diff --git a/classes/phosphor-rootfs-postcommands.bbclass b/classes/phosphor-rootfs-postcommands.bbclass
new file mode 100644
index 0000000..3485661
--- /dev/null
+++ b/classes/phosphor-rootfs-postcommands.bbclass
@@ -0,0 +1,10 @@
+#
+# This function is intended to add root to corresponding groups if 'debug-tweaks' or 'allow-root-login' is in IMAGE_FEATURES.
+#
+update_root_user_groups () {
+	if [ -e ${IMAGE_ROOTFS}/etc/group ]; then
+		sed -i '/^\(ipmi\|web\|redfish\|priv-admin\):.*:.*:$/s/$/root/' ${IMAGE_ROOTFS}/etc/group
+	fi
+}
+# Add root user to the needed groups
+ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'allow-root-login' ], "update_root_user_groups; ", "", d)}'
diff --git a/conf/distro/include/phosphor-base.inc b/conf/distro/include/phosphor-base.inc
index 20fd216..7970fef 100644
--- a/conf/distro/include/phosphor-base.inc
+++ b/conf/distro/include/phosphor-base.inc
@@ -133,7 +133,7 @@
 KERNEL_FEATURES_append = " phosphor-gpio-keys"
 KERNEL_FEATURES_remove_qemuall = " phosphor-gpio-keys"
 
-IMAGE_CLASSES_append = " image_types_phosphor"
+IMAGE_CLASSES_append = " image_types_phosphor phosphor-rootfs-postcommands"
 IMAGE_CLASSES_append_npcm7xx = " image_types_phosphor_nuvoton"
 
 IMAGE_INSTALL_append = " dbus-broker"
diff --git a/recipes-phosphor/interfaces/bmcweb_git.bb b/recipes-phosphor/interfaces/bmcweb_git.bb
index 396f978..e08b3b8 100644
--- a/recipes-phosphor/interfaces/bmcweb_git.bb
+++ b/recipes-phosphor/interfaces/bmcweb_git.bb
@@ -6,8 +6,6 @@
 # add a user called httpd for the server to assume
 USERADD_PARAM_${PN} = "-r -s /usr/sbin/nologin bmcweb"
 GROUPADD_PARAM_${PN} = "web; redfish"
-# Add root user to web & redfish group
-GROUPMEMS_PARAM_${PN} = "-g web -a root; -g redfish -a root"
 
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://LICENCE;md5=a6a4edad4aed50f39a66d098d74b265b"
diff --git a/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb b/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
index f654d0c..e41da0b 100644
--- a/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
+++ b/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
@@ -54,8 +54,6 @@
 USERADD_PACKAGES = "${PN}"
 # add ipmi group
 GROUPADD_PARAM_${PN} = "ipmi"
-# Add root user to ipmi group
-GROUPMEMS_PARAM_${PN} = "-g ipmi -a root"
 
 SYSTEMD_SERVICE_${PN} += "xyz.openbmc_project.Ipmi.Internal.SoftPowerOff.service phosphor-ipmi-host.service"
 
diff --git a/recipes-phosphor/users/phosphor-user-manager_git.bb b/recipes-phosphor/users/phosphor-user-manager_git.bb
index dee81eb..4ccf0c3 100644
--- a/recipes-phosphor/users/phosphor-user-manager_git.bb
+++ b/recipes-phosphor/users/phosphor-user-manager_git.bb
@@ -26,9 +26,6 @@
 GROUPADD_PARAM_${PN} = "priv-admin; priv-operator; priv-user; priv-callback "
 GROUPADD_PARAM_phosphor-ldap = "priv-admin; priv-operator; priv-user; priv-callback "
 
-# Add root user to priv-admin group
-GROUPMEMS_PARAM_${PN} = "-g priv-admin -a root"
-
 DBUS_SERVICE_${PN} += "xyz.openbmc_project.User.Manager.service"
 FILES_phosphor-ldap += " \
         ${bindir}/phosphor-ldap-conf \