Linux常用的系统监控shell脚本

http://www.linuxqd.com下面是我常用的几个Linux系统监控的脚本，大家可以根据自己的情况在进行修改，希望能给大家一点帮助。
1、查看主机网卡流量

#!/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、系统状况监控

#!/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、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

#!/bin/bash

#monitor
available disk space

SPACE=’df
| sed -n ‘/ / $ / p’ | gawk ‘{print $5}’ | sed ’s/%//’

if
[ $SPACE -ge 90 ]

then

fty89@163.com

fi

4、
监控CPU和内存的使用情况

#!/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、全方位监控主机

#!/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。