abstractively #!/bin/sh set -e WANTDIR="$1/postfix.service.wants" SERVICEFILE="/lib/systemd/system/postfix@.service" mkdir -p "$WANTDIR" ln -s "$SERVICEFILE" "$WANTDIR/postfix@-.service" for DIR in $(postconf -h multi_instance_directories); do ln -s "$SERVICEFILE" "$WANTDIR/postfix@$(postconf -o inet_interfaces= -hc "$DIR" multi_instance_name).service" done exit 0