Linux system CPU, root partition, Memory monitor script

#！ /bin/bash
#提取性能监控指标 (disk occupancy, CPU consumption, memory usage)
dug=$ (df-h| grep "/$" |awk ' {print $} ' |awk-f% ' {print $} ')
cug=$ (expr-$ (mpstat | tail-1 |awk ' {print $11} ' | awk-f. ' {print $} '))
mug=$ (expr $ (Free |grep "cache:" | awk ' {print $} ') * +/$ (free | grep "Mem:" | awk ' {print $} ') amail= "[email protected]"
Br/> #设置告警邮箱
Alog= "/tmp/alert.txt"
Amail= "[email protected]"
If [$DUG-GT 5]
Then
echo "Disk usage: $DUG%" >> $ALOG
Fi
If [$CUG-GT 5]
Then
echo "CPU usage: $CUG%" >> $ALOG
Fi
If [$MUG-GT 5]
Then
echo "Memory usage: $MUG%" >> $ALOG
Fi
#判断是否发送告警邮件, finally delete the alarm log file
If [-F $ALOG]
Then
Cat $ALOG | Mail-s "host Alert" $AMAIL
RM-RF $ALOG
Fi

Linux system CPU, root partition, Memory monitor script