解决方法:vim /etc/bashrc

在第一个case的else下面增加以下内容:

USER_IP=`who -u am i 2>/dev/null| awk '{print $NF}'|sed -e 's/[()]//g'`
                if [ "$USER_IP" = "" ]
                then
                USER_IP=`hostname`
                fi
                if [ ! -d /root/dbasky ]
                then
                mkdir /root/dbasky
                chmod 600 /root/dbasky
                fi
                if [ ! -d /root/dbasky/${LOGNAME} ]
                then
                mkdir /root/dbasky/${LOGNAME}
                chmod 600 /root/dbasky/${LOGNAME}
                fi
DT=`date "+%Y%m%d_%H%M%S"`
export PROMPT_COMMAND='{ date "+[ %Y%m%d %H:%M:%S `whoami` ] `history 1 | { read x cmd; echo "$cmd      from ip:$SSH_CLIENT   $SSH_TTY"; }`"; }>>/root/dbasky/${LOGNAME}/${USER_IP}dbasky.$DT'
chmod 600 /root/dbasky/${LOGNAME}/*dbasky* 2>/dev/null

保存退出就可以了。