vim /etc/profile   末尾添加,然后保存
PS1="`whoami`@`hostname`:"'[$PWD]'
history
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 /tmp/cmuse ]
then
    mkdir /tmp/cmuse
    chmod 777 /tmp/cmuse
fi

if [ ! -d /tmp/cmuse/${LOGNAME} ]
then
    mkdir /tmp/cmuse/${LOGNAME}
    chmod 300 /tmp/cmuse/${LOGNAME}
fi

export HISTSIZE=4096
DT=`date "+%Y-%m-%d_%H:%M:%S"`
export HISTFILE="/tmp/cmuse/${LOGNAME}/${USER_IP}_cmuse.$DT"
chmod 600 /tmp/cmuse/${LOGNAME}/*cmuse* 2>/dev/null

source /etc/profile