diff --git a/doc/git-log.txt b/doc/git-log.txt
new file mode 100644
index 0000000..efcc525
--- /dev/null
+++ b/doc/git-log.txt
@@ -0,0 +1 @@
+git submodule add -b z1 http://t:f6ad1fe79d0b929d8def3339dafcbf919f311acf@qstack.pl:3000/c2023/p22.10 app
diff --git a/run/__ b/run/__
new file mode 100644
index 0000000..a3f5eef
--- /dev/null
+++ b/run/__
@@ -0,0 +1 @@
+f() { sudo docker run --rm -dit --privileged --name "$1" deb su - user; }; f deb1
diff --git a/run/__v b/run/__v
new file mode 100644
index 0000000..4ce68e8
--- /dev/null
+++ b/run/__v
@@ -0,0 +1,6 @@
+f() { 
+    sudo docker run --rm -dit --privileged \
+        -v "$(pwd)/app:/home/user/work" \
+        --name "$1" deb su - user; 
+}; 
+f $1 
diff --git a/run/__vp b/run/__vp
new file mode 100644
index 0000000..41e072b
--- /dev/null
+++ b/run/__vp
@@ -0,0 +1,7 @@
+f() { 
+    sudo docker run --rm -dit --privileged \
+        -v "$(pwd)/app:/home/user/work" \
+        -p 3333:3333 \
+        --name "$1" deb su - user; 
+}; 
+f $1 
diff --git a/script/expose-netns.sh b/script/expose-netns.sh
new file mode 100644
index 0000000..011e381
--- /dev/null
+++ b/script/expose-netns.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+if [ $# -ne 1 ]; then
+    echo "Usage: $0 <container id or name>"
+    exit 1
+fi
+
+echo "expose container $1 netns"
+NETNS=`sudo docker inspect -f '{{.State.Pid}}' $1`
+
+if [ ! -d /var/run/netns ]; then
+    sudo mkdir /var/run/netns
+fi
+if [ -f /var/run/netns/$NETNS ]; then
+    sudo rm -rf /var/run/netns/$NETNS
+fi
+
+sudo ln -s /proc/$NETNS/ns/net /var/run/netns/$NETNS
+echo "done. netns: $NETNS"
+
+echo "============================="
+echo "current network namespaces: "
+echo "============================="
+ip netns