Shell monitoring host
1. View the traffic of the host network card
#! / bin/bash
# network
While:; do
Time='date +% m "-"% d ""% k ":"% M'
Day='date +% m "-"% d'
Rx_before='ifconfig eth0 | sed-n "8" p | awk'{print $2}'| cut-c7muri'
Tx_before='ifconfig eth0 | sed-n "8" p | awk'{print $6}'| cut-c7muri'
Sleep 2
Rx_after='ifconfig eth0 | sed-n "8" p | awk'{print $2}'| cut-c7muri'
Tx_after='ifconfig eth0 | sed-n "8" p | awk'{print $6}'| cut-c7muri'
Rx_result=$ [(rx_after-rx_before) / 256]
Tx_result=$ [(tx_after-tx_before) / 256]
Echo "$time Now_In_Speed:" $rx_result "kbps Now_OUt_Speed:" $tx_result "kbps"
Sleep 2
Done
2. System condition monitoring
#! / bin/sh
# systemstat.sh
IP=192.168.1.227
Top-n 2 | grep "Cpu" > >. / temp/cpu.txt
Free-m | grep "Mem" > >. / temp/mem.txt
Df-k | grep "sda1" > >. / temp/drive_sda1.txt
# df-k | grep sda2 > >. / temp/drive_sda2.txt
Df-k | grep "/ mnt/storage_0" > >. / temp/mnt_storage_0.txt
Df-k | grep "/ mnt/storage_pic" > >. / temp/mnt_storage_pic.txt
Time= `date +% m "."% d ""% k ":"% M`
Connect= `netstat-na | grep "219.238.148.30 grep 80" | wc-l`
Echo "$time $connect" > >. / temp/connect_count.txt
3. Monitor the disk space of the host. When the disk space exceeds 90%, send a warning by sending mail.
#! / bin/bash
# monitor available disk space
SPACE='df | sed-n'/ / $/ p'| gawk'{print $5}'| sed's Universe% Universe'
If [$SPACE-ge 90]
Then
Fty89@163.com
Fi
4. Monitor the usage of CPU and memory
#! / bin/bash
# script to capture system statistics
OUTFILE=/home/xu/capstats.csv
DATE='date +% m _% Y'
TIME='date +% k _ v% m _ v% s'
TIMEOUT='uptime'
VMOUT='vmstat 1 2'
USERS='echo $TIMEOUT | gawk'{print $4}'
LOAD='echo $TIMEOUT | gawk'{print $9}'| sed "_
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" > > $OUTFILE
5. Omni-directional monitoring of the host
#! / bin/bash
# check_xu.sh
# 0 * / home/check_xu.sh
DAT= "`date +% Y% m% d`"
HOUR= "`date +% H`"
DIR= "/ home/oslog/host_$ {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 &
Automatically executed hourly in crontab:
0 * / home/check_xu.sh
This will generate hourly cpu, memory, network, and IO statistics in the / home/oslog/host_yyyymmdd/hh directory.
If there is a problem in a certain period of time, you can look at the corresponding log information to see what the performance of the host is at that time.
