Run PatchMon generated installer with bash

patchmon-enroll.sh

@@ -268,10 +268,15 @@ if [[ "$PRINT_ONLY" == "true" ]]; then
 fi
 
 log "Running PatchMon enrollment script as type: $ENROLL_TYPE"
+# PatchMon's generated scripts use bash-specific features. The proxmox-lxc
+# installer in particular contains `trap ... ERR`, which fails under Debian's
+# /bin/sh (dash) with `trap: ERR: bad trap`. Always execute the generated
+# installer with bash.
+need_cmd bash
 if [[ -n "$FRIENDLY_NAME_VALUE" ]]; then
-  FRIENDLY_NAME="$FRIENDLY_NAME_VALUE" sh "$tmp_script"
+  FRIENDLY_NAME="$FRIENDLY_NAME_VALUE" bash "$tmp_script"
 else
-  sh "$tmp_script"
+  bash "$tmp_script"
 fi
 
 normalize_agent_config