cbt:tldr:5f29d

The command cbt count "${table_name}" is used to count the number of rows in a table specified by the variable table_name.

Here's a breakdown of the command:

• cbt is the command-line tool for interacting with Cloud Bigtable, a managed NoSQL database service offered by Google Cloud.
• count is a subcommand of cbt, used specifically for counting the number of rows in a table.
• "${table_name}" is a placeholder for the actual name of the table. The command expects the name to be stored in a variable called table_name. The " surrounding the variable is used for ensuring that any special characters in the table name are treated literally.

So when you run cbt count "${table_name}", it will connect to your Cloud Bigtable instance, and count the number of rows in the specified table, which is stored in the table_name variable.