In which directory are the trace option files stored by default?

Trace option files, which store detailed logging and debugging information for various processes within Junos, are stored by default in the /var/log/ directory. This directory is specifically allocated for log files, making it the appropriate location for storing trace files generated during operation.

The structure of the file system in Junos follows standard Unix/Linux conventions, where /var/log/ serves as the directory for variable-length files, including logs and trace files that may change frequently. This is why when performing any troubleshooting or analysis that involves trace options, one would navigate to /var/log/ to access these files.

The other directories mentioned, such as /etc/, /tmp/, and /usr/local/, serve different purposes within the Linux file system:

• /etc/ is used for configuration files.

• /tmp/ is intended for temporary files created by applications.

• /usr/local/ generally contains software and scripts installed locally on the system.

These other directories are not suitable for storing trace files, reinforcing why /var/log/ is the correct and default directory for this purpose.