diff --git a/deploy/README.md b/deploy/README.md
index b1c7ba4..40bc49f 100644
--- a/deploy/README.md
+++ b/deploy/README.md
@@ -37,15 +37,15 @@ resort, it's always capable via customizing Linux kernel.
 **general deploy redroid instructions**
 ```
 ## install docker https://docs.docker.com/engine/install/#server
+## or use podman
 
 ## make sure required kernel features enabled; Check details on per distro page
 
-## make sure cgroup v1 present (some latest OS may only mount cgroup v2, ubuntu 22.04 etc.)
+## make sure cgroup v1 mounted if running redroid 8 / 9
 ## add `systemd.unified_cgroup_hierarchy=0` to kernel cmdline
 
 ## disable SELinux if present
-## setenforce 0
-
+setenforce 0
 
 ## running redroid
 docker run -itd --rm --privileged \
@@ -72,24 +72,12 @@ scrcpy -s localhost:5555
 ###     typically running scrcpy on your local PC
 
 
-## running without `ashmem` (removed since linux 5.18)
-## NOTE: plan to enable `memfd` by default
-docker run -itd --rm --privileged \
-    --pull always \
-    -v ~/data11:/data \
-    -p 5555:5555 \
-    --name redroid11 \
-    redroid/redroid:11.0.0-latest \
-    androidboot.use_memfd=1
-
-
-## running 64bit-only redroid (only redroid12 published)
-## some ARM CPUs only support 64bit mode, or just want to remove legacy 32bit runtime
+## running 64bit-only redroid
+## only `aarch64` supported by some Arm platforms, the 64only image required here
 docker run -itd --rm --privileged \
     --pull always \
     -v ~/data12_64only:/data \
     -p 5555:5555 \
     --name redroid12_64only \
     redroid/redroid:12.0.0_64only-latest \
-
 ```
diff --git a/deploy/ubuntu.md b/deploy/ubuntu.md
index 57375bf..727ec44 100644
--- a/deploy/ubuntu.md
+++ b/deploy/ubuntu.md
@@ -1,33 +1,16 @@
 # Deploy redroid on ubuntu
 ```
-# for 5.0+ kernel
+##############################
+## Ubuntu 22.04
+##############################
 
-## Android required kernel features are packaged in `linux-modules-extra-xxx`
+## install required kernel modules
 apt install linux-modules-extra-`uname -r`
 modprobe binder_linux devices="binder,hwbinder,vndbinder"
+### optional module (removed since 5.18)
 modprobe ashmem_linux
 
-## auto load modules
-cat /etc/modules-load.d/redroid.conf
-binder_linux
-ashmem_linux
-
-cat /etc/modprobe.d/redroid.conf
-options binder_linux devices="binder,hwbinder,vndbinder"
-
-
-# for kernel version before 5.0
-
-## option A:
-### upgrade to 5.0+ kernel
-### https://wiki.ubuntu.com/Kernel/LTSEnablementStack
-
-## option B:
-### check https://github.com/remote-android/redroid-modules
-### to install out of tree `binderfs` / `ashmem` kernel modules
-
-
-# running redroid
+## running redroid
 docker run -itd --rm --privileged \
     --pull always \
     -v ~/data11:/data \
@@ -35,4 +18,31 @@ docker run -itd --rm --privileged \
     --name redroid11 \
     redroid/redroid:11.0.0-latest
 
+
+##############################
+## Ubuntu 20.04
+##############################
+
+## install required kernel modules
+apt install linux-modules-extra-`uname -r`
+modprobe binder_linux devices="binder,hwbinder,vndbinder"
+### optional module (removed since 5.18)
+modprobe ashmem_linux
+
+## running redroid normally
+
+
+##############################
+## Ubuntu 18.04
+##############################
+
+## upgrade kernel (5.0+)
+apt install linux-generic-hwe-18.04
+
+## install required kernel modules
+modprobe binder_linux devices="binder,hwbinder,vndbinder"
+### optional module (removed since 5.18)
+modprobe ashmem_linux
+
+## running redroid normally
 ```