Hi,
When you connect to remote host using shell, then make sure to clear the history before you logout.
#command to clear the history is
history -c && rm -f ~/.bash_history
#Shell commands ref:
http://www.blogger.com/publish-confirmation.g?blogID=6810438578552048741&postID=843161968983163768×tamp=1272031182981&javascriptEnabled=true