top of page
Writer's picturemetkaetalcskydbide

Simple Log File Watcher in Real-Time in Linux: The Best Tools and Commands



LogFusion is another real-time log monitoring tool popular among IT and software development teams. It allows you to tail logs for a view of your live environment. This tool can read text log files from a wide range of supported log formats, covering all common server and application debug logs. It also allows local and remote event log monitoring from Windows. The tool has a simple interface with easy navigation, streamlining troubleshooting. You can filter and highlight events of interest to get to the root cause of issues. In addition to simple search operators, you can use complex queries to drill down and search through numerous logs.




Simple Log File Watcher in Real-Time in Linux




A regular expression (or regex) is a syntax for finding certain text patterns within a file. Regular expressions are much more flexible than plain text searches because they let you use several techniques beyond simple string matching. They allow for a high degree of control, but constructing an accurate pattern can be difficult.


Which is a linux kernel feature to receive notification when a specific file changes. You can either write your own c program which uses the functionality or you simply build a script with the inotify-wait or inotify-watch command. You probably need to install it though. But both are well documented. New versions of tail also use this linux kernel functionality


mTail is free for personal use and you are encouraged to donate if you plan to use the program in a business environment. There are some quite useful features and a few advanced functions but for simple monitoring all you have to do is browse for or drop a text file onto the window and press Start.


PowerShell has been integrated into Windows since Windows 7 although separate installer packages are available for XP and Vista. There are more advanced commands available in PowerShell as opposed to the Windows command line and one of those commands is a built in option for PowerShell to monitor a text file and show the changes. The command itself is quite simple and works on all versions of PowerShell:


The +F (forward) option is a real-time monitoring mode in less. Use the +F option to make less display the latest messages or lines being added to a file in real-time.


Using the information from your asset inventory (files and directories list, along with their permissions and checksum information), monitor your system for any deviations. You can detect drift early on in your CI/CD pipeline, and at runtime in quasi real-time by using runtime policies.


The backoff option defines how long Filebeat waits before checking a fileagain after EOF is reached. The default is 1s, which means the file is checkedevery second if new lines were added. This enables near real-time crawling.Every time a new line appears in the file, the backoff value is reset to theinitial value. The default is 1s.


The pipeline ID can also be configured in the Elasticsearch output, butthis option usually results in simpler configuration files. If the pipeline isconfigured both in the input and output, the option from theinput is used.


You can edit the priority levels for rule categories in the classification. config file. Open the file, located at /etc/snort/conf/, and examine the different categories of rules. In the following examples, real-time notification is set for any rule with a priority level of 1. Change any of the classifications that you want to be notified of in this file to a priority of 1. For example, if you want to be notified of all successful DoS attacks, change the following line:


You can use other commands for more advanced features of swatch, but the preceding are all you will need to send alerts via email or pager. With these commands you can install real-time alerting in many different manners. Open up the .swatchrc file for editing and add the following commands:


You should now test Snort by sending traffic to generate alerts and by checking the /var/log/snort.log file. If everything is working correctly, you can move on to configuring real-time alerting with syslog-ng.


Deploying real-time alerting with the hybrid server/sensor is accomplished with syslog, swatch, and a mailing application such as sendmail. The installation and configuration of swatch is covered in this chapter. The configuration file for swatch is named .swatchrc . In the .swatchrc file you specify a string for swatch to monitor the log for and the action to take. Swatch can be configured to alert via pager, email, or audible alert.


Exporting CloudTrail logs from AWS to Datadog enables you to analyze and more deeply contextualize the events recorded with other observability data from your environment. A simple way of doing this is by using Amazon Kinesis Data Firehose, a fully managed AWS service that automates the delivery of your real-time, distributed streaming data to external data storage and analysis repositories. 2ff7e9595c


0 views0 comments

Recent Posts

See All

Comments


bottom of page