POSTIN

/bin/sh

if [ $1 -eq 1 ] ; then
  /usr/sbin/update-alternatives --install /usr/sbin/snort \
    snort /usr/sbin/snort-snmp 60
fi

POSTUN

/bin/sh

if [ $1 -eq 0 ] ; then
  /usr/sbin/update-alternatives --remove snort /usr/sbin/snort-snmp 
fi