Debian upgrade

#!/bin/bash
if [ `cat /etc/issue | grep 4.0 | wc -l` = "1" ]; then
echo "############### Debian Etch repo beallitasa... ###############"
echo "deb ftp://ftp.de.debian.org/archive/debian/ etch main contrib non-free
deb-src ftp://ftp.de.debian.org/archive/debian/ etch main contrib non-free" > /etc/apt/sources.list
apt-get update
echo "############### Debian Etch frissitesek telepitese... ###############"
apt-get upgrade
apt-get dist-upgrade
echo "############### Debian Lenny repo beallitasa... ###############"
echo "deb ftp://ftp.de.debian.org/archive/debian/ lenny main contrib non-free
deb-src ftp://ftp.de.debian.org/archive/debian/ lenny main contrib non-free" > /etc/apt/sources.list
apt-get update
echo "############### Frissites Debian Lenny-re... ###############"
apt-get dist-upgrade
echo "Frissites kesz. Inditsd ujra a gepet majd futtasd ujra ezt a scriptet."
exit
fi

if [ `cat /etc/issue | grep 5.0 | wc -l` = "1" ]; then
echo "############### Debian Lenny repo beallitasa... ###############"
echo "deb ftp://ftp.de.debian.org/debian/ lenny main contrib non-free
deb-src ftp://ftp.de.debian.org/debian/ lenny main contrib non-free" > /etc/apt/sources.list
apt-get update
echo "############### Debian Lenny frissitese... ###############"
apt-get upgrade
apt-get dist-upgrade
echo "############### Debian Squeeze repo beallitasa... ###############"
echo "deb http://ftp.de.debian.org/debian squeeze main contrib non-free
deb-src http://ftp.de.debian.org/debian squeeze main contrib non-free" > /etc/apt/sources.list
apt-get update
echo "############### Frissites Debian Squeeze-re... ###############"
apt-get dist-upgrade
echo "Frissites kesz. Inditsd ujra a gepet majd futtasd ujra ezt a scriptet."
exit
fi


if [ `cat /etc/issue | grep 6.0 | wc -l` = "1" ]; then
echo "Debian Squeeze repo beallitasa..."
echo "deb http://ftp.de.debian.org/debian squeeze main contrib non-free
deb-src http://ftp.de.debian.org/debian squeeze main contrib non-free" > /etc/apt/sources.list
apt-get update
echo "Debian Squeeze frissitese..."
apt-get upgrade
apt-get dist-upgrade
echo "Frissites kesz. Rendszered napra kesz."
exit
fi