Linux系统巡检脚本

1、查看主机网卡流量

#!/bin/bash
#!/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
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
[email protected]
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/checkxu.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} > ${DIR}/cpu0${DAT}.log 2>&1 &
#/usr/bin/mpstat -P 1 ${DELAY} ${COUNT} > ${DIR}/cpu1${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} > ${DIR}/netedev${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。

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