set tmux options
diff --git a/roles/common-prep/files/tmux.conf b/roles/common-prep/files/tmux.conf
new file mode 100644
index 0000000..70ab1d4
--- /dev/null
+++ b/roles/common-prep/files/tmux.conf
@@ -0,0 +1,3 @@
+set-option -g history-limit 10000
+set-window-option -g mode-keys vi
+