From b752980939a34d25dc2bb10b6f974c99145051c0 Mon Sep 17 00:00:00 2001
From: Jaromil <jaromil@dyne.org>
Date: Thu, 23 Jul 2015 15:11:05 +0200
Subject: [PATCH] usage note: delete history (#201)

---
 INSTALL.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/INSTALL.md b/INSTALL.md
index 22110ce..81b0ff8 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -75,6 +75,17 @@ command:
 eval $(gpg-agent --daemon --write-env-file "${HOME}/.gpg-agent-info")
 ```
 
+### Deleting history
+
+To improve deniability one has to avoid that tomb commands are
+recorded in the shell history. In order to do so the
+`HISTIGNORESPACE=1` environment setting of Zsh comes handy.  Anywhere
+in the `.zshrc` put:
+```
+export HISTIGNORESPACE=1
+alias tomb=' tomb'
+```
+
 
 # Advanced usage