the major and the minor numbers for the null device.
After that you must change with "chmod 666 /dev/null" the read, write and execute permissions.

With "ls -alF /dev/" you will see all nod files with it's own three parameters like
"crw-rw-rw- 1 root root 1, 3 Oct 4 11:34 null ".
You will see a "c" in the near of the rwx flags an a " 1, 3" left of the date.