Shell Programming and Scripting

for ipaddr in $(cat ip_file); do
     ssh ${ipaddr} "sed -i '/rocommunity/s/public/sp1der/' /opt/adapter/Adapter/snmp/conf/snmpd.conf"
done

#!/bin/bash

#########################################################################################################
# Shellscript   :       rocommunity_change.sh - To change the community string 
# Version       :       V1.0
# Owner         :       Siddhesh Khavnekar <siddhesh.khavnekar@mobixell.com>
# Date          :       2012-03-28
# Category      :       Files Management
#########################################################################################################
# Description   :       This scipt will change rocommuniy from snmpd.conf on all nodes
# IP_LIST       :     Locating all your remote servers' ip addresses in ip_file one per line!
#########################################################################################################

#Defining Variable
#------------------------
IP_LIST=<path_to_file>

for ipaddr in $(cat IP_FILE); do
     ssh ${ipaddr} "sed -i '/rocommunity/s/public/sp1der/' /opt/adapter/Adapter/snmp/conf/snmpd.conf"
done

exit 0

#!/bin/bash

#########################################################################################################
# Shellscript   :       rocommunity_change.sh - To change the community string 
# Version       :       V1.0
# Owner         :       Siddhesh Khavnekar <siddhesh.khavnekar@mobixell.com>
# Date          :       2012-03-28
# Category      :       Files Management
#########################################################################################################
# Description   :       This scipt will change rocommuniy from snmpd.conf on all nodes
# IP_LIST       :     Locating all your remote servers' ip addresses in ip_file one per line!
#########################################################################################################

#Defining Variable
#------------------------
IP_LIST=/root/IP_LIST
ADAPTER_HOME=/opt/adapter
BACKUP_DIR=/var/tmp
DATE=`date +%Y%m%d%H%M%S`
LOG=/root/community_logs

#Backing Up Orginal Files
#-------------------------
echo "Backing up the original configuration file to $BACKUP_DIR" > $LOG.$DATE
cp -pv $ADAPTER_HOME/Adapter/snmp/conf/snmpd.conf $BACKUP_DIR/snmpd.conf_$(date +%d%b%Y)
cp -pv $ADAPTER_HOME/ManagementTool/conf/MTInternalConfig.properties $BACKUP_DIR/MTInternalConfig.properties_$(date +%d%b%Y)
echo "Orignal Log file back-up done succesfully" >$LOG.$DATE


Need to add code to prompt to change the string in snmpd.conf file. Please advice on the same. here it should promt to change the rocommunity string to sp1der in 
/opt/adapter/Adapter/snmp/conf/snmpd.conf. To be more specific what i want her, It should replace the value of "rocommunity" from public to spider. 
I cannot use sed, bcoz they want to enter the value when it prompts to enter the value. it could be any other value too.

#Verification of changes done.
#-----------------------------
grep -w 'ServerSNMPGetArgs' $ADAPTER_HOME/ManagementTool/conf/MTInternalConfig.properties | grep -w sp1der >> /dev/null
if 
[ $(echo $?) = 0 ]; then
echo "rocommunity string set to sp1der sucessfully in MTInternalConfig.properties for ServerSNMPGetArgs." >> $LOG.$DATE
else
echo "Could not set the rocommunity string to sp1der in MTInternalConfig.properties for ServerSNMPGetArgs. Check the file permission." >> $LOG.$DATE
fi


#Restarting Processes.
#---------------------

snmpd stop 
echo "SNMP process Stopped" >> $LOG.$DATE
sleep 15

snmpd start
echo "SNMP process Started" >> $LOG.$DATE

adapter restart
echo "Adapter restarted" >> $LOG.$DATE

managermenttool restart 
echo "Managementtool Restarted" >> $LOG.$DATE

exit 0