diff --git a/scripts/setup-cloudflare-r2.sh b/scripts/setup-cloudflare-r2.sh
index b2007dc..43f7d28 100755
--- a/scripts/setup-cloudflare-r2.sh
+++ b/scripts/setup-cloudflare-r2.sh
@@ -3,7 +3,7 @@
 #
 # Connect to a Cloudflare's R2 storage using mochoa/s3fs
 #
-# Run this script on the Docker HOST to bind buckets using "linode-bucket"
+# Run this script on the Docker HOST to bind buckets using "cloudflare-r2"
 #  -- Or any alias you give with "--alias" option -- driver name.
 # Please refer to https://hub.docker.com/r/mochoa/s3fs-volume-plugin.
 # You may bind to different buckets using different aliases.
@@ -30,16 +30,18 @@ while test $# -ne 0; do
 	elif test "${key}" = "-a" || test "${key}" = "--alias"; then
 		PLUGIN_ALIAS="${value}";
 	elif test "${key}" = "-u" || test "${key}" = "--user"; then
-		if id "${value}" > /dev/null 2>&1; then
-			USER_ID="$(id -u "${value}")";
-		else
+		passwdEntry=$(getent passwd ${value} || echo ":NOT_FOUND:");
+		if test "${passwdEntry}" = ":NOT_FOUND:"; then
 			USER_ID="$(id -u)";
+		else
+			USER_ID=$(echo $passwdEntry | cut -d ':' -f 3);
 		fi
 	elif test "${key}" = "-g" || test "${key}" = "--group"; then
-		if id "${value}" > /dev/null 2>&1; then
-			GROUP_ID="$(id -g "${value}")";
-		else
+		groupEntry=$(getent group ${value} || echo ":NOT_FOUND:");
+		if test "${groupEntry}" = ":NOT_FOUND:"; then
 			GROUP_ID="$(id -g)";
+		else
+			GROUP_ID=$(echo $groupEntry | cut -d ':' -f 3);
 		fi
 	else
 		echo "Invalid \"${key}\" option";
diff --git a/scripts/setup-linode-objects.sh b/scripts/setup-linode-objects.sh
index e216649..b6c640a 100644
--- a/scripts/setup-linode-objects.sh
+++ b/scripts/setup-linode-objects.sh
@@ -28,16 +28,18 @@ while test $# -ne 0; do
 	elif test "${key}" = "-a" || test "${key}" = "--alias"; then
 		PLUGIN_ALIAS="${value}";
 	elif test "${key}" = "-u" || test "${key}" = "--user"; then
-		if id "${value}" > /dev/null 2>&1; then
-			USER_ID="$(id -u "${value}")";
-		else
+		passwdEntry=$(getent passwd ${value} || echo ":NOT_FOUND:");
+		if test "${passwdEntry}" = ":NOT_FOUND:"; then
 			USER_ID="$(id -u)";
+		else
+			USER_ID=$(echo $passwdEntry | cut -d ':' -f 3);
 		fi
 	elif test "${key}" = "-g" || test "${key}" = "--group"; then
-		if id "${value}" > /dev/null 2>&1; then
-			GROUP_ID="$(id -g "${value}")";
-		else
+		groupEntry=$(getent group ${value} || echo ":NOT_FOUND:");
+		if test "${groupEntry}" = ":NOT_FOUND:"; then
 			GROUP_ID="$(id -g)";
+		else
+			GROUP_ID=$(echo $groupEntry | cut -d ':' -f 3);
 		fi
 	else
 		echo "Invalid \"${key}\" option";