history显示时间、IP、用户

# vim /etc/bashrc
USER_IP=`who -u am i 2>/dev/null| awk '{print $NF}'|sed -e 's/[()]//g'`
HISTFILESIZE=4000
HISTSIZE=4000
HISTTIMEFORMAT="%F %T ${USER_IP} `whoami` "
export HISTTIMEFORMAT 

# source /etc/bashrc