#! /usr/bin/env bash replace_var() { file="${1}" var="${2}" sed -e "s?${var}?${!var}?g" -i "${file}" } replace_vars() { file="${1}" for var in $(cat /etc/vars-vars) do replace_var "${file}" "${var}" done } replace_files() { for file in $(cat /etc/vars-files) do replace_vars "${file}" done } replace_files rm -f /var/run/dovecot/master.pid && rm -f /var/run/exim4/exim.pid && service exim4 start && dovecot -F