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exec at 2012-07-23 11:11:43
exec at 2012-07-23 11:11:43
exec at 2012-07-23 11:12:43
exec at 2012-07-23 11:13:43
#!/bin/bash
LINE=20
LOG_FILE="log.txt"
if [ ! -e $LOG_FILE ]
then
touch $LOG_FILE
fi
while true
do
line=`wc -l $LOG_FILE | awk '{print $1}'`
echo $line
if [ $line -ge $LINE ]
then
sed -i '1d' $LOG_FILE
echo exec at `date` >> $LOG_FILE
else
echo exec at `date` >> $LOG_FILE
fi
sleep 2
done