Linux使用者登入記錄分析指令碼

#!/bin/bash
TDATE=`date +"%b %-d"`
YDATE=`date -d last-day +"%b %-d"`
last root|grep pts|grep -v still|awk '{print $1","$3","$5,$6","$7","$9","$10}'|grep "$TDATE">last
last root|grep pts|grep -v still|awk '{print $1","$3","$5,$6","$7","$9","$10}'|grep "$YDATE">>last
STDATE=`date -d "$TDATE" +%Y%m%d`
SYDATE=`date -d "$YDATE" +%Y%m%d`
sed -e "s/$TDATE/$STDATE/" last|sed -e "s/$YDATE/$SYDATE/">lastb

 

TDATE:today
YDATE:yesterday
STDATE:String format today
SYDATE:String format yesterday
lastb:result