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upload mass deface mass delete console info server
name : cfghostdomain
 #!/bin/bash
#
# Copyright (C) Microsoft Corporation. All rights reserved.
#
# Set hostname and DNS domain name
# 

function usage {
  WriteError "Invalid arguments provided" ${thisscript}
  echo "Usage: $0 hostname=Hostname [dnsdomainname=DNSDomainName]"
}

#Check Acceptibility of input Hostname (set it if valid)
function ValidateHostname {
   cfgExec  "hostname "$1""  warning  "Failed to set runtime hostname"  ${thisscript} 
   hostnameExitCode=$?
   if [ $hostnameExitCode != 0 ]
   then
       WriteError "Specified hostname is invalid, cannot proceed" ${thisscript}
       exit ${hostnameExitCode}
   fi
}

#Vars
retcode=0
thisscript=${0}
distro="unknown"
hostname=""
dnsdomainname=""
fqdn=""
currentname=""

#Include utilities script
source $(dirname ${0})/utilities

VALID_INPUT=0
for arg in $@; do
    set -- `echo ${arg} | tr '=' ' '`
	case "$1" in
	 hostname )
	    hostname="${2}"
	    VALID_INPUT=1
	    ;;
	 dnsdomainname )
	    dnsdomainname="${2}"
	    ;;
	 * )
	    usage
	    exit -1
	 ;;
	esac
done

if [ $VALID_INPUT == 0 ]
then
   usage
   exit -1
elif [ $VALID_INPUT == 1 ]
then
   WriteInfo "All inputs validated" ${thisscript}
fi

#Get Distro family
GetDistroFamily

#Construct fqdn
if [ -n "${hostname}" ] && [ -n "${dnsdomainname}" ]
then
   fqdn="${hostname}.${dnsdomainname}"
else
   fqdn="${hostname}"
fi

#Remove entries currently in /etc/hosts for this host
WriteInfo "Removing old host entries from /etc/hosts" ${thisscript}
currentname=`sysctl kernel.hostname |cut -f2 -d= |tr -d '[:space:]'`
cfgExec  "sed -i".bak" '/'${currentname}'/d' /etc/hosts"  warning  "Failed to remove old hostnames from /etc/hosts"  ${thisscript} 

#SetHostname
ValidateHostname ${hostname}
WriteInfo "Setting hostname to ${hostname}" ${thisscript}
if [ ${distro} = "DEBIAN" ]
then 
   cfgExec  'echo -e "${hostname}" > "/etc/hostname"'  error  "Failed to write hostname to /etc/hostname"  ${thisscript} 
elif [ ${distro} = "RHEL" ]
then
   cfgfile="/etc/sysconfig/network"
   cfgExec  "sed -i".bak" '/HOSTNAME=/d' ${cfgfile}"  error  "Failed to purge HOSTNAME entry from ${cfgfile}"  ${thisscript} 
   echo -e "\n" >> "${cfgfile}"
   cfgExec  'echo -e "HOSTNAME=${hostname}" >> ${cfgfile}'  error  "Failed to write HOSTNAME entry to ${cfgfile}"  ${thisscript} 

   if [ -e /etc/hostname ]
   then
	  cfgExec  'echo -e "${hostname}" > "/etc/hostname"'  error  "Failed to write hostname to /etc/hostname"  ${thisscript} 
   fi

elif [ ${distro} = "SUSE" ]
then
   cfgExec  'echo -e "${hostname}" > "/etc/HOSTNAME"'  error  "Failed to write hostname to /etc/HOSTNAME"  ${thisscript} 
else
    WriteError "Unable to detect Linux distribution, cannot proceed" ${thisscript}
    exit=-1
fi

#SetDNSSearchSuffix
if [ -n "${dnsdomainname}" ]
then
   WriteInfo "Configuring search and domain entries in /etc/resolv.conf" ${thisscript}
   cfgExec  "sed -i".bak" '/^search /d' /etc/resolv.conf"  warning  "Failed to delete old search entry from resolv.conf"  ${thisscript} 
   cfgExec  "sed -i".bak" '/^domain /d' /etc/resolv.conf"  warning  "Failed to delete old domain entry from resolv.conf"  ${thisscript}
   echo -e "\n" >> "/etc/resolv.conf"
   cfgExec 'echo -e "search ${dnsdomainname}" >> "/etc/resolv.conf"'  warning  "Failed to write search entry to resolv.conf"  ${thisscript} 
   cfgExec 'echo -e "domain ${dnsdomainname}" >> "/etc/resolv.conf"'  warning  "Failed to write domain entry to resolv.conf"  ${thisscript} 
fi


#Validate
currentname=`sysctl kernel.hostname |cut -f2 -d= |tr -d '[:space:]'`
if [ ! "${currentname}" = "${hostname}" ]
then
   WriteError "Current hostname ${currentname} does not match expected hostname ${hostname}" ${thisscript}
   retcode=-1
fi

exit ${retcode}
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