Common host monitoring Shell scripts

Frequently-used host monitoring Shell scripts recently, a friend asked me about server monitoring. besides open source software, for example, cacti, can I write shell scripts on my own outside nagios monitoring? Shell scripts written according to your needs can better meet your needs... common host monitoring Shell scripts
Recently, some people have asked me questions about server monitoring from time to time. I asked if common server monitoring software, such as cacti and nagios, can I write shell scripts by myself? The shell scripts written based on your needs can better meet your needs and refine the comprehensiveness of host monitoring. The following are some of my commonly used host monitoring scripts. you can modify them based on your situation and hope to help you. 1. View host Nic traffic #! /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 donedone 2. system status monitoring #! /Bin/sh # systemstat. sh # Mike. xuIP = 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" 219.238.14 8.30: 80 "| wc-l 'echo" $ time $ connect ">. /temp/connect_count.txt 3. monitor the disk space of the host. if the disk space exceeds 90%, send a mail to send a warning #! /Bin/bash # monitor available disk space = 'df | sed-n'/\/$/p' | gawk '{print $5}' | sed's/% // 'if [$ SPACE-ge 90] thenfty89@163.comfi 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 $15 }' 'Echo "$ DATE, $ TIME, $ USERS, $ LOAD, $ FREE, $ IDLE" >>$ OUTFILE 5. fully monitors hosts #! /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 $ {DE LAY }$ {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 every hour in crontab: 1 0 */home/check_xu.sh. in this way, the cpu, memory, network, and IO statistics of each hour are generated in the/home/oslog/host_yyyymmdd/hh directory.