原文: http://turbomailtt.blog.51cto.com/934223/521336

• 查看主机网卡流量

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  #!/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

• 系统状况监控

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  #!/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

• 监控主机的磁盘空间,当使用空间超过90％就通过发mail来发警告

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  #!/bin/bash #monitor available disk space SPACE= 'df | sed -n ' / \ / $ / p ' | gawk ' {print $5} ' | sed  ' s/% // ' if [ $SPACE - ge 90 ]      then      ... fi

• 监控CPU和内存的使用情况

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  #!/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

• 全方位监控主机

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  #!/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 & #/usr/bin/mpstat -P 0 ${DELAY} ${COUNT} > ${DIR}/cpu_0_${DAT}.log 2>&1 & #/usr/bin/mpstat -P 1 ${DELAY} ${COUNT} > ${DIR}/cpu_1_${DAT}.log 2>&1 & # memory check /usr/bin/vmstat ${DELAY} ${COUNT} > ${DIR} /vmstat_ ${DAT}.log 2>&1 & # I/O check /usr/bin/iostat ${DELAY} ${COUNT} > ${DIR} /iostat_ ${DAT}.log 2>&1 & # network check /usr/bin/sar -n DEV ${DELAY} ${COUNT} > ${DIR} /net_ ${DAT}.log 2>&1 & #/usr/bin/sar -n EDEV ${DELAY} ${COUNT} > ${DIR}/net_edev_${DAT}.log 2>&1 &

放在crontab里每小时自动执行：

0 * * * * /home/check_xu.sh

这样会在/home/oslog/host_yyyymmdd/hh目录下生成各小时cpu、内存、网络，IO的统计数据。

如果某个时间段产生问题了，就可以去看对应的日志信息，看看当时的主机性能如何。