ppp script by Olivier Demah i'm using

if ! ping -c 1 195.154.210.135 >/dev/null 2>&1 ; then
        echo "`date` Connexion is Down !!!" >> /var/log/messages
        export IFACE=`ifconfig | grep ppp0 | awk '{print $1}'`
        echo "Mmm, interface = $IFACE" >> /var/log/messages
        if [ "$IFACE" != "ppp0" ]; then
            echo "`date` Connexion is Really Down!!" >> /var/log/messages
            kill -9 `ps -ef |grep pppd |awk '{ print $2 }'`
            kill -9 `ps -ef |grep pppoa2 |awk '{ print $2 }'`
            rmmod uhci
            sleep 3
            modprobe uhci
            sleep 3
            /usr/local/bin/modem_run -f /usr/local/bin/microcode.bin -m
            pppd call adsl
       fi
fi

another bash script using color codes

#!/bin/bash
RED="\033[0;31m"
GREEN="\033[0;32m"
WHITE="\033[1;37m"
DGRAY="\033[0;37m"

nmap -p 80 serverkommune.de | grep open > /dev/null
state=$?

if [ $state -eq 0 ]; then
       echo -en "$WHITE"
       echo -e "Status: $GREEN -> apache up, try to get serverkommune homepage"
       echo -en "$DGRAY"
       curl -s serverkommune.de | grep -i bude > /dev/null
       state=$?
       if [ $state -eq 0 ]; then
               echo -en "$WHITE"
               echo -e "Status: $GREEN -> fine -> found word 'bude' on the main html page!"
       else
               echo -en "$WHITE"
               echo -e "Status: $RED !> Couldn't get the main html page or word 'bude' has vanished from it!"
       fi
       echo -en "$DGRAY"
else
       echo -en "$WHITE"
       echo -e "Status: $RED !> apache down for some unknown reason, please repair NOW"
       echo -en "$DGRAY"
fi

argc and argv with bash

if [ ${#} -ne 2 ]; then

   echo "Usage $0 xsize ysize"
   echo "Example: $0 3 5"
   exit

fi

argc is ${#}

argv is ${0} ${1} ${2} ${...}