Shulou(Shulou.com)06/01 Report--

In this issue, Xiaobian will bring you five useful log analysis tools in Linux system. The article is rich in content and analyzed and described from a professional perspective. After reading this article, I hope you can gain something.

Monitoring network activity is tedious work, but there are good reasons for doing so. For example, it allows you to find and investigate suspicious logins on workstations and network-connected devices and servers, as well as determine what administrators are abusing. You can also track software installations and data transfers to identify potential problems in real time, rather than after damage has occurred.

These logs also help keep your company in compliance with the General Data Protection Regulation (GFPR) applicable to any entity operating within the EU. If your website is navigable in the European Union, then you are eligible to comply with this regulation.

Logging, including tracing and analysis, should be a fundamental process in any monitoring infrastructure. To recover a SQL Server database from a disaster, transaction log files are required. Additionally, by tracking log files, DevOps teams and DBAs can maintain optimal database performance or, in the case of cyberattacks, find evidence of unauthorized activity. Therefore, it is important to regularly monitor and analyze system logs. This is a reliable way to recreate the chain of events that caused any problems.

There are a lot of open source log trackers and analysis tools available, which makes choosing the right resource for activity logs easier than you might think. The logs provided by the free and open source software community are designed to work with a variety of sites and operating systems. Here are five of the best tools I've ever used, in no particular order.

Graylog

Graylog was founded in Germany in 2011 and is now available as an open source tool or commercial solution. It is designed as a centralized log management system that accepts data streams from different servers or endpoints and allows you to quickly browse or analyze that information.

Graylog has a good reputation among system administrators because it is easy to scale. Most Web projects start small, but they can grow exponentially. Graylog balances the load across the backend services network and can process several terabytes of log data per day.

IT administrators will find Graylog's front-end interface easy to use and powerful. Graylog is built around the concept of dashboards, which allow you to select the metrics or data sources you think are most valuable and quickly see trends over time.

When a security or performance incident occurs, IT administrators want to be able to trace the symptoms as far back as possible. Graylog's search feature makes this easy. It has built-in fault tolerance and can run multithreaded searches, so you can analyze multiple potential threats simultaneously.

Nagios

Nagios started in 1999 by a developer and has evolved into one of the most reliable open source tools for managing log data. The current version of Nagios can be integrated with servers running Microsoft Windows, Linux, or Unix.

Its main product is a log server designed to simplify data collection and make information more accessible to system administrators. Nagios log server engine captures data in real time and feeds it to a powerful search tool. The built-in setup wizard makes it easy to integrate with new endpoints or applications.

Nagios is most commonly used by organizations that need to monitor their local network security. It audits a range of network-related events and helps distribute alerts automatically. Nagios can even be configured to run predefined scripts if certain conditions are met, allowing you to solve problems before people get involved.

As part of network auditing, Nagios filters log data based on the geographic location of the log data source. This means you can use map technology to build comprehensive dashboards to understand how Web traffic flows.

Elastic Stack (ELK Stack)

Elastic Stack, commonly known as ELK Stack, is one of the most popular open source tools for organizations that need to sift through large amounts of data and understand their logging systems (and it's also my personal favorite).

Its main products consist of three separate products: Elasticsearch, Kibana and Logstash:

Elasticsearch, as its name suggests, is designed to help users find matches in a dataset using multiple query languages and types. Speed is its greatest advantage. It can scale to clusters of hundreds of server nodes, easily handling petabytes of data.

Kibana is a visualization tool that works with Elasticsearch, allowing users to analyze their data and build powerful reports. When you first install Kibana Engine on your server cluster, you will see an interface displaying statistics, graphs, and even animations.

The last part of the ELK Stack is Logstash, which enters the Elasticsearch database as a pure server-side pipe. You can integrate Logstash with various programming languages and APIs so that information from your website and mobile apps can be fed directly to the powerful Elastic Stalk search engine.

A unique feature of ELK Stack is that it allows you to monitor applications built on WordPress open source sites. ELK Stack filters Web server and database logs compared to most out-of-the-box security audit logging tools that track admin logs and PHP logs.

Poor log tracking and database management is one of the most common causes of poor website performance. Failure to regularly check, optimize, and purge database logs not only slows down your site, but can also cause it to crash completely. ELK Stack is therefore an excellent tool for every WordPress developer's toolkit.

LOGalyze

LOGalyze is a Hungarian-based organization that builds open source tools for system administrators and security experts to help them manage server logs and convert them into useful data points. Its main products can be downloaded free of charge by individual or business users.

LOGalyze is designed as a giant pipeline in which multiple servers, applications, and network devices can provide information using Simple Object Access Protocol (SOAP) methods. It provides a front-end interface where administrators can log in to monitor datasets and start analyzing data.

From LOGalyze's Web interface, you can run dynamic reports and export them to Excel files, PDF files, or other formats. These reports can be based on multidimensional statistics managed by LOGalyze backend. It can even combine data fields across servers or applications to help you spot performance trends.

LOGalyze is designed to be installed and configured in less than an hour. It has pre-built features that allow it to collect audit data in the format required by law. LOGalyze, for example, makes it easy to run different HIPAA reports to ensure your organization is complying with health laws and maintaining compliance.

Fluentd

If your organization's data sources are located in many different locations and environments, your goal should be to cluster them as closely as possible. Otherwise, you'll struggle to monitor performance and guard against security threats.

Fluentd is a powerful data collection solution that is completely open source. It does not provide a complete front-end interface, but rather acts as a collection layer to help organize different pipelines. Fluentd is used by some of the largest companies in the world, but can also be implemented in smaller organizations.

Fluentd's biggest benefit is its compatibility with today's most commonly used technology tools. For example, you can use Fluentd to collect data from Web servers such as Apache, smart device sensors, and dynamic records in MongoDB. How you process this data is entirely up to you.

Fluentd is based on the JSON data format, and it works with over 500 plugins created by brilliant developers. This allows you to extend log data to other applications and get better analysis from it with minimal manual effort.

The above is a small series for everyone to share the Linux system five easy to use log analysis tools are which, if there is just a similar doubt, may wish to refer to the above analysis to understand. If you want to know more about it, please pay attention to the industry information channel.

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