diff --git a/opt/bin/alpine b/opt/bin/alpine
deleted file mode 100755
index 35b2aa9..0000000
--- a/opt/bin/alpine
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-# useradd -md /home/sandbox -s /opt/bin/alpine sandbox
-# usermod -aG docker sandbox
-exec docker run --rm -it alpine
diff --git a/opt/bin/sandbox b/opt/bin/sandbox
new file mode 100755
index 0000000..85f62a0
--- /dev/null
+++ b/opt/bin/sandbox
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+# useradd -md /home/sandbox -s $0 sandbox
+# usermod -aG docker sandbox
+# echo "$0" | sudo tee -a /etc/shells  # for pam
+exec docker run --rm -it --name sandbox --network none alpine