diff --git a/sources/tech/20190705 Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux.md b/sources/tech/20190705 Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux.md deleted file mode 100644 index 7384fbe102..0000000000 --- a/sources/tech/20190705 Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux.md +++ /dev/null @@ -1,127 +0,0 @@ -[#]: collector: (lujun9972) -[#]: translator: (wxy) -[#]: reviewer: ( ) -[#]: publisher: ( ) -[#]: url: ( ) -[#]: subject: (Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux) -[#]: via: (https://www.2daygeek.com/linux-bash-script-to-monitor-messages-log-warning-error-critical-send-email/) -[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) - -Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux -====== - -There are many open source monitoring tools are currently available in market to monitor Linux systems performance. - -It will send an email alert when the system reaches the specified threshold limit. - -It monitors everything such as CPU utilization, Memory utilization, swap utilization, disk space utilization and much more. - -If you only have few systems and want to monitor them then writing a small shell script can make your task very easy. - -In this tutorial we have added a shell script to monitor Messages Log on Linux system. - -We had added many useful shell scripts in the past. If you want to check those, navigate to the below link. - - * **[How to automate day to day activities using shell scripts?][1]** - - - -This script will check **“warning, error and critical”** in the `/var/log/messages` file and trigger a mail to given email id, if it’s found anything related it. - -We can’t run this script frequently that may fill up your inbox if the server has many matching strings, instead we can run once in a day. - -To overcome this issue, i made the script to trigger an email in a different manner. - -If any given strings are found in the **“/var/log/messages”** file for yesterday’s date then the script will send an email alert to given email id. - -**Note:** You need to change the email id instead of ours. Also, you can change the Memory utilization threshold value as per your requirement. - -``` -# vi /opt/scripts/os-log-alert.sh - -#!/bin/bash - -#Set the variable which equal to zero - -prev_count=0 - -count=$(grep -i "`date --date='yesterday' '+%b %e'`" /var/log/messages | egrep -wi 'warning|error|critical' | wc -l) - -if [ "$prev_count" -lt "$count" ] ; then - -# Send a mail to given email id when errors found in log - -SUBJECT="WARNING: Errors found in log on "`date --date='yesterday' '+%b %e'`"" - -# This is a temp file, which is created to store the email message. - -MESSAGE="/tmp/logs.txt" - -TO="[email protected]" - -echo "ATTENTION: Errors are found in /var/log/messages. Please Check with Linux admin." >> $MESSAGE - -echo "Hostname: `hostname`" >> $MESSAGE - -echo -e "\n" >> $MESSAGE - -echo "+------------------------------------------------------------------------------------+" >> $MESSAGE - -echo "Error messages in the log file as below" >> $MESSAGE - -echo "+------------------------------------------------------------------------------------+" >> $MESSAGE - -grep -i "`date --date='yesterday' '+%b %e'`" /var/log/messages | awk '{ $3=""; print}' | egrep -wi 'warning|error|critical' >> $MESSAGE - -mail -s "$SUBJECT" "$TO" < $MESSAGE - -#rm $MESSAGE - -fi -``` - -Set an executable permission to `os-log-alert.sh` file. - -``` -$ chmod +x /opt/scripts/os-log-alert.sh -``` - -Finally add a cronjob to automate this. It will run everyday at 7'o clock. - -``` -# crontab -e -0 7 * * * /bin/bash /opt/scripts/os-log-alert.sh -``` - -**Note:** You will be getting an email alert everyday at 7 o'clock, which is for yesterday's log. - -**Output:** You will be getting an email alert similar to below. - -``` -ATTENTION: Errors are found in /var/log/messages. Please Check with Linux admin. - -+-----------------------------------------------------+ -Error messages in the log file as below -+-----------------------------------------------------+ -Jul 3 02:40:11 ns1 kernel: php-fpm[3175]: segfault at 299 ip 000055dfe7cc7e25 sp 00007ffd799d7d38 error 4 in php-fpm[55dfe7a89000+3a7000] -Jul 3 02:50:14 ns1 kernel: lmtp[8249]: segfault at 20 ip 00007f9cc05295e4 sp 00007ffc57bca1a0 error 4 in libdovecot-storage.so.0.0.0[7f9cc04df000+148000] -Jul 3 15:36:09 ns1 kernel: php-fpm[17846]: segfault at 299 ip 000055dfe7cc7e25 sp 00007ffd799d7d38 error 4 in php-fpm[55dfe7a89000+3a7000] -Jul 3 15:45:54 ns1 pure-ftpd: ([email protected]) [WARNING] Authentication failed for user [daygeek] -Jul 3 16:25:36 ns1 pure-ftpd: ([email protected]) [WARNING] Sorry, cleartext sessions and weak ciphers are not accepted on this server.#012Please reconnect using TLS security mechanisms. -Jul 3 16:44:20 ns1 kernel: php-fpm[8979]: segfault at 299 ip 000055dfe7cc7e25 sp 00007ffd799d7d38 error 4 in php-fpm[55dfe7a89000+3a7000] -``` - --------------------------------------------------------------------------------- - -via: https://www.2daygeek.com/linux-bash-script-to-monitor-messages-log-warning-error-critical-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/category/shell-script/ diff --git a/translated/tech/20190705 Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux.md b/translated/tech/20190705 Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux.md new file mode 100644 index 0000000000..02c5378bb6 --- /dev/null +++ b/translated/tech/20190705 Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux.md @@ -0,0 +1,108 @@ +[#]: collector: (lujun9972) +[#]: translator: (wxy) +[#]: reviewer: (wxy) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (Bash Script to Monitor Messages Log (Warning, Error and Critical) on Linux) +[#]: via: (https://www.2daygeek.com/linux-bash-script-to-monitor-messages-log-warning-error-critical-send-email/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +在 Linux 上用 Bash 脚本监控 messages 日志 +====== + +目前市场上有许多开源监控工具可用于监控 Linux 系统的性能。当系统达到指定的阈值限制时，它将发送电子邮件警报。它可以监视 CPU 利用率、内存利用率、交换利用率、磁盘空间利用率等所有内容。 + +如果你只有很少的系统并且想要监视它们，那么编写一个小的 shell 脚本可以使你的任务变得非常简单。 + +在本教程中，我们添加了一个 shell 脚本来监视 Linux 系统上的 messages 日志。 + +我们过去添加了许多有用的 shell 脚本。如果要查看这些内容，请导航至以下链接。 + +- [如何使用 shell 脚本监控系统的日常活动？][1] + +此脚本将检查 `/var/log/messages` 文件中的 “warning“、“error” 和 “critical”，如果发现任何有关的东西，就给指定电子邮件地址发邮件。 + +如果服务器有许多匹配的字符串，我们就不能经常运行这个可能填满收件箱的脚本，我们可以在一天内运行一次。 + +为了解决这个问题，我让脚本以不同的方式触发电子邮件。 + +如果 `/var/log/messages` 文件中昨天的日志中找到任何给定字符串，则脚本将向给定的电子邮件地址发送电子邮件警报。 + +**注意：**你需要更改电子邮件地址，而不是我们的电子邮件地址。 + +``` +# vi /opt/scripts/os-log-alert.sh +``` + +``` +#!/bin/bash +#Set the variable which equal to zero +prev_count=0 + +count=$(grep -i "`date --date='yesterday' '+%b %e'`" /var/log/messages | egrep -wi 'warning|error|critical' | wc -l) + +if [ "$prev_count" -lt "$count" ] ; then + # Send a mail to given email id when errors found in log + SUBJECT="WARNING: Errors found in log on "`date --date='yesterday' '+%b %e'`"" + # This is a temp file, which is created to store the email message. + MESSAGE="/tmp/logs.txt" + TO="2daygeek@gmail.com" + echo "ATTENTION: Errors are found in /var/log/messages. Please Check with Linux admin." >> $MESSAGE + echo "Hostname: `hostname`" >> $MESSAGE + echo -e "\n" >> $MESSAGE + echo "+------------------------------------------------------------------------------------+" >> $MESSAGE + echo "Error messages in the log file as below" >> $MESSAGE + echo "+------------------------------------------------------------------------------------+" >> $MESSAGE + grep -i "`date --date='yesterday' '+%b %e'`" /var/log/messages | awk '{ $3=""; print}' | egrep -wi 'warning|error|critical' >> $MESSAGE + mail -s "$SUBJECT" "$TO" < $MESSAGE + #rm $MESSAGE +fi +``` + +为 `os-log-alert.sh` 文件设置可执行权限。 + +``` +$ chmod +x /opt/scripts/os-log-alert.sh +``` + +最后添加一个 cron 任务来自动执行此操作。它将每天 7 点钟运行。 + +``` +# crontab -e +``` + +``` +0 7 * * * /bin/bash /opt/scripts/os-log-alert.sh +``` + +**注意：**你将在每天 7 点收到昨天日志的电子邮件提醒。 + +**输出：**你将收到类似下面的电子邮件提醒。 + +``` +ATTENTION: Errors are found in /var/log/messages. Please Check with Linux admin. + ++-----------------------------------------------------+ +Error messages in the log file as below ++-----------------------------------------------------+ +Jul 3 02:40:11 ns1 kernel: php-fpm[3175]: segfault at 299 ip 000055dfe7cc7e25 sp 00007ffd799d7d38 error 4 in php-fpm[55dfe7a89000+3a7000] +Jul 3 02:50:14 ns1 kernel: lmtp[8249]: segfault at 20 ip 00007f9cc05295e4 sp 00007ffc57bca1a0 error 4 in libdovecot-storage.so.0.0.0[7f9cc04df000+148000] +Jul 3 15:36:09 ns1 kernel: php-fpm[17846]: segfault at 299 ip 000055dfe7cc7e25 sp 00007ffd799d7d38 error 4 in php-fpm[55dfe7a89000+3a7000] +Jul 3 15:45:54 ns1 pure-ftpd: (?@5.188.62.5) [WARNING] Authentication failed for user [daygeek] +Jul 3 16:25:36 ns1 pure-ftpd: (?@104.140.148.58) [WARNING] Sorry, cleartext sessions and weak ciphers are not accepted on this server.#012Please reconnect using TLS security mechanisms. +Jul 3 16:44:20 ns1 kernel: php-fpm[8979]: segfault at 299 ip 000055dfe7cc7e25 sp 00007ffd799d7d38 error 4 in php-fpm[55dfe7a89000+3a7000]``` + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/linux-bash-script-to-monitor-messages-log-warning-error-critical-send-email/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[wxy](https://github.com/wxy) +校对：[wxy](https://github.com/wxy) + +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/category/shell-script/