This paper introduces several common Linux monitoring scripts, which can realize the automatic monitoring and alarming of host network card traffic, system condition, host disk space, CPU and memory usage. According to their own needs to write a shell script more to meet the needs, more fine-grained host monitoring of the comprehensiveness.
Recently, some friends of the internet have asked me about the server monitoring problems, ask the common server monitoring in addition to using open source software, such as: Cacti,nagios monitoring outside can write their own shell script it? Shell scripts written to suit your needs are more satisfying. More able to refine the overall host monitoring.
Here are a few of my common host monitoring scripts, we can make changes according to their own situation, hoping to give you a little help.
1, view the host network card traffic
Copy Code code as follows:
#!/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. System condition monitoring
Copy Code code as follows:
#!/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, monitoring the host's disk space, when the use of more than 90% in space by sending mail to send a warning
Copy Code code as follows:
#!/bin/bash #monitor available disk space= ' DF | Sed-n '/\/\$/P ' | Gawk ' {print \$5} ' | Sed ' s/%//' if [\ $SPACE-ge] then fty89@163.com fi
4. Monitor CPU and Memory usage
Copy Code code as follows:
#!/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, the omni-directional monitoring host
Copy Code code as follows:
#!/bin/bash # check_xu.sh # 0 * * * * */home/check_xu.sh dat= "' Date +%y%m%d '" hour= "' Date +%h '" dir= "/home/oslog/host_\${da T}/\${hour} "delay=60 count=60 # Whether 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}.lo G 2>&1 & #/usr/bin/mpstat-p 0 \${delay} \${count} > \${dir}/cpu_0_\${dat}.log 2>&1 & #/usr/bin/m Pstat-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}/io Stat_\${dat}.log 2>&1 & # Network Check/usr/bin/sar-n DEV \${delay} \${count} > \${dir}/net_\${dat}.log 2& Gt;&1 & #/usr/bin/sar-n Edev \${delay} \${count} > \${diR}/net_edev_\${dat}.log 2>&1 &
Put it in the crontab. Automatic execution per hour:
0 * * * */home/check_xu.sh
This generates the CPU, memory, network, IO statistics for each hour in the/HOME/OSLOG/HOST_YYYYMMDD/HH directory.
If a time period problem arises, you can look at the corresponding log information, to see how the host performance.
