Which command can check a Samba configuration file for syntactical correctness?

The command that can check a Samba configuration file for syntactical correctness is testparm. This utility is specifically designed for checking the syntax of the Samba configuration file, typically located at /etc/samba/smb.conf. When you run testparm, it parses the configuration file to ensure that all parameters are correctly formatted and identifies any potential errors. Additionally, it will display the effective configuration variables and their settings, which can help in troubleshooting configuration issues.

Understanding the usage of testparm is essential for managing Samba configurations effectively, as it helps in ensuring that your settings will work as intended before restarting the Samba services. Other commands mentioned are not designed specifically to validate the syntax of Samba configuration files, making testparm the most appropriate choice for this task.