Register an RHEL6 or RHEL7 server to an in-house RHN Satellite server

register_rhn.sh

#!/bin/bash
# register the RHN satellite server
# @UmbrielSecurity

ACTIVATION_KEY="X-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
SATELLITE_SERVER="satellite.example.com"

TOOLCHECK=0
# Validate necessary tools
echo Ensuring we have the necessary tools...
CAT=`which cat 2> /dev/null`
TOOLCHECK=$(expr ${TOOLCHECK} + $?)
AWK=`which awk 2> /dev/null`
TOOLCHECK=$(expr ${TOOLCHECK} + $?)
WGET=`which wget 2> /dev/null`
TOOLCHECK=$(expr ${TOOLCHECK} + $?)
CUT=`which cut 2> /dev/null`
TOOLCHECK=$(expr ${TOOLCHECK} + $?)
SUDO=`which sudo 2> /dev/null`
TOOLCHECK=$(expr ${TOOLCHECK} + $?)
YUM=`which yum 2> /dev/null`
TOOLCHECK=$(expr ${TOOLCHECK} + $?)

if [ ${TOOLCHECK} -ne 0 ]; then
  echo ERROR: One or more tools cannot be found, Aborting... Check tools.
  exit 1;
else
  echo Found tools:
  echo -----------------
  echo cat  : ${CAT}
  echo cut  : ${CUT}
  echo awk  : ${AWK}
  echo yum  : ${YUM}
  echo wget : ${WGET}
  echo sudo : ${SUDO}
  echo ------------------
  echo
  read -p "Press [Enter] to proceed, or CTRL-C to quit." < /dev/tty
fi

# ID what version of redhat
if [ -f /etc/redhat-release ]; then
    osversion=`${CAT} /etc/redhat-release | ${AWK} '{ print $7 }' | ${CUT} -d. -f1`
fi

if [ ! -z ${osversion} ]; then
  echo Found OS version: ${osversion}
  ## version specific code
  # rhel 7 specific commands 
  rhel_7() {
    echo "Installing RHEL 7 Config..."
    # disable rhsmcertd.service
    ${SUDO} /bin/systemctl stop rhsmcertd.service
    ${SUDO} /bin/systemctl disable rhsmcertd.service
    # install the epel cert 
    ${SUDO} rpm --import http://${SATELLITE_SERVER}/pub/RPM-GPG-KEY-EPEL-7
  }

  # rhel 6 specific commands 
  rhel_6() {
    echo "Installing RHEL 6 Config..."
    # install the epel cert 
    ${SUDO} rpm --import http://${SATELLITE_SERVER}/pub/RPM-GPG-KEY-EPEL-6
  }
 
  # select the right version and run the install
  if [ $osversion -eq 7 ]; then
    rhel_7
  elif [ $osversion -eq 6 ]; then
    rhel_6
  fi
else
  echo Could not determine OS version, Aborting.
  exit 1;
fi

echo Installing RPM key...
# install RPM-GPG-KEY-redhat-release cert
${SUDO} rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

echo Installing Satellite Server certificate...
# install Adobe satelite ssl cert file${SUDO} ${WGET} -O /usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT http://${SATELLITE_SERVER}/pub/RHN-ORG-TRUSTED-SSL-CERT

echo Installing u2pdate...
# install up2date file from satelite server${SUDO} ${WGET} -O /etc/sysconfig/rhn/up2date http://${SATELLITE_SERVER}/pub/up2date

echo Registering with Satellite server...
# register the host with satelite server 
${SUDO} /usr/sbin/rhnreg_ks --activationkey ${ACTIVATION_KEY} --force

${SUDO} ${YUM} repolist

exit 0