Dynamic postmulti management script

fix_instances.sh

#!/bin/bash

# assuming all of the instances start with "postf" e.g. "postfix-2" or "postfix-test"

mapfile -t instance_array < <( find /etc* -maxdepth 1 -type d -name "postf*" -printf "%f\n" )
for instance in "${instance_array[@]}"
do
   echo "copying resolv.conf for ${instance}"
   cp /etc/resolv.conf "/var/spool/${instance}/etc/resolv.conf"
   echo "updating ssl certs for ${instance}"
   mkdir -p "/var/spool/${instance}/etc/ssl/certs"
   cp /etc/ssl/certs/ca-certificates.crt "/var/spool/${instance}/etc/ssl/certs/ca-certificates.crt"
   if [[ ${instance} != postfix ]]; then
     echo "updating required libraries for ${instance}"
     mkdir -p "/var/spool/${instance}/lib"
     cp /var/spool/postfix/lib/x86_64-linux-gnu "/var/spool/${instance}/lib" -r
   fi
   echo "updating postfix token ownership for ${instance}"
   chown -R postfix:postfix /var/spool/${instance}/etc/tokens
done