1、查看主機網卡流量

代碼如下:
#!/bin/bash
#network
#Mike.Xu
while : ; do
      time='date +%m"-"%d" "%k":"%M'
      day='date +%m"-"%d'
      rx_before='ifconfig eth0|sed -n "8"p|awk '{print $2}'|cut -c7-'
      tx_before='ifconfig eth0|sed -n "8"p|awk '{print $6}'|cut -c7-'
      sleep 2
      rx_after='ifconfig eth0|sed -n "8"p|awk '{print $2}'|cut -c7-'
      tx_after='ifconfig eth0|sed -n "8"p|awk '{print $6}'|cut -c7-'
      rx_result=$[(rx_after-rx_before)/256]
      tx_result=$[(tx_after-tx_before)/256]
      echo "$time Now_In_Speed: "$rx_result"kbps Now_OUt_Speed: "$tx_result"kbps"
      sleep 2
done

2、系統狀況監控

代碼如下:
#!/bin/sh
#systemstat.sh
#Mike.Xu
IP=192.168.1.227
top -n 2| grep "Cpu" >>./temp/cpu.txt
free -m | grep "Mem" >> ./temp/mem.txt
df -k | grep "sda1" >> ./temp/drive_sda1.txt
#df -k | grep sda2 >> ./temp/drive_sda2.txt
df -k | grep "/mnt/storage_0" >> ./temp/mnt_storage_0.txt
df -k | grep "/mnt/storage_pic" >> ./temp/mnt_storage_pic.txt
time=`date +%m"."%d" "%k":"%M`
connect=`netstat -na | grep "219.238.148.30:80" | wc -l`
echo "$time  $connect" >> ./temp/connect_count.txt

3、監控主機的磁盤空間,當使用空間超過90％就通過發mail來發警告

代碼如下:
#!/bin/bash
#monitor available disk space
SPACE='df | sed -n '/ / / $ / p' | gawk '{print $5}' | sed  's/%//'
if [ $SPACE -ge 90 ]
then
jbxue123@163.com
fi

4、 監控CPU和內存的使用情況

代碼如下:
#!/bin/bash
#script  to capture system statistics
OUTFILE=/home/xu/capstats.csv
DATE='date +%m/%d/%Y'
TIME='date +%k:%m:%s'
TIMEOUT='uptime'
VMOUT='vmstat 1 2'
 USERS='echo $TIMEOUT | gawk '{print $4}' '
LOAD='echo $TIMEOUT | gawk '{print $9}' | sed "s/,//' '
FREE='echo $VMOUT | sed -n '/[0-9]/p' | sed -n '2p' | gawk '{print $4} ' '
IDLE='echo  $VMOUT | sed -n '/[0-9]/p' | sed -n '2p' |gawk '{print $15}' '
echo "$DATE,$TIME,$USERS,$LOAD,$FREE,$IDLE" >> $OUTFILE

5、全方位監控主機

代碼如下:
#!/bin/bash
# check_xu.sh
# 0 * * * * /home/check_xu.sh

DAT="`date +%Y%m%d`"
HOUR="`date +%H`"
DIR="/home/oslog/host_${DAT}/${HOUR}"
DELAY=60
COUNT=60
# whether the responsible directory exist
if ! test -d ${DIR}
then
        /bin/mkdir -p ${DIR}
fi
# general check
export TERM=linux
/usr/bin/top -b -d ${DELAY} -n ${COUNT} > ${DIR}/top_${DAT}.log 2>&1 &
# cpu check
/usr/bin/sar -u ${DELAY} ${COUNT} > ${DIR}/cpu_${DAT}.log 2>&1 &