diff --git a/shell/scripts/prepareServer.sh b/shell/scripts/prepareServer.sh
index 42cfa0b..9b338a4 100644
--- a/shell/scripts/prepareServer.sh
+++ b/shell/scripts/prepareServer.sh
@@ -115,7 +115,7 @@ install_acl_apt() {
 
 group_add_docker() {
 	sh_c="$( exec_command )"
-	if command_exists usermod; then
+	if [ -f /sbin/usermod ]; then
 		$sh_c "usermod -aG docker $(id -un)"
 	else
 		cat >&2 <<-'EOF'
@@ -149,13 +149,13 @@ mk_docker_dir() {
 		fi
 		$sh_c "mkdir -p $docker_root/docker/ $docker_root/docker/compose $docker_root/docker/data"
 		$sh_c "chgrp docker $docker_root/docker"
-		$sh_c "chmod g+s $docker_root/docker"
-		$sh_c "setfactl -R -m u::rwx,g::rwx $docker_root/docker"
-		$sh_c "setfacl -d --set u::rwx,g::rwx,o::r-x $docker_root/docker"
+		$sh_c "chmod -R g+s $docker_root/docker"
+		$sh_c "setfacl -R -m u::rwx,g::rwx $docker_root/docker"
+		$sh_c "setfacl -R -d --set u::rwx,g::rwx,o::r-x $docker_root/docker"
 	)
 }
 
-install() {
+install_docker() {
 	sh_c="$( exec_command )"
 	distro="$( check_distro )"
 	version=""
@@ -173,7 +173,12 @@ install() {
 	esac
 }
 
-install
+read -p "Install docker? (y/N) " if_docker_group
+case $(to_lower $if_docker_group) in
+	"yes" | "y" | "yeah" | 1)
+		install docker
+	;;
+esac
 read -p "Add $(id -un) to docker group? (y/N) " if_docker_group
 case $(to_lower $if_docker_group) in
 	"yes" | "y" | "yeah" | 1)