Linux common system monitoring shell scripts

Linux common system monitoring shell scripts

The following is a few of my common Linux system monitoring scripts, we can change according to their own situation, I hope to give you a little help.

1. Check the host network card traffic

#!/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 $} ' |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 $} ' |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. System condition Monitoring

#!/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, monitor the disk space of the host, when the use of more than 90% in space by sending mail to send a warning

#!/bin/bash

#monitor Available disk space

Space= ' DF | Sed-n '/\/$/P ' | Gawk ' {print $} ' | Sed ' s/%//'

If [$SPACE-ge 90]

Then

[Email protected]

Fi

4. Monitor CPU and Memory usage

#!/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 $} '

echo "$DATE, $TIME, $USERS, $LOAD, $FREE, $IDLE" >> $OUTFILE

5, all-round 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 &

Put it in crontab. Auto-execute every hour:

0 * * * */home/check_xu.sh

This generates hourly CPU, memory, network, and IO statistics in the/HOME/OSLOG/HOST_YYYYMMDD/HH directory.

If a time period is a problem, you can look at the corresponding log information to see how the host performance.

Linux common system monitoring shell scripts