joe@localpub# cat >> .bashrc << EOF
EXPORT REMP="ping -c 10 IP.ADD.RE.SS"
EOF
joe@localpub# source .bashrc

i grep from the ICMP/IPtables log who has pinged me 10 times. i dont even appear in your .bash_history or parse the ping -c 10 IP.ADD.RE.SS from egress traffic log at startup/shutdown. now you audit. :-p