From /var/lib/dpkg/info/gmetad.postinst

gistfile1.txt

#!/bin/sh
set -e

if ! getent group ganglia >/dev/null; then
        echo Adding group: ganglia.
        groupadd --system ganglia
fi

if ! getent passwd ganglia >/dev/null; then
        echo Adding system user: ganglia.
        useradd --system ganglia
        usermod -c "Ganglia Monitor"    ganglia
        usermod -d "/var/lib/ganglia"   ganglia
        usermod -g "ganglia"            ganglia
        usermod -s "/bin/false"         ganglia
fi

if [ ! -d /var/lib/ganglia/rrds ]; then
  mkdir -p /var/lib/ganglia/rrds
fi
if [ -d /var/lib/ganglia/rrds ]; then
  chown -R ganglia:ganglia /var/lib/ganglia
  chown -R nobody /var/lib/ganglia/rrds
  chmod 0755 /var/lib/ganglia
  chmod -R o-w /var/lib/ganglia/rrds
fi

# Automatically added by dh_installinit
if [ -x "/etc/init.d/gmetad" ]; then
        update-rc.d gmetad defaults >/dev/null
        invoke-rc.d gmetad start || exit $?
fi
# End automatically added section


exit 0