Which of the following directories is meant for storing variable files in a Linux system?

The directory designated for storing variable files in a Linux system is the one known as /var. This directory plays a crucial role in managing files that are expected to change frequently during the operation of the system. Variable files typically include things like logs, mail spools, temporary files, and databases.

For example, log files located in /var/log keep track of various system and application events, which can grow in size over time as more data is recorded. Likewise, print jobs might be queued in /var/spool/cups and email messages would be found in directories like /var/mail.

This organization is vital for maintaining a clean and efficient filesystem, as variable files are separated from static ones, which might reside in directories like /usr or /etc. Understanding the structure and purpose of these directories helps in managing and troubleshooting a Linux system effectively.