在/etc/profile或/etc/profile.d/下，或者在/etc/init.d/rc.local里加下面一段命令：

export HISTTIMEFORMAT="%F %T whoami "
export PROMPT_COMMAND='{ msg=$(history 1 | { read x y; echo $y; }); logger "[euid=$(whoami)]":$(who am i):[pwd]"$msg";}'