清除Linux历史命令小脚本

[root@mysql-host1 ~]# vim /usr/local/script/his.sh
#!/bin/bash

#history
export HISTTIMEFORMAT="[%Y.%m.%d %H:%M:%S] "
export HISTFILESIZE=10000000
export HISTSIZE=1000000
export PROMPT_COMMAND="history -a"
USER_IP=`who -u am i 2>/dev/null| awk '{print $NF}'|sed -e 's/[()]//g'`
HISTDIR=/var/log/.hist
if [ -z $USER_IP ]
then
USER_IP=`hostname`
fi
if [ ! -d $HISTDIR ]
then
mkdir -p $HISTDIR
chmod 777 $HISTDIR
fi
if [ ! -d $HISTDIR/${LOGNAME} ]
then
mkdir -p $HISTDIR/${LOGNAME}
chmod 300 $HISTDIR/${LOGNAME}
fi
#export HISTSIZE=4096
DT=`date +%Y%m%d_%H%M%S`
#export HISTFILE="$HISTDIR/${LOGNAME}/${USER_IP}.hist.$DT"
export HISTFILE="$HISTDIR/${LOGNAME}/${HOSTNAME}.${USER_IP}.hist.$DT"
chmod 600 $HISTDIR/${LOGNAME}/*.hist* 2>/dev/null

每次登录加载全局环境变量

[root@mysql-host1 ~]# vim /etc/profile
#history
. /usr/local/script/his.sh