Coredump
Work, play, and everything in-between 

#!/bin/bash
# Switch IP script, v.1 - iandexter@philrice.gov.ph
 
CONFIG_DIR=/etc/sysconfig/network-scripts
ROOT_UID=0
ERRROR_XCD=66
ERROR_NOTROOT=67
 
# Run as root
if [ "$UID" -ne "$ROOT_UID" ]
then
   echo "Must be root to run this script."
   exit $ERROR_NOTROOT
fi
 
cd $CONFIG_DIR || {
   echo "Cannot change to config dir."
   exit $ERROR_XCD
}
 
if [ -z "$1" ]
then
   echo "Usage: `basename $0` [afrdis|preginet|globe]"
   exit 1
else
   if grep -q $1 ifcfg-eth0
   then
      echo "Already linked. Not switching anymore."
      exit 0
   else
      echo "Switching to $1 link..."
      cp ifcfg-eth0.$1 ifcfg-eth0
      ifdown eth0
      ifup eth0
      ifconfig eth0
      exit 0
   fi
fi