记录所有的登录操作日志
vim /etc/profile
export HISTORY_FILE=/var/log/usermonitor/usermonitor.log
export PROMPT_COMMAND='{ date "+%y-%m-%d %T ##### $(who am i |awk "{print \$1\" \"\$2\" \"\$5}") #### $(id|awk "{print \$1}") #### $(history 1 | { read x cmd; echo "$cmd"; })"; } >>$HISTORY_FILE'
source /etc/profile
mkdir /var/log/usermonitor