What is the benefit of log viewing tools you have used?

Tools for log viewing help analyze and monitor the operation of applications and systems, identify errors, understand user behavior, and assess performance.

Benefits:

• Quick access to event and error logs.
• Filtering and searching by keywords, time, log level.
• Visualization and aggregation of data for easier analysis.
• Real-time monitoring.

Examples of tools I have used:

• ELK Stack (Elasticsearch, Logstash, Kibana): a powerful stack for collecting, storing, and visualizing logs.
• Splunk: a commercial tool with extensive analysis capabilities.
• Graylog: a platform for centralized log management.
• tail, grep: basic utilities for viewing and filtering logs in Linux.

Using such tools significantly speeds up problem diagnosis and improves product quality.