Generate and copy /etc/hosts file to all hosts

The scripts that I am sharing are used to do the DB2 pureScale install on 'n' number of hosts. One of the issue is to have consistent /etc/hosts file on all nodes.

The input file is ip.txt similar to the previous posts.

Script to generate and copy hosts file to all hosts

#!/bin/bash

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

if [ $# -lt 1 ] ; then
    echo "Usage: $0 "
    exit 1
fi

function runrcmd ()
{
     expect -c "
     set timeout 2
     spawn $1 
     expect eof { return ; }
     expect \"yes/no\" { send \"yes\r\" }
     expect \"*Password:*\" { send \"$rootpassword\r\" }
     expect \"(.*)\r\"
    "
}

SCHOME=./backup
IPFILE=$SCHOME/ip.txt
HOSTFILE=/tmp/hosts
HOSTHEAD=$SCHOME/hosts.head
LOGFILE=

#################### Fix ip.txt ###################
/usr/bin/dos2unix $IPFILE
###############################################################

############ Fix hosts file #################
sed -i /50000/d /etc/services
cat $HOSTHEAD > $HOSTFILE

while read a b c d
do
   NM=${d%%.*}
   echo $b $d $NM >> $HOSTFILE
done < $IPFILE
#############################################

############### Build server list from ip.txt #####
i=0
while read a b c d
do
  SHORTNM=${d%%.*}
  servers[$i]=$b
  ((i++))
done < $IPFILE
echo "server list " ${servers[@]}
###################################################

########## Copy hosts to each server ##############
for ((i = 0; i < ${#servers[@]}; ++i));
do
  server=${servers[$i]};
  echo Copy generated hosts file to $server
  runrcmd "/usr/bin/scp $HOSTFILE $server:/etc/hosts"
done
###################################################

Download the script here.