Where are most log files stored in a Linux system?

Most log files in a Linux system are stored in the /var directory. This directory is specifically designed for variable data, which includes transient and temporary files—such as logs, mail spools, and other data that may change in size and content. Within the /var directory, the subdirectory /var/log is particularly crucial, as it houses log files for the system and various applications. These logs are essential for system administration, troubleshooting, and monitoring because they record events that occur within the system, providing insights into the health and performance of both the operating system and applications.

In contrast, the /etc directory is primarily used for configuration files, while the /usr directory contains user utilities and applications. The /tmp directory is designed for temporary files that may be created by users or applications but does not serve as a standard location for log files. Thus, /var is the standard and appropriate location for storing log files in a Linux environment.