diff --git a/sources/tech/20191111 Bash Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alert.md b/sources/tech/20191111 Bash Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alert.md new file mode 100644 index 0000000000..136748169d --- /dev/null +++ b/sources/tech/20191111 Bash Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alert.md @@ -0,0 +1,200 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (Bash Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alert) +[#]: via: (https://www.2daygeek.com/linux-bash-script-to-monitor-disk-space-usage-on-multiple-remote-linux-systems-send-email/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +Bash Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alert +====== + +Some time ago, we had wrote **[Bash script to monitor disk space usage on a Linux][1]** system with an email alert. + +That script works on a single machine, and you have to put the script on the corresponding machine. + +If you want to set disk space usage alerts on multiple computers at the same time, that script does not help you. + +So we have written this new **[shell script][2]** to achieve this. + +To do so, you need a JUMP server (centralized server) that can communicate with any other computer without a password. + +This means that password-less authentication must be set as a prerequisite. + +When the prerequisite is complete, run the script on the JUMP server. + +Finally add a **[cronjob][3]** to completely automate this process. + +Three shell scripts are included in this article, and choose the one you like. + +### 1) Bash Script-1: Bash Script to Check Disk Space Usage on Multiple Remote Linux Systems and Print Output on Terminal + +This **[bash script][4]** checks the disk space usage on a given remote machine and print the output to the terminal if the system reaches the specified threshold. + +In this example, we set the threshold limit to 80% for testing purpose and you can adjust this limit to suit your needs. + +Also, replace your email id instead of us to receive this alert. + +``` +# vi /opt/scripts/disk-usage-multiple.sh + +#!/bin/sh +output1=/tmp/disk-usage.out +echo "---------------------------------------------------------------------------" +echo "HostName Filesystem Size Used Avail Use% Mounted on" +echo "---------------------------------------------------------------------------" +for server in `more /opt/scripts/servers.txt` +do +output=`ssh $server df -Ph | tail -n +2 | sed s/%//g | awk '{ if($5 > 80) print $0;}'` +echo "$server: $output" >> $output1 +done +cat $output1 | grep G | column -t +rm $output1 +``` + +Run the script file once you have added the above script to a file. + +``` +# sh /opt/scripts/disk-usage-multiple.sh +``` + +You get an output like the one below. + +``` +------------------------------------------------------------------------------------------------ +HostName Filesystem Size Used Avail Use% Mounted on +------------------------------------------------------------------------------------------------ +server01: /dev/mapper/vg_root-lv_red 5.0G 4.3G 784M 85 /var/log/httpd +server02: /dev/mapper/vg_root-lv_var 5.8G 4.5G 1.1G 81 /var +server03: /dev/mapper/vg01-LogVol01 5.7G 4.5G 1003M 82 /usr +server04: /dev/mapper/vg01-LogVol04 4.9G 3.9G 711M 85 /usr +server05: /dev/mapper/vg_root-lv_u01 74G 56G 15G 80 /u01 +``` + +### 2) Shell Script-2: Shell Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alerts + +This shell script checks the disk space usage on a given remote machine and sends the output via a mail in a simple text once the system reaches the specified threshold. + +``` +# vi /opt/scripts/disk-usage-multiple-1.sh + +#!/bin/sh +SUBJECT="Disk Usage Report on "`date`"" +MESSAGE="/tmp/disk-usage.out" +MESSAGE1="/tmp/disk-usage-1.out" +TO="[email protected]" +echo "---------------------------------------------------------------------------------------------------" >> $MESSAGE1 +echo "HostName Filesystem Size Used Avail Use% Mounted on" >> $MESSAGE1 +echo "---------------------------------------------------------------------------------------------------" >> $MESSAGE1 +for server in `more /opt/scripts/servers.txt` +do +output=`ssh $server df -Ph | tail -n +2 | sed s/%//g | awk '{ if($5 > 80) print $0;}'` +echo "$server: $output" >> $MESSAGE +done +cat $MESSAGE | grep G | column -t >> $MESSAGE1 +mail -s "$SUBJECT" "$TO" < $MESSAGE1 +rm $MESSAGE +rm $MESSAGE1 +``` + +Run the script file once you have added the above script to a file. + +``` +# sh /opt/scripts/disk-usage-multiple-1.sh +``` + +You get an output like the one below. + +``` +------------------------------------------------------------------------------------------------ +HostName Filesystem Size Used Avail Use% Mounted on +------------------------------------------------------------------------------------------------ +server01: /dev/mapper/vg_root-lv_red 5.0G 4.3G 784M 85 /var/log/httpd +server02: /dev/mapper/vg_root-lv_var 5.8G 4.5G 1.1G 81 /var +server03: /dev/mapper/vg01-LogVol01 5.7G 4.5G 1003M 82 /usr +server04: /dev/mapper/vg01-LogVol04 4.9G 3.9G 711M 85 /usr +server05: /dev/mapper/vg_root-lv_u01 74G 56G 15G 80 /u01 +``` + +Finally add a cronjob to automate this. It will run every 10 minutes. + +``` +# crontab -e + +*/10 * * * * /bin/bash /opt/scripts/disk-usage-multiple-1.sh +``` + +### 3) Bash Script-3: Bash Script to Monitor Disk Space Usage on Multiple Remote Linux Systems With eMail Alerts + +This shell script checks the disk space usage on a given remote machine and sends the output via the mail with a CSV file if the system reaches the specified threshold. + +``` +# vi /opt/scripts/disk-usage-multiple-2.sh + +#!/bin/sh +MESSAGE="/tmp/disk-usage.out" +MESSAGE2="/tmp/disk-usage-1.csv" +echo "Server Name, Filesystem, Size, Used, Avail, Use%, Mounted on" > $MESSAGE2 +for server in thvtstrhl7 thvrhel6 +for server in `more /opt/scripts/servers-disk-usage.txt` +do +output1=`ssh $server df -Ph | tail -n +2 | sed s/%//g | awk '{ if($5 > 80) print $0;}'` +echo "$server $output1" >> $MESSAGE +done +cat $MESSAGE | grep G | column -t | while read output; +do +Sname=$(echo $output | awk '{print $1}') +Fsystem=$(echo $output | awk '{print $2}') +Size=$(echo $output | awk '{print $3}') +Used=$(echo $output | awk '{print $4}') +Avail=$(echo $output | awk '{print $5}') +Use=$(echo $output | awk '{print $6}') +Mnt=$(echo $output | awk '{print $7}') +echo "$Sname,$Fsystem,$Size,$Used,$Avail,$Use,$Mnt" >> $MESSAGE2 +done +echo "Disk Usage Report for `date +"%B %Y"`" | mailx -s "Disk Usage Report on `date`" -a /tmp/disk-usage-1.csv [email protected] +rm $MESSAGE +rm $MESSAGE2 +``` + +Run the script file once you have added the above script to a file. + +``` +# sh /opt/scripts/disk-usage-multiple-2.sh +``` + +You get an output like the one below. + +![][5] + +Finally add a cronjob to automate this. It will run every 10 minutes. + +``` +# crontab -e + +*/10 * * * * /bin/bash /opt/scripts/disk-usage-multiple-1.sh +``` + +**Note:** Because the script is scheduled to run once every 10 minutes, you will receive an email alert every 10 minutes. + +If your system reaches a given limit after 18 minutes, you will receive an email alert on the second cycle, such as after 20 minutes (2nd 10 minute cycle). + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/linux-bash-script-to-monitor-disk-space-usage-on-multiple-remote-linux-systems-send-email/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.2daygeek.com/author/magesh/ +[b]: https://github.com/lujun9972 +[1]: https://www.2daygeek.com/linux-shell-script-to-monitor-disk-space-usage-and-send-email/ +[2]: https://www.2daygeek.com/category/shell-script/ +[3]: https://www.2daygeek.com/crontab-cronjob-to-schedule-jobs-in-linux/ +[4]: https://www.2daygeek.com/category/bash-script/ +[5]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7